Appointing an Architect for a London Renovation: Scope, Fees, and Getting the Relationship Right

What Architects Actually Do

The public perception of an architect as someone who designs beautiful buildings is not wrong, but it is incomplete. In a residential renovation context, the architect's role encompasses:

Design: Developing the spatial, material, and aesthetic concept for the project — the arrangement of rooms, the opening of new spaces, the design of extensions and alterations, and the resolution of internal finishes and details.

Technical design: Producing drawings and specifications sufficient for a contractor to build from — structural coordinating drawings (working with the structural engineer), services coordinating drawings (working with the M&E engineer), and detailed drawings of junctions, finishes, and bespoke elements.

Planning and building regulations: Preparing and submitting planning applications, listed building consent applications, and building regulations applications; coordinating with the planning authority and building control; managing conditions and approvals.

Procurement: Preparing tender documents (drawings, specifications, possibly a schedule of works or BoQ with the QS), managing the tender process, and advising the client on contractor selection.

Contract administration: Issuing architect's instructions (AIs) for variations, certifying monthly valuations, issuing practical completion and making good of defects certificates, and administering the building contract through to final account.

Not all architects offer all of these services, and some clients choose to split the services — for example, engaging an architect for design and planning but using a project manager for procurement and contract administration. Understanding which services are included in the appointment, and what is excluded, prevents misalignment of expectations.

RIBA Plan of Work and Fee Structures

The RIBA Plan of Work divides a project into eight stages (0–7), from strategic definition through use. For a residential renovation, the relevant stages are typically:

• —Stage 1 (Preparation and Planning): Brief development, site appraisal, feasibility
• —Stage 2 (Concept Design): Initial design proposals, planning pre-application if required
• —Stage 3 (Spatial Coordination): Developed design, planning application, structural and services coordination
• —Stage 4 (Technical Design): Detailed construction drawings and specifications for tender
• —Stage 5 (Manufacturing and Construction): Contract administration during construction
• —Stage 6 (Handover): Practical completion, snagging, O&M documentation

Fee structures: Architectural fees for residential work are typically quoted as:

• —Percentage of construction cost: The traditional approach, typically 8–15% of construction cost for a full residential service in London. For a £1m construction project, this equates to £80,000–£150,000 in architect's fees. The percentage varies with project complexity, scale, and the extent of services included.
• —Lump sum by stage: A fixed fee for each RIBA stage, agreed before the stage begins. Provides more certainty for the client; requires the architect to carefully estimate the work involved at each stage.
• —Time charge: Fees calculated at an hourly or daily rate. Appropriate for early-stage feasibility work, for variation-heavy projects, or for projects where the scope cannot be defined in advance. The client carries the risk of scope growth under time-charge arrangements.

For a prime London renovation, a lump-sum fee with an agreed hourly rate for additional services (changes beyond the agreed scope, additional site visits, additional drawings) is the most transparent and manageable arrangement.

How to Find the Right Architect

The architect selection process should be treated as a professional appointment, not a commercial transaction. The key selection criteria are:

Relevant experience: Has the architect previously designed or overseen renovations of properties of a similar type (Georgian townhouse, Victorian terrace, contemporary apartment), scale, and value in London? Experience of listed building consent, conservation area work, or basement projects — whichever are relevant to the specific commission — is particularly important. Ask to see completed projects of a directly comparable type, not just the architect's most prestigious showcase work.

Design quality: Review the architect's portfolio with the specific project in mind. The aesthetic sensibility expressed in their portfolio should be broadly compatible with the client's aspirations for the project. An architect whose portfolio is exclusively contemporary minimalist may not be the right choice for a client who wants a carefully restored period interior with traditional details.

Project management capability: In a major renovation, the architect's project management capability — their ability to produce coordinated drawings on time, to manage the contractor relationship effectively, and to administer the contract correctly — is as important as their design ability. A beautifully designed scheme that is poorly administered on site produces an expensive and frustrating result. Ask about the architect's team structure, who will be on site during construction, and how variations are managed.

Communication and client relationship: The architect-client relationship is intensive and long-lasting — a major renovation typically spans 2–4 years from initial appointment to completion. The architect must be someone the client can communicate with clearly, whose judgement they can trust, and who will represent their interests effectively throughout the project.

The Appointment Process

Initial approaches: Contact three to five architects whose portfolios suggest a relevant fit with the project. A brief introductory meeting (30–45 minutes) allows both parties to assess fit before investing in a more detailed scope discussion.

Detailed brief and fee proposals: Provide each shortlisted architect with a written brief (describing the property, the scope of works envisaged, the programme, and the budget) and request a written fee proposal. The fee proposal should set out the scope of services, the fee by stage, the exclusions, the hourly rates for additional services, and the key assumptions on which the fee is based.

Appointment document: The appointment should be formalised in writing using the RIBA Standard Agreement for the Appointment of an Architect (RIBA Standard Professional Services Contract, or the Small Project equivalent for simpler projects). This document sets out the scope of services, the fee, the programme, the client's obligations, and the dispute resolution mechanism. Do not proceed on the basis of a letter or email alone — the RIBA contract provides both parties with a clear and well-tested framework.

Professional indemnity insurance: Confirm that the architect holds professional indemnity insurance at a level appropriate to the project value (minimum £1m for residential projects; £2m or more for projects above £2m in construction value). Professional indemnity insurance covers claims arising from design errors and professional negligence; it is a fundamental requirement of a professional appointment.

Common Appointment Mistakes

Appointing on price alone: The cheapest architectural fee proposal may reflect a reduced scope of services (fewer site visits, less detailed drawings, no contract administration) or a less experienced team. The cost of rectifying design errors or inadequate contract administration on site invariably exceeds the fee saving from a cheaper appointment.

Failing to agree scope clearly: Ambiguity about what is and is not included in the fee is the most common source of architect-client disputes. The scope should be explicit: how many site visits per month, whether the fee includes listed building consent drawings as well as planning application drawings, who coordinates the structural and M&E engineers, and what the process is for instructing additional work.

Appointing too late: The architect should be appointed before any planning pre-application advice is sought and before any detailed structural or services investigations are commissioned. Early appointment allows the architect to coordinate all design inputs from the outset rather than trying to integrate consultant work that has been commissioned independently.