Architect Agreement (UK)

An Architect Agreement in the United Kingdom is a legally binding written instrument.

The title 'architect' is protected by statute in the United Kingdom under the Architects Act 1997. Only individuals registered with the Architects Registration Board (ARB) may use the title. The ARB maintains a publicly accessible register of all registered architects, which the public can search online. The ARB's Architects Code: Standards of Professional Conduct and Practice (2017) imposes obligations on registered architects, including the obligation to have written terms of engagement in place before undertaking any project. An architect who takes on a project without written terms risks disciplinary action by the ARB.

The Royal Institute of British Architects (RIBA) publishes the Standard Professional Services Contract and a range of other contract forms that set the industry benchmark for architect agreements in the UK. The RIBA Plan of Work 2020 (most recently updated in 2024) organises the design and construction process into eight stages: Stage 0 (Strategic Definition), Stage 1 (Preparation and Briefing), Stage 2 (Concept Design), Stage 3 (Spatial Coordination), Stage 4 (Technical Design), Stage 5 (Manufacturing and Construction), Stage 6 (Handover), and Stage 7 (Use). An architect agreement typically defines the scope of services by reference to these stages, making clear which stages are within the agreed engagement.

The Copyright, Designs and Patents Act 1988 (CDPA 1988) grants copyright protection to original architectural drawings, plans, and artistic works (which include models and designs). Under section 4 of the CDPA 1988, an architect's drawings are artistic works and protected by copyright from creation. Section 11(1) makes the architect (or their employer if employed) the first owner of the copyright. Under section 51 of the CDPA 1988, the copyright in design documents does not restrict the construction of a building from those documents — but the client's right to build from the drawings depends on the licence granted in the architect's agreement.

Professional indemnity insurance (PII) is mandatory for all registered architects under the ARB Code. PII covers claims arising from negligent professional advice, design errors, or breaches of duty. The policy typically operates on a claims-made basis, meaning the policy in force at the time the claim is made (not at the time the alleged error was committed) responds. The architect agreement should specify the minimum PII cover level and require the architect to maintain it for a defined period after project completion.

A UK Architect Agreement is needed at the start of any project where a registered architect is commissioned to provide professional architectural services, whether for a domestic extension, a new residential development, a commercial building, or a public sector project.

Homeowners commissioning an architect for a domestic extension, loft conversion, or new build in England need a written agreement before design work begins. The Planning Portal and local planning authorities across England process planning applications that rely on architectural drawings; without clear ownership and licence provisions in the agreement, the homeowner may face difficulties if the architect withdraws cooperation.

Property developers acquiring sites for residential or commercial development need an architect agreement that covers the full RIBA Plan of Work stages from feasibility (Stage 0) through to planning consent (Stage 3) and, if required, technical design and construction administration (Stages 4 and 5). The agreement should address the appointment of specialist subconsultants (structural engineers, M&E engineers) and the architect's role in coordinating them.

Public sector clients — including NHS trusts, local authorities, and central government departments — must comply with the Government's Construction Playbook and Public Contracts Regulations 2015 (PCR 2015) when procuring architectural services above OJEU thresholds. Public sector architect agreements must address public sector specific requirements including Freedom of Information Act 2000 obligations, the Public Sector Equality Duty under the Equality Act 2010, and Building Information Modelling (BIM) requirements at Level 2.

Historic England and local planning authorities require Heritage Impact Assessments and Conservation Area Appraisals for projects affecting listed buildings or buildings in conservation areas under the Planning (Listed Buildings and Conservation Areas) Act 1990. An architect specialising in heritage work should have an agreement that addresses the specific services and fees for heritage planning work.

Clients who require an architect to act as Principal Designer under the Construction (Design and Management) Regulations 2015 (CDM Regulations) need an agreement that specifically appoints the architect to this statutory role and defines their responsibilities under the CDM Regulations.

A UK Architect Agreement should contain the following key provisions to comply with the ARB Code, the RIBA standard contract conventions, and English law.

Identification of parties and project confirms the client's and architect's full names, the architect's ARB registration number (which clients should verify on the ARB register), the RIBA membership number if applicable, the project address, and a brief description of the proposed works. The ARB registration number gives the client certainty that they are engaging a properly registered professional.

Scope of services and RIBA stages defines precisely which stages of the RIBA Plan of Work 2020 the architect is engaged to perform. The agreement should state whether the engagement is for design services only (Stages 0–3, through planning consent), or whether it extends to technical design (Stage 4) and construction administration (Stage 5). Each stage's deliverables should be listed — for example, planning drawings, structural coordination drawings, schedules of work, site visit reports.

Fees and payment terms set out whether fees are calculated as a percentage of the construction cost, a lump sum, an hourly rate, or a combination. The RIBA recommends that fee proposals reflect the complexity and time required for the project. The agreement should specify when fees are invoiced (typically at the end of each RIBA stage or monthly), the payment period (typically 14 to 30 days from invoice), and the consequences of late payment under the Late Payment of Commercial Debts (Interest) Act 1998.

Intellectual property and copyright provisions address ownership of the drawings and the client's right to build from them. Under section 11 of the Copyright, Designs and Patents Act 1988, the architect retains copyright unless it is expressly assigned. Most RIBA contract forms grant the client a licence to use the drawings for the specific project, conditional on full payment of fees. If the client wants to own the copyright outright (for example, to use the same design for multiple units), a separate written copyright assignment is required.

Professional indemnity insurance confirmation requires the architect to maintain adequate PII and to provide evidence of the current policy on request. The agreement should specify the minimum cover level (typically £250,000 to £5,000,000 depending on project value and risk), and require the architect to notify the client immediately if the PII lapses or changes materially.

Planning and regulatory compliance obligations confirm the architect's role in obtaining planning permission under the Town and Country Planning Act 1990, Building Regulations approval under the Building Regulations 2010, and any other consents (listed building consent, conservation area consent) required for the project. The agreement should confirm that the architect's obligation is to prepare competent applications, not to guarantee the outcome of the planning process.

Termination provisions address the circumstances in which either party may terminate the engagement, the notice required, and the fees payable for work completed to the termination date. The client's right to terminate for convenience and the architect's right to suspend for non-payment should both be addressed. The forms-legal.com Architect Agreement (UK) template covers the mandatory elements under Companies Act 2006.