What Does an Architect Actually Do? Project Stages Explained

Beyond Drawing Plans

Many homeowners assume an architect simply draws plans and submits them to the council. In practice, a good architect acts as designer, project coordinator, and your advocate throughout a building project. Understanding what they deliver at each stage helps you judge whether you are getting value — and where you might choose to handle things yourself.

The RIBA Plan of Work: Stages 0 to 7

The Royal Institute of British Architects structures projects into eight stages. Not every residential project requires all of them, but the framework is widely used across the profession.

Stage 0 – Strategic Definition establishes whether the project is viable. For a homeowner on Hampstead Heath's eastern fringe considering a basement extension, this might involve preliminary conversations about ground conditions, budget realism, and whether the disruption is worthwhile given the property's existing layout.

Stage 1 – Preparation and Briefing formalises your requirements. The architect will visit the property, take measurements or commission a measured survey, and discuss how you use your home. A thorough brief covers spatial needs, budget parameters, programme expectations, and any planning constraints — particularly relevant for properties near the Heath where sight lines and tree preservation orders can restrict what is achievable.

Stage 2 – Concept Design is where the creative work begins. You will typically receive sketch plans, sections, and sometimes 3D visualisations showing how the proposed design responds to your brief. At this stage, options are explored — perhaps comparing a rear extension against a side-return infill, or testing whether a mansard loft delivers enough headroom to justify its cost.

Stage 3 – Spatial Coordination (formerly Developed Design) refines the chosen concept. Room layouts are fixed, structural strategy is coordinated with an engineer, and the design is developed to sufficient detail for a planning application. This is also the point at which material choices begin to crystallise — critical in conservation areas where Camden's officers will scrutinise proposed brick, slate, and fenestration details.

Stage 4 – Technical Design produces the detailed construction drawings and specifications needed for building regulations approval and contractor tendering. These documents define exactly how the building is to be constructed: insulation build-ups, drainage runs, steelwork connections, and window schedules. The quality of Stage 4 documentation directly affects the accuracy of contractor pricing and the number of costly variations during construction.

Stages 5 to 7 – Construction, Handover, and Use cover the build itself. Many residential architects offer contract administration, attending site regularly to review progress, approve work stages, and manage the financial relationship between you and your builder. Others step back after Stage 4, leaving you to manage the build directly or through a project manager.

What Deliverables Should You Expect?

At a minimum, you should receive: a measured survey or verification of existing drawings, design drawings at each stage with clear revision tracking, a planning application package (drawings, design and access statement, heritage statement if applicable), building regulations drawings and specifications, and — if the architect administers the contract — regular site visit reports and financial summaries.

Concept vs Technical Design: Why Both Matter

Homeowners sometimes commission concept-only services to save fees, intending to hand technical drawings to a cheaper provider. This can work, but risks losing design intent in translation. The architect who conceived a carefully proportioned rooflight arrangement for a Dartmouth Park terrace, for example, understands why each element is positioned as it is. A technologist working from sketches alone may not preserve those subtleties.

For more on how architects approach interior spatial planning, Design Hampstead explores the relationship between architecture and interior design. To see how completed projects transform homes in this area, visit Hampstead Transformations.

Your Next Step

If you are preparing to brief an architect, start by documenting how you currently use each room and what frustrations you want to solve. Browse our Hampstead Heath area page for architects experienced with properties in that part of NW3, review our project timeline guide for realistic scheduling expectations, or download our architect brief template to structure your initial conversations.

Architect Hampstead is a matching service operated by Hampstead Renovations Ltd. We are not an architecture practice and do not provide architectural services directly.