Architect Fees UK: What You Should Actually Pay in 2026
Architect fees are one of the most confusing costs in a home extension project. Traditional architects charge 8–15% of the build cost, but there are cheaper routes that deliver professional results. This guide explains all the options.
Cost breakdown
Traditional architect fees
A RIBA-chartered architect typically charges 8–15% of the build cost for a full service (concept through to completion). For a £60,000 extension, that is £4,800–£9,000. This covers concept design, planning drawings, Building Regulations, tender documentation, and site visits during construction.
Architectural technologist fees
Architectural technologists (not architects, but qualified designers) typically charge 5–10% or fixed fees. They specialise in the technical side — planning drawings, Building Regulations, structural coordination. Many homeowners find this is all they need.
Project-specific design services
Services like PlanBuild charge for what you actually need, starting with the Layout Ideas Pack, done remotely or in person. Drawings, planning applications, structural calculations, and Building Regulations drawings are priced after that. You know what the pack costs before you start, and you only buy what you need.
What to look for
Choose based on what you need. If you want a bespoke architectural vision and can afford 8–15%, hire an architect. If you want professional plans at a predictable cost, a project-specific service delivers the same technical output for a fraction of the fee.
| Service | Fee Structure | Typical Cost (£60k build) |
|---|---|---|
| RIBA architect (full service) | 8–15% of build | £4,800–£9,000 |
| Architectural technologist | 5–10% or fixed | £3,000–£6,000 |
| PlanBuild (design to planning) | Project-specific pricing | Priced after the survey |
| Online plan drawing service | Project-specific pricing | £500–£2,000 |
| Self-drawn plans | Your time | £0 (but risks) |
Prices based on Dorset rates, 2026
Frequently asked questions
Local cost guides
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