Letters of Appointment for Architects: What Should Be in the Agreement

Introduction

Every architect-client relationship should be based on a written appointment agreement that defines the services to be provided, the fees to be paid, and the respective obligations of both parties. Without a written agreement, disputes about what was included in the architect's scope, how much is owed, and what the client is responsible for are significantly harder to resolve. Understanding what an architect appointment agreement must contain helps homeowners make a well-informed appointment and avoid the misunderstandings that can arise from inadequate documentation.

Why Written Appointments Are Essential

The ARB Architects Code (Standard 4) requires architects to establish the terms of the appointment in writing, including the scope of the services, the fee and payment arrangements, the duration of the agreement, and the basis on which either party can terminate. Failure to do so is a breach of the Code. RIBA Chartered Membership similarly requires clear written terms of appointment.

For homeowners, a written appointment provides:

• Certainty about what services are included — and what is not (preventing later disputes about out-of-scope work)
• Clarity about the fee structure and payment schedule — when and how much to pay
• A basis for assessing whether the architect is performing to the agreed standard
• A framework for termination if the relationship breaks down
• Evidence of the parties' agreement if a dispute arises

The RIBA Professional Services Contracts

RIBA publishes a suite of professional services contract forms for architect appointments. The most commonly used for residential projects are:

• RIBA Standard Professional Services Contract 2020: A comprehensive contract form with full terms and conditions, suitable for most residential projects of significant scale
• RIBA Concise Professional Services Contract 2020: A simplified form for smaller or less complex projects
• RIBA Domestic Professional Services Contract 2020: Specifically designed for domestic client appointments, using plain language and including consumer protection provisions

For north London residential projects, the RIBA Domestic Professional Services Contract is typically appropriate. It is designed to comply with consumer contract regulations and provides a clear, accessible basis for the architect-domestic client relationship.

Key Terms to Check in an Appointment Agreement

Scope of Services

The agreement must define exactly what services the architect will provide. The RIBA Plan of Work stages (0–7: Strategic Definition, Preparation and Brief, Concept Design, Spatial Coordination, Technical Design, Manufacturing and Construction, Handover) provide a useful framework. The appointment should specify which stages are included and which are optional or separately priced.

Fee and Payment

The fee structure must be clear: fixed lump sum, percentage of construction cost, time charges, or a hybrid. The payment schedule must specify when invoices are raised and when they are payable. Typical milestones include: on appointment, at planning submission, at planning approval, at tender, at start on site, at practical completion.

Expenses and Disbursements

Are planning fees, structural engineering fees, party wall surveyor fees, printing costs and other disbursements included in the quoted fee, or are they charged at cost in addition? This must be explicit — vague arrangements on disbursements are a frequent source of dispute.

Consultant Co-ordination

Who is responsible for appointing and co-ordinating the structural engineer, MEP engineer, party wall surveyor, and other consultants? Are they sub-consultants to the architect (appointed by the architect, on the architect's liability) or are they direct client appointments (no architect liability for their work)?

Copyright and Licence

The design is the architect's intellectual property. The appointment should specify the licence granted to the client to use the design — typically a non-exclusive licence to use the documents for the specific project. The licence should not be conditional on full payment of all fees (which would prevent the client using the design in the event of a fee dispute).

Termination Provisions

What notice is required for termination? What fees are owed on termination? What documents must the architect provide on termination? See our guide to terminating an architect's appointment for more detail.

Dispute Resolution

The agreement should specify the dispute resolution process — typically negotiation, then mediation, then adjudication (for construction disputes) or arbitration/court proceedings.

Practical Advice for Homeowners

• Never engage an architect on the basis of a verbal agreement or a brief email exchange — insist on a written appointment before any significant work begins
• Read the appointment agreement carefully before signing — particularly the fee and scope sections
• Ask questions about anything that is unclear — a good architect will welcome the opportunity to clarify terms before the relationship starts
• Keep a copy of the signed appointment and all correspondence with the architect throughout the project

Conclusion

A properly documented architect appointment is the foundation of a well-managed project. The RIBA's standard forms provide a balanced, consumer-friendly basis for the relationship that protects both the homeowner and the architect. Taking the time to read, understand, and if necessary negotiate the appointment terms before signing is a small investment of time that can prevent significant difficulties later — particularly on the complex north London residential projects where the stakes are high and the professional services engagement is substantial.