RIBA Stages Explained: How Award-Winning Architects Deliver Quality
A Complete Process Guide RIBA
Introduction: Understanding the RIBA Process
When you're planning a home extension, renovation, or new build in Brighton, understanding how architects work can transform your project experience. The architectural process might seem complex at first—terms like 'spatial coordination' and 'technical design' sound like industry jargon. But behind these phrases lies a carefully structured framework designed to deliver your dream project with clarity, quality, and confidence.
This framework is called the RIBA Plan of Work. Established by the Royal Institute of British Architects, it's the industry-standard methodology that every RIBA Chartered Practice follows. The process breaks projects into seven distinct stages, each with clear outputs, decision points, and quality checkpoints.
At ALTER Architects, we've followed this proven methodology for over 20 years across hundreds of Brighton and Hove projects. From listed building restorations in Kemp Town to contemporary extensions in Hanover, the RIBA process ensures every project—regardless of scale or complexity—receives the same rigorous, professional approach.
This guide walks you through each of the seven RIBA stages. You'll discover what happens at each point, what you can expect as a client, and how our Brighton expertise ensures smooth progress from initial consultation to final handover. Whether you're extending a Victorian terrace, converting a basement, or working with a listed property, understanding this process will help you make informed decisions and enjoy the journey of transforming your home.
What Are RIBA Stages?
The RIBA Plan of Work 2020 is a framework that organizes architectural projects into eight stages, numbered 0 through 7. Each stage represents a distinct phase of work with specific objectives, outputs, and decision points. This structured approach ensures nothing is overlooked and everyone involved—client, architect, consultants, and contractors—knows exactly what's happening at each point.
The seven stages are:
· Stage 0: Strategic Definition – Assessing project viability
· Stage 1: Preparation and Brief – Developing detailed requirements
· Stage 2: Concept Design – Exploring design options
· Stage 3: Spatial Coordination – Developing the chosen design
· Stage 4: Technical Design – Creating construction information
· Stage 5: Manufacturing and Construction – Building your project
· Stage 6: Handover – Completing and handing over
· Stage 7: In Use – Reviewing performance and providing aftercare
Each stage builds logically on the previous one. You wouldn't start detailed technical drawings before settling on a concept design, just as you wouldn't begin construction before finalizing technical details. This sequential approach minimizes risk, reduces costly changes, and ensures quality outcomes.
The process typically takes 6-12 months from initial consultation to planning approval, depending on project complexity. Factors like listed building consent, conservation area requirements, or structural complexity can extend timelines—but the RIBA framework ensures these challenges are identified and managed early.
Throughout the journey, key decision points occur where your input shapes the project direction. You'll choose between design options, approve planning strategies, and make material selections. The RIBA process ensures these decisions happen at the right moment, informed by complete information.
For Brighton and Hove projects, the RIBA stages also provide natural checkpoints for engaging with local planning requirements. Whether you're working in a conservation area or with a listed building, each stage integrates heritage considerations and planning compliance from the outset.
Stage 0: Strategic Definition
Every successful project begins with Stage 0: Strategic Definition. This initial stage determines whether your project idea is viable and worth pursuing. Think of it as the foundation upon which everything else is built—get this stage right, and the rest follows smoothly.
What Happens in Stage 0?
During Strategic Definition, we explore your project's fundamental feasibility. This involves initial site assessment, understanding your aspirations, and identifying any obvious constraints or opportunities. We're not making design decisions yet—we're establishing whether your vision aligns with what's achievable on your specific site.
For Brighton and Hove properties, Stage 0 includes reviewing planning history, checking conservation area status, and identifying any listed building constraints. If your Victorian terrace sits in the Clifton Hill conservation area, for example, we'll flag this immediately. If previous planning applications have been refused, we'll understand why and assess whether our approach could succeed.
We also conduct preliminary research into site conditions. Does your property have access constraints? Are there protected trees? Is the site in a flood zone? These factors don't necessarily prevent development, but identifying them early ensures realistic planning.
Key Outputs
Stage 0 typically produces:
· Initial project brief capturing your requirements
· Site appraisal identifying opportunities and constraints
· Feasibility assessment of your aspirations
· Preliminary timeline and process overview
· Identification of key risks or challenges
· Recommendation on whether to proceed
The Decision Point
At the end of Stage 0, you face your first major decision: proceed to formal project development or not. If feasibility looks positive, we move to Stage 1 to develop a comprehensive project brief. If significant constraints emerge—perhaps a previous refusal suggests the planning authority won't support your type of development—we'll discuss alternative approaches or advise against proceeding.
This honest, upfront assessment saves time, money, and disappointment. After two decades of Brighton projects, we've learned that realistic feasibility assessment at Stage 0 sets the tone for successful outcomes. We'd rather advise against a problematic project early than lead you down an uncertain path.
ALTER's Approach to Stage 0
Our Stage 0 consultations benefit from deep local knowledge. We've worked across every Brighton neighborhood, understand the nuances of different conservation areas, and maintain strong relationships with planning officers. This experience allows us to provide confident feasibility assessments quickly—often within one or two meetings.
Stage 1: Preparation and Brief
Once you've decided to proceed, Stage 1 develops the detailed project brief that will guide all subsequent design work. This stage transforms your initial aspirations into a comprehensive, documented set of requirements, priorities, and constraints.
Detailed Requirements Capture
Stage 1 involves thorough exploration of what you want to achieve. How many bedrooms do you need? How will you use your new kitchen-dining space? What's your preferred aesthetic—contemporary, traditional, or a blend? Do you need home office space? How important is natural light? These questions build a complete picture of your functional and aesthetic requirements.
We also establish priorities. Every project involves compromises, so understanding what matters most helps make informed design decisions. Perhaps maximizing floor area is more important than garden space, or retaining period features outweighs achieving contemporary openness.
Site Analysis and Surveys
Comprehensive site analysis occurs during Stage 1. This includes:
· Measured survey of existing building (plans, elevations, sections)
· Site context analysis (neighboring properties, overlooking, boundaries)
· Topographical survey if relevant (slopes, levels, drainage)
· Structural assessment identifying load-bearing elements
· Photographic record of existing conditions
· Analysis of orientation, sunlight, and views
For listed buildings or properties in conservation areas—common across Brighton—Stage 1 includes heritage assessment. We document significant architectural features, understand the building's history, and identify elements requiring special consideration or protection.
Planning Context Review
Stage 1 establishes the planning framework for your project. We review relevant planning policies, assess whether permitted development rights apply, and identify the appropriate planning route. Should we pursue full planning permission or householder application? Would pre-application advice from Brighton & Hove City Council reduce risk?
Our local expertise proves invaluable here. Brighton's planning policies emphasize design quality, heritage protection, and sustainable development. Understanding how your project aligns with these priorities—and where challenges might arise—allows us to develop strategies that maximize approval chances.
The Comprehensive Project Brief
Stage 1 concludes with a complete project brief document. This defines:
· Detailed functional requirements (room schedule, space sizes, adjacencies)
· Aesthetic aspirations and design preferences
· Site constraints and opportunities
· Planning context and strategy
· Technical requirements (structural, servicing, sustainability)
· Project timeline and key milestones
· Quality standards and performance targets
This brief becomes the reference point for all design development. It ensures everyone involved—architect, consultants, and you as client—shares a common understanding of project objectives.
Stage 2: Concept Design
Stage 2 is where your project comes to life visually. This is often the most exciting phase for clients—seeing ideas transformed into tangible designs you can walk through mentally, discussing how spaces will feel and function.
Exploring Design Options
We typically present three distinct design options, each responding to your brief in different ways. These aren't minor variations—they're genuinely different approaches that explore various possibilities. One option might maximize floor area, another prioritize garden connection, while a third focuses on retaining period character.
These designs aren't just floor plans. We create 3D visualizations that help you understand how spaces will feel, how light moves through rooms at different times of day, and how your extension sits within its context. Elevations show external appearance, sections reveal ceiling heights and level changes, and sketch views convey atmosphere and character.
Heritage Sensitivity in Design
In Brighton, Stage 2 requires particular sensitivity. If your project sits in a conservation area like Clifton Hill, Round Hill, or The Lanes, we carefully consider heritage impact from the outset. Contemporary design can enhance historic settings when approached thoughtfully—our award-winning portfolio demonstrates this principle.
For listed buildings, concept design balances ambition with respect. How can we achieve the space and light you need while protecting significant architectural features? Where can we be boldly contemporary, and where should we defer to existing character? These questions shape design decisions throughout Stage 2.
Client Collaboration and Feedback
We present concept designs in a collaborative workshop session. You'll see all options side-by-side, understand the rationale behind each approach, and discuss pros and cons. What works? What doesn't? Are there elements from different options you'd like to combine?
Your feedback shapes design refinement. Perhaps Option A has the right form but Option B's internal layout works better. Maybe you love the contemporary aesthetic of Option C but want to retain more period features. Stage 2 is inherently iterative—we expect several rounds of refinement before you're completely satisfied.
Planning Strategy Development
Alongside design development, we formulate your planning strategy. Which design option has the best chance of planning approval? Should we pursue pre-application advice to test the water? Are there elements we should modify to strengthen the application?
Our Brighton experience informs these strategic decisions. We understand what local planning officers respond well to, how to present heritage impact positively, and when to involve heritage consultants for complex listed building applications. This local knowledge increases approval success rates significantly.
The Major Decision Point
Stage 2 ends with your most significant project decision: choosing which design to develop forward. Once you've selected your preferred design direction—perhaps with some modifications or combinations—we have clarity on what we're delivering.
This decision point is crucial. Changing fundamental design direction after Stage 2 causes delays and rework. That's why we invest time in exploring options thoroughly during this stage—better to resolve uncertainties now than discover problems later.
Key Stage 2 Outputs
· Multiple concept design options (plans, elevations, sections, 3D views)
· Refined concept design based on your feedback
· Planning strategy and approach
· Preliminary structural strategy
· Initial sustainability approach
· Updated project timeline
· Confirmation of chosen design direction
With your chosen concept approved, we're ready to progress to detailed design development in Stage 3.
Stage 3: Spatial Coordination
Stage 3—formerly called Developed Design—takes your chosen concept and develops it into a fully coordinated, detailed design ready for planning submission. This is where ideas become concrete proposals with all technical disciplines working together.
Detailed Design Development
We develop every aspect of the chosen concept to a much greater level of detail. Room layouts are finalized with exact dimensions. Window positions and sizes are confirmed. Material selections move from conceptual ("contemporary cladding") to specific ("western red cedar rainscreen with stainless steel fixing"). Floor, wall, and ceiling finishes are defined.
This detail allows accurate visualization and helps you make informed decisions about how the finished project will look and feel. We produce detailed 3D visualizations showing material textures, colors, and how your extension sits within its context—crucial for conservation area projects where contextual fit matters enormously.
Technical Coordination Begins
Stage 3 involves bringing specialist consultants into the design process:
· Structural engineer – designing foundations, beams, floor structures
· Building services engineer – planning heating, electrical, ventilation
· Party wall surveyor – preparing notices if working on shared walls
· Heritage consultant – advising on listed building applications if needed
· Acoustic consultant – addressing sound insulation requirements
· Landscape architect – integrating external spaces
These specialists work collaboratively, ensuring their proposals integrate seamlessly. The structural engineer's beam positions must coordinate with the services engineer's duct routes. Window positions must work for both architectural composition and structural integrity. This coordination prevents conflicts that could delay construction or compromise design quality.
Planning Application Preparation
A primary Stage 3 output is your planning application. We prepare comprehensive drawing packages including:
· Existing and proposed floor plans
· Existing and proposed elevations (all sides)
· Existing and proposed sections
· Site location plan and block plan
· Design and Access Statement
· Heritage Statement (for listed buildings/conservation areas)
· Planning statement addressing policy compliance
For Brighton projects, we tailor planning submissions to local requirements. If you're in a conservation area, our Heritage Statement demonstrates how the design respects local character. For larger projects, our Design and Access Statement explains how the proposal enhances its context and delivers quality design.
The Planning Submission Decision
Stage 3 concludes with planning application submission. Before this happens, you'll review and approve all drawings and supporting documents. We explain what the planning process involves—typical timelines (8 weeks for householder applications, 13 weeks for full planning), validation requirements, and potential outcomes.
Once submitted, the planning authority validates your application, consults neighbors, and assesses proposals against planning policies. Our role continues through this period—responding to officer queries, addressing neighbor concerns, and negotiating amendments if requested.
With planning submitted, we can proceed to Stage 4 (Technical Design) in parallel with the planning process, maximizing efficiency and minimizing overall project duration.
Stage 4: Technical Design
Stage 4 translates design intent into precise construction information. This is where architectural vision becomes buildable reality—detailed drawings and specifications that contractors use to price and construct your project accurately.
Detailed Construction Drawings
Technical design involves producing comprehensive drawing packages showing exactly how everything is built. These drawings include:
· Construction floor plans with dimensions, levels, and materials
· Construction sections showing wall buildups, insulation, finishes
· Roof plans detailing drainage, insulation, and coverings
· Window and door schedules with sizes, materials, glazing specs
· Construction details at junctions, eaves, thresholds
· Foundation and structural drawings
· Services layouts (heating, electrical, drainage)
· External works and landscaping details
The level of detail is substantial. We're not just showing "a window"—we're specifying the exact window system, frame material, glass specification, opening mechanism, finish color, and installation method. This precision ensures contractors understand exactly what's required and can price accurately.
Specifications and Standards
Alongside drawings, we produce detailed specifications describing materials, workmanship standards, and construction methods. Specifications cover everything from concrete mix designs to paint systems, ensuring quality isn't left to chance.
For Brighton heritage projects, specifications are particularly important. We might specify lime mortar for listed building repairs, traditional timber windows matching original profiles, or specialist conservation techniques for sensitive interventions. These details protect heritage significance while achieving contemporary performance standards.
Building Control Compliance
Stage 4 includes demonstrating Building Regulations compliance. We coordinate with building control (either local authority or approved inspector) to ensure designs meet all regulatory requirements:
· Structural stability and safety
· Fire safety (means of escape, fire resistance, alarms)
· Sound insulation between dwellings
· Thermal performance and energy efficiency
· Ventilation and indoor air quality
· Drainage and sanitation
· Electrical safety
· Accessibility requirements
We prepare calculations, specifications, and details demonstrating compliance. This work prevents delays during construction—building control approves your design before work starts, giving confidence that everything is correctly designed.
Contractor Tender Package
The complete Stage 4 output forms a tender package for contractors. This includes all construction drawings, specifications, and schedules—everything needed for contractors to understand scope and provide accurate prices.
We typically send tender packages to three to five contractors, allowing competitive pricing while maintaining quality focus. Our tender documents also include contract terms, programme requirements, and quality expectations—establishing clear parameters from the outset.
The Contractor Appointment Decision
Stage 4 ends when you appoint a contractor. We review tender returns with you, comparing not just prices but programme duration, proposed methods, and contractor experience. Our recommendation balances cost with quality, reliability, and appropriate experience for your specific project type.
With contractor appointed and building control approved, you're ready to start construction—Stage 5 of the RIBA process.
Stage 5: Manufacturing and Construction
Stage 5 is where design becomes physical reality. Construction typically represents the longest phase of the RIBA process—for residential extensions, expect 12-20 weeks depending on project scale and complexity.
Contract Administration
During construction, architects provide contract administration services—sometimes called "project administration" or "site inspections." This involves:
· Regular site visits to inspect work quality and progress
· Responding to contractor queries and providing clarifications
· Reviewing contractor proposals and material samples
· Issuing architect's instructions for changes or additional work
· Assessing progress for payment valuations
· Coordinating building control inspections
· Problem-solving when unexpected conditions arise
Site inspections occur at key stages—foundations, structural frame, pre-plaster, practical completion. These inspections verify work matches drawings and specifications, maintaining quality standards throughout construction.
Managing Changes and Variations
Construction invariably involves changes. Perhaps you've selected different tiles than originally specified. Maybe unexpected ground conditions require foundation changes. Or you've decided to add skylights you initially deferred.
We manage variations formally, documenting changes, assessing cost implications, and obtaining your approval before instructing contractors. This process protects both you and the contractor—everyone knows what's included, what's changed, and financial implications.
Quality Assurance
Our role during Stage 5 centers on protecting your interests. We verify workmanship quality, ensure materials match specifications, and confirm construction follows approved drawings. If issues arise—and they occasionally do—we require contractors to rectify work before signing off stages.
For heritage projects, quality oversight is particularly important. Conservation work requires specialist techniques and attention to detail. We verify contractors employ appropriate methods, use correct materials, and achieve the craftsmanship standards heritage properties demand.
Client Communication
We maintain regular communication throughout construction, providing progress updates, addressing your questions, and flagging any issues requiring decisions. Site visits offer opportunities to see your project taking shape and make final selections—paint colors, fixture positions, landscaping details.
As construction nears completion, we coordinate practical completion inspections, preparing comprehensive snagging lists of minor items requiring attention before final handover.
Stage 6: Handover
Stage 6 marks the transition from construction to occupation. This brief but important phase ensures everything is complete, documented, and ready for you to enjoy your transformed home.
Practical Completion Inspection
Practical completion occurs when construction is substantially finished and the building is fit for occupation. We conduct a detailed inspection, creating a comprehensive snagging list of any minor items requiring attention—touch-up painting, adjustments to doors, cleaning, final landscaping.
Once satisfied that all major work is complete and only minor snagging remains, we issue the Practical Completion Certificate. This formal document confirms contractual completion, triggering final payment stages and starting defects liability periods.
Building Control Completion
We coordinate final building control inspections, ensuring all regulatory requirements are satisfied. Building control issues a Completion Certificate confirming your project complies with Building Regulations—an essential document for property sales and insurance.
Documentation Handover
At handover, you receive comprehensive project documentation:
· As-built drawings showing final construction
· Operation and maintenance manuals for equipment
· Warranties and guarantees for materials and systems
· Building control completion certificate
· Planning approval documents
· Health and safety file
· Energy Performance Certificate (EPC)
These documents are essential for future reference—whether you're explaining alterations during property sale, conducting maintenance, or planning future modifications.
Defects Liability Period
Following practical completion, a defects liability period (typically 12 months) begins. During this time, contractors remain responsible for rectifying any defects arising from poor workmanship or materials. We help identify and document defects, instructing contractors to return and rectify issues.
At the end of the defects period, we conduct a final inspection and issue the Final Certificate, formally completing the contract and releasing any retention held.
Stage 7: In Use
Stage 7 represents the RIBA Plan of Work's commitment to learning and continuous improvement. While the building is now complete and occupied, Stage 7 involves reviewing how the project performs in reality compared to design intentions.
Post-Occupancy Evaluation
Several months after completion, we conduct post-occupancy evaluation—reviewing how your home performs now you've lived in it through different seasons. Does the heating system work efficiently? Is natural light as anticipated? Have you adapted how you use spaces?
This feedback informs our future designs. Perhaps thermal performance exceeds expectations, validating our insulation strategy. Maybe you've discovered the utility room could be larger. These insights improve how we design subsequent projects.
Ongoing Aftercare
Stage 7 also encompasses aftercare support. Questions arise when living in altered spaces—how to maintain materials, where services are routed, how to adjust heating controls. We remain available to answer questions, provide advice, and support you as you settle into your enhanced home.
Long-Term Relationship
Many clients return years later for additional projects—extending further, converting lofts, remodeling other areas. Stage 7 maintains our relationship beyond formal project completion, establishing foundations for future collaboration.
This long-term perspective distinguishes professional architectural practice. We're not just delivering a one-off project—we're establishing relationships with buildings and clients that endure for years.
Timeline Overview: How Long Does the RIBA Process Take?
Understanding project timelines helps set realistic expectations. While every project differs, typical residential extensions follow predictable durations for each RIBA stage.
Typical Timeline Breakdown
Stage 0-1 (Strategic Definition & Brief): 2-3 weeks
Initial consultations, site surveys, and brief development happen relatively quickly for straightforward projects. Complex sites or listed buildings may require additional investigation time.
Stage 2 (Concept Design): 4-6 weeks
Developing multiple design options, client feedback, and refinement iterations. More complex projects or clients requiring extensive exploration may extend this period.
Stage 3 (Spatial Coordination): 6-8 weeks
Detailed design development, consultant coordination, and planning application preparation. Heritage projects requiring specialist consultants may take longer.
Planning Determination: 8 weeks (householder) or 13 weeks (full planning)
This period runs in parallel with Stage 4. Brighton & Hove City Council's determination timelines are statutory, though complex applications may take longer.
Stage 4 (Technical Design): 8-10 weeks
Detailed construction drawings, building control approval, and tender process.
Stage 5 (Construction): 12-20 weeks
Duration varies significantly with project scale. Basement conversions may take 20+ weeks, while rear extensions might complete in 12-14 weeks.
Total Pre-Construction: 6-9 months (from initial consultation to construction start)
Total Project Duration: 9-15 months (including construction)
Factors Affecting Duration
· Listed building consent (adds 8 weeks to planning timeline)
· Party wall agreements (3+ months if neighbors initially object)
· Structural complexity (complex engineering requires longer design periods)
· Client decision-making speed (delays in feedback extend every stage)
· Planning negotiations (amendments requested by officers add weeks)
· Construction access constraints (restricted access slows building work)
Key Decision Points Throughout the RIBA Process
The RIBA framework structures client involvement around key decision points where your input shapes project direction. Understanding when decisions occur helps you prepare and engage effectively.
Stage 0-1: Proceed or Not?
After feasibility assessment, you decide whether to proceed with formal design development. This fundamental decision determines whether to invest time and resources in the full architectural process.
Stage 2: Design Direction Selection
Your most significant design decision occurs at Stage 2. Choosing between concept options—or combining elements from different approaches—sets the design direction for all subsequent work. This decision shapes your home's appearance, functionality, and character.
Stage 3: Planning Strategy Approval
Before submitting planning applications, you approve the final design and planning strategy. This includes reviewing all drawings, understanding planning risks, and confirming you're comfortable proceeding to formal submission.
Stage 4: Contractor Appointment
After receiving contractor tenders, you choose which contractor to appoint. This decision balances price, quality, programme, and contractor experience. We guide this decision, but ultimate choice rests with you.
Stage 5: Material Selections and Changes
Throughout construction, you make numerous selections—final paint colors, tile choices, fixture positions, landscaping details. While individually small, these decisions collectively define your home's finished character.
You also decide whether to approve any variations contractors propose. Understanding cost and programme implications helps make informed decisions about changes during construction.
How ALTER Architects Applies Expertise Throughout RIBA Stages
While the RIBA Plan of Work provides a universal framework, how architects apply it varies significantly. At ALTER Architects, two decades of Brighton and Hove experience informs how we navigate each stage.
Deep Local Planning Knowledge
Brighton's planning landscape is uniquely complex—34 conservation areas, extensive listed building stock, and planning policies emphasizing design quality and heritage protection. We've worked across every neighborhood, understand the nuances of different conservation areas, and maintain strong working relationships with local planning officers.
This expertise accelerates planning success. We know which design approaches officers respond positively to, when pre-application advice adds value, and how to present proposals in ways that demonstrate planning compliance and design quality.
Award-Winning Design Quality
Our RIBA South East award recognition validates our design quality and rigorous process adherence. These accolades aren't just marketing—they demonstrate consistent delivery of architecture that enhances both client lives and the wider built environment.
Award-winning design doesn't happen accidentally. It results from thorough Stage 2 exploration, careful Stage 3 refinement, and precise Stage 4 detailing. Quality outcomes emerge from rigorous process execution.
Heritage Sensitivity
Many Brighton projects involve listed buildings or conservation areas. We've developed specialist expertise in sensitive heritage interventions—understanding how to achieve contemporary performance and functionality while respecting historic significance.
This expertise informs every RIBA stage. During Stage 1, we identify significant features requiring protection. In Stage 2, design concepts balance ambition with respect. Through Stages 3-4, specifications ensure traditional materials and techniques are employed where appropriate. During Stage 5, we verify contractors execute conservation work to required standards.
Technical Excellence in Detailing
Stage 4 technical design quality determines construction outcomes. Our detailed drawings and specifications leave nothing to chance—contractors understand exactly what's required, reducing site queries, minimizing errors, and ensuring quality workmanship.
This technical rigor also protects you financially. When tender documentation is comprehensive and clear, contractors price accurately and competitively. Ambiguous documentation leads to cautious pricing and increased variations during construction.
Client-Focused Collaboration
RIBA stages succeed through effective collaboration. We maintain clear, regular communication throughout the process—explaining what's happening at each stage, what decisions are needed, and what to expect next. Architectural projects are significant investments involving complex decisions. Demystifying the process and providing confident guidance ensures you feel informed and in control throughout the journey.
Client Journey Case Study: Victorian Terrace Rear Extension
Understanding how RIBA stages work in practice helps visualize your own project journey. Here's how the process unfolded for a typical Brighton project—a contemporary rear extension to a Victorian terrace in a conservation area.
The Brief
Our clients needed additional kitchen-dining space with better garden connection. Their existing Victorian terrace had a small, dark kitchen in a single-storey rear projection. They wanted contemporary open-plan living while respecting the property's period character.
Stages 0-1: Initial Consultation and Brief (2 weeks)
We conducted site survey and initial feasibility assessment. The property sat in a conservation area, requiring careful design approach. Previous planning applications for neighboring properties provided useful precedents. We confirmed the project was viable and developed a comprehensive brief capturing the clients' functional and aesthetic aspirations.
Stage 2: Concept Design (5 weeks)
We presented three design options. Option A proposed a traditional form with contemporary detailing. Option B suggested a boldly contemporary addition clearly distinguished from the Victorian host. Option C combined elements—contemporary but sympathetic in scale and proportion.
After reviewing 3D visualizations and discussing pros and cons, clients chose a refined version of Option C—contemporary architecture that deferred to the Victorian terrace's scale while creating light-filled modern living space.
Stage 3: Spatial Coordination (7 weeks)
We developed detailed design with structural engineer input, coordinated building services, and prepared comprehensive planning application including Heritage Statement. The application emphasized how contemporary design enhanced the conservation area through quality architecture. Planning was submitted at week 7.
Planning Determination (8 weeks)
Brighton & Hove planning officers requested minor amendments to roof material. We responded promptly, and planning permission was granted without committee referral.
Stage 4: Technical Design (8 weeks, parallel with planning)
During planning determination, we developed detailed construction drawings and specifications. Once planning was approved, we immediately tendered to three contractors. After reviewing returns, clients appointed a contractor we'd successfully worked with previously.
Stage 5: Construction (14 weeks)
Construction proceeded smoothly with bi-weekly site inspections. Building control inspections passed first time. The project completed one week earlier than programmed, with only minor snagging items.
Stages 6-7: Handover and Aftercare (ongoing)
We issued Practical Completion Certificate, building control completion followed, and clients moved into their transformed home. Six months later, post-occupancy review confirmed the extension performed exactly as designed—light-filled, thermally comfortable, and perfectly integrated with existing spaces.
Total Timeline: 10 months from initial consultation to completion certificate.
What Architects Deliver at Each RIBA Stage
Understanding what you receive at each RIBA stage helps set clear expectations. Here's what architects typically deliver throughout the process:
Stages 0-1 Deliverables
· Feasibility report assessing project viability
· Initial site analysis and constraints review
· Comprehensive project brief document
· Measured survey drawings (existing plans, elevations, sections)
· Photographic site record
· Project timeline and process overview
Stage 2 Deliverables
· Multiple concept design options (3D views, plans, elevations)
· Refined concept design based on feedback
· 3D visualizations showing design intent
· Planning strategy and advice
· Preliminary structural approach
Stage 3 Deliverables
· Detailed architectural drawings (plans, elevations, sections)
· Complete planning application package
· Design and Access Statement
· Heritage Statement (if applicable)
· Coordinated consultant designs (structural, services)
· Updated 3D visualizations and detailed views
Stage 4 Deliverables
· Comprehensive construction drawing package
· Technical specifications for all materials and workmanship
· Building control submission and approval
· Contractor tender documents
· Window, door, and fixture schedules
· Construction details at key junctions
Stage 5 Deliverables
· Regular site inspection reports
· Architect's instructions for changes or clarifications
· Progress meeting minutes
· Responses to contractor queries
· Practical Completion Certificate
Stage 6 Deliverables
· Snagging list and inspection report
· As-built drawings showing final construction
· Operation and maintenance manuals
· Building control completion certificate
· Final Certificate (after defects period)
Why the RIBA Process Matters
You might wonder whether the structured RIBA approach is necessary. Couldn't you just hire a designer and get started? While faster routes exist, the RIBA framework provides crucial benefits that protect your interests and ensure quality outcomes.
Professional Standards and Accountability
RIBA Chartered Practices commit to professional standards, codes of conduct, and ethical practice. This commitment provides accountability—you're working with professionals bound by rigorous standards who can be held accountable if they fall short.
Quality Assurance Through Process
The staged approach ensures quality at every step. You don't jump straight to construction drawings without thoroughly exploring concepts. Technical designs don't proceed before spatial coordination is complete. Each stage builds on solid foundations, reducing risk and preventing costly mistakes.
Client Protection
RIBA Chartered Practices carry professional indemnity insurance, protecting you if design errors occur. Standard RIBA contracts establish clear roles, responsibilities, and payment terms. These protections matter enormously when you're investing significantly in your property.
Predictable Project Delivery
The RIBA framework provides predictability. You know what's happening at each stage, what decisions are needed, and what outputs to expect. This clarity reduces stress and ensures smooth project progression.
Industry-Recognized Best Practice
RIBA stages represent industry consensus on how architectural projects should be delivered. Contractors, consultants, and planners understand the framework. This shared language facilitates collaboration and ensures all parties work cohesively.
Peace of Mind for Major Investment
Home alterations represent significant investment—often tens or hundreds of thousands of pounds. The RIBA process provides confidence that your investment is protected through professional, rigorous, quality-focused architectural practice.
Frequently Asked Questions About RIBA Stages
1. How long does the entire RIBA process take?
For typical residential extensions, expect 6-9 months from initial consultation to construction start, then 12-20 weeks for construction itself. Total project duration typically ranges from 9-15 months. However, timelines vary significantly based on project complexity, planning requirements (listed building consent adds 8 weeks), and client decision-making speed. Brighton conservation area projects may take longer due to heritage considerations.
2. Can RIBA stages overlap to save time?
Yes, some stages can run partially in parallel. Most commonly, Stage 4 (Technical Design) begins during planning determination after Stage 3 submission. This maximizes efficiency—once planning approval arrives, technical drawings are ready for immediate tendering. However, stages cannot be skipped entirely without compromising quality and increasing risk.
3. What happens if planning permission is refused?
Planning refusal isn't the end. Most refusals cite specific concerns that can be addressed through design amendments. We analyze refusal reasons, develop revised proposals addressing officers' concerns, and resubmit. Alternatively, we might recommend a planning appeal if refusal seems unreasonable. Our Brighton experience means planning refusals are rare—we design with approval in mind from Stage 2 onwards.
4. Do I need an architect for all RIBA stages?
Legally, you don't need an architect at all—anyone can submit planning applications or oversee construction. However, RIBA-qualified architects bring professional expertise, design quality, and contractual protection that non-professionals cannot offer. Some clients appoint architects for design stages (0-4) then manage construction themselves, though this increases risk significantly. We recommend architect involvement throughout for optimal outcomes.
5. How involved am I as a client at each stage?
Client involvement varies by stage. Stages 0-2 require high engagement—you're defining requirements and choosing designs. Stage 3 involvement is moderate—reviewing detailed designs and approving planning submissions. Stage 4 requires less input—mainly approving technical decisions and contractor selection. Stage 5 involvement increases again—site visits, material selections, and responding to contractor queries. We guide you on when input is needed at each point.
6. What's the difference between Stages 3 and 4?
Stage 3 (Spatial Coordination) develops designs to planning submission level—enough detail to demonstrate what you're proposing externally and internally, coordinated with structural and services engineers. Stage 4 (Technical Design) goes much further—creating construction-ready drawings with every detail specified for contractors to price and build accurately. Think of Stage 3 as 'design intent' and Stage 4 as 'construction reality.'
7. Can I change my mind during the process?
Yes, but timing matters enormously. Changing direction during Stage 2 is relatively straightforward—we're still exploring options. Fundamental changes after Stage 2 cause delays and rework, but remain possible if you're willing to accept time and cost implications. Once construction begins (Stage 5), changes become significantly more expensive. Good client-architect communication minimizes the need for major changes.
8. What if I have a listed building?
Listed buildings add an extra layer—Listed Building Consent—running parallel to planning permission. This extends Stage 3 by 8 weeks typically. We engage heritage consultants if needed, prepare Heritage Statements demonstrating minimal harm to significance, and often recommend pre-application advice to test proposals before formal submission. ALTER's heritage experience makes us particularly well-placed for sensitive listed building projects.
9. How does ALTER adapt RIBA stages for Brighton projects?
We integrate Brighton planning context from Stage 0 onwards. Conservation area implications inform feasibility assessment. Heritage considerations shape Stage 2 concept designs. Our established relationships with planning officers mean we understand what they respond positively to. Twenty years of local experience means we navigate Brighton's planning landscape efficiently, maximizing approval success while minimizing delays.
10. What happens after Stage 7?
Stage 7 formally completes the RIBA process, but our relationship with clients and projects continues. Many clients return for additional projects years later—further extensions, loft conversions, complete renovations. We also maintain ongoing dialogue, answer questions about your home, and provide advice on maintenance and future alterations. Architecture is a long-term commitment, not just a transactional service.
Start Your RIBA Journey with ALTER Architects
Understanding the RIBA process demystifies architectural projects, transforming what might seem complex into a clear, manageable journey. Whether you're planning a rear extension, loft conversion, basement development, or complete renovation, the seven-stage framework ensures quality, clarity, and confidence throughout.
At ALTER Architects, we've guided hundreds of Brighton and Hove clients through this process over two decades. Our award-winning portfolio, heritage expertise, and deep local planning knowledge mean we navigate each stage efficiently and effectively. We're not just following a process—we're applying professional excellence to transform your home.
Ready to begin? Stage 0 starts with a simple conversation. We'll visit your property, discuss your aspirations, assess feasibility, and provide honest advice on what's achievable. There's no obligation—just professional expertise and local knowledge helping you make informed decisions about your home's future.
Contact ALTER Architects today to arrange your initial Stage 0 consultation. Let's explore what's possible for your Brighton property through rigorous, quality-focused RIBA architectural practice.
