The RIBA Plan of Work 2020: A Complete Guide for UK Architects
What is the RIBA Plan of Work 2020?
The RIBA Plan of Work is the standard framework UK architects use to manage building projects. The 2020 version updated the 2013 edition to include stronger requirements for sustainability and BIM.
It breaks building projects into eight stages, from initial discussions through to the building being occupied and reviewed.
What Happens at Each Stage
Stage 0: Strategic Definition
This stage determines whether building something is the right solution. You develop a business case, set initial budgets, and define sustainability goals.
Duration: 2-4 weeks for extensions, 6-8 weeks for new builds
Deliverables:
- Strategic Brief
- Initial budget
- Sustainability targets
Stage 1: Preparation and Briefing
The project team forms and develops a detailed brief. Feasibility studies are conducted and the project scope is properly defined. Residential clients typically select their architect and confirm budgets at this stage.
Deliverables:
- Final Project Brief
- Digital Execution Plan
- Refined budget
Stage 2: Concept Design
Initial designs are developed based on the brief and site constraints. Clients review concepts, materials are selected, and costs are refined. BIM models start at LOD 100-200.
Deliverables:
- Agreed concept design
- Updated cost plan
- Sustainability strategy
Stage 3: Spatial Coordination
The design is tested and coordinated with all building systems. Engineering consultants fully engage and planning applications are submitted.
Note: Planning decisions typically take 8-13 weeks.
Deliverables:
- Coordinated drawings
- Planning application
- Updated costs
Stage 4: Technical Design
All construction information is finalised. This includes detailed specifications, Building Regulations submissions, and tender documents. BIM models reach LOD 300-350. This is the last opportunity for design changes.
Deliverables:
- Technical drawings
- Detailed specifications
- Tender packages
Stage 5: Manufacturing and Construction
The building is constructed. Architects administer contracts, monitor quality, and respond to site queries.
Duration:
- Extensions: 6-12 weeks
- New houses: 6-12 months
Stage 6: Handover
The building is completed and handed to the client. Defects are resolved, manuals are provided, and users are trained. Post-occupancy evaluation begins.
Stage 7: Use
This stage covers the building's operational life. Performance is monitored and lessons learned inform future projects.
Typical Project Timescales
House Extension
4-6 months
- Design to planning: 3 months
- Construction: 2-3 months
New Build House
12-18 months
Loft Conversion
20 weeks
(often using Permitted Development rights)
Many practices group stages for clarity:
- Design & Planning (Stages 0-3)
- Technical Design (Stage 4)
- Construction & Completion (Stages 5-7)
Key Changes from 2013
- Mandatory sustainability requirements at each stage
- Full BIM integration
- Stage 7 connects back to Stage 0 for continuous improvement
- Building Safety Act compliance requirements
Practical Application
For Architects:
- Create stage-specific templates
- Define fee proposals by stage deliverables
- Conduct stage reviews before proceeding
For Clients:
- Understand decision points
- Plan budget availability
- Engage consultants at appropriate stages
Recent Developments
RIBA continues to add specialist overlays:
- Smart Buildings
- Inclusive Design
- Enhanced Engagement
Expect further requirements for embodied carbon and biodiversity as regulations develop.
Common Questions
When should planning applications be submitted?
During Stage 3, allowing 8-13 weeks for determination.
Do all projects need every stage?
No. Smaller projects can combine or adapt stages while maintaining core principles.
What changed from the 2013 version?
Primary changes are mandatory sustainability, integrated BIM, and expanded guidance (37 to 143 pages).