How much does an architect cost?
Architects charge a fixed fee, an hourly rate or a percentage of build cost. Estimate a typical project fee below.
How architects charge
- 1Scope of service
Drawings-and-planning only is far cheaper than a full RIBA service that runs to site delivery.
- 2Fixed vs percentage
Smaller domestic jobs are often a fixed fee; larger builds are commonly a percentage of build cost.
- 3Not the only fee
Budget separately for structural engineer, planning application fees and building control.
Architect and other professional fees are the soft costs that appraisals routinely under-count. On any project needing planning or structural change, fold the full design-team fee into the schedule — it's real money and it's needed before a spade goes in the ground.
Architect fees (indicative)
| Service | Basis | Indicative cost |
|---|---|---|
| Concept + planning drawings | fixed | £2,000 – £5,000 |
| + Building regs / tech drawings | fixed | £4,000 – £9,000 |
| Full service to completion | % of build | 7% – 15% |
| Hourly / consultation | per hour | £60 – £120 |
Varies by project size, complexity and how far the architect takes it (planning vs. full delivery).
Frequently asked questions
How much does an architect cost for an extension?+
For a domestic extension, concept and planning drawings typically cost £2,000–£5,000, rising to £4,000–£9,000 with building-regs and technical drawings. A full service to completion is often 7–15% of build cost.
Do I always need an architect?+
Not always — an architectural technologist or a design-and-build contractor can handle simpler projects for less. An architect earns their fee on complex layouts, planning-sensitive sites and design-led flips.
Related tools & guides
Want to know how these figures are calculated? See our cost methodology.
Cost figures shown are indicative estimates, not quotations. You are responsible for verifying all costs (obtain contractor quotes) and any figures submitted to a lender. ScopeWise is a documentation tool, not financial, tax, structural or planning advice. HMO compliance prompts are guidance only — confirm requirements with your local council, as standards and licensing vary by authority.