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Estimate Your Architect Fees
4 steps. Designer or ARB architect fee only — the council's planning fee, measured survey and structural calcs are charged separately.
Methodology
How This Calculator Works
We combine project type with the service level you need, then apply a regional labour multiplier from 2026 UK architect and CIAT-technologist fee scales.
Internal remodel — £1,300 base · Garage/cons. — £1,100 base
New-build house — £4,000 base (highly variable)
Planning only ×1.00 · Full plans ×1.85 · Full service ×3.20
Designer/architect fee only. A qualified architectural designer or CIAT technologist can often do the drawings for 20–40% less than an ARB-registered architect.
Regional Multipliers
London 1.28× · South East 1.14× · South West 1.05×
East of England 1.08× · Midlands 1.00× (baseline)
North West 0.93× · North / Yorkshire 0.92×
Wales 0.94× · Scotland 0.96× · NI 0.88×
Low/high band is ±20% around the mid estimate. A firm price follows a site survey.
Typical Architect Fees (2026)
Designer or ARB-architect fee by service level, Midlands baseline (±15% band).
Service
Typical 2026 fee
Notes
Planning drawings only
£1,200–£2,500
Concept + planning app
Full plans (planning + building regs)
£2,500–£5,000
Most common package
Full architect service
£4,000–£12,000+
Concept to completion (often 7–15% of build)
These figures power the calculator above — enter your own spec for a tailored estimate. For the full breakdown, read our complete cost guide.
Frequently Asked Questions
How much does an architect cost in 2026?
Planning drawings for an extension typically cost £1,200–£2,500 in 2026, a full plans-and-building-regs package £2,500–£5,000, and a full architect service £4,000–£12,000+ (often 7–15% of the build cost). London and the South East run 20–40% higher.
Is an architectural designer cheaper than an architect?
Usually yes — a qualified architectural designer or technologist (CIAT) can prepare extension drawings and planning applications for 20–40% less than an ARB-registered architect. Only someone on the ARB register may legally call themselves an 'architect'; for a straightforward extension a designer is often all you need.
Does the estimate include the planning fee?
No. This is the designer's or architect's fee only. The council's statutory planning fee (around £258 for a householder application in England), a measured survey (£300–£600) and structural engineer's calculations (£400–£1,000) are paid separately.
What is the difference between planning drawings and full plans?
Planning drawings show the council what you want to build; full plans add the technical building-regulations drawings your builder constructs from. Most projects need both — a 'full plans' package bundles them and is the most common homeowner purchase.
Do I need an architect for a small extension?
Not necessarily. Many extensions are permitted development and need no planning application, and a designer or technologist can produce the drawings. A full ARB-registered architect adds the most value on complex, bespoke or high-value projects.
How accurate is this architect cost calculator?
It gives a guide from 2026 UK fee levels for the project type and service stage you pick, not a fixed quote. Actual fees depend on project value, design complexity, how many stages you need and whether the site is constrained. An architect confirms the fee after discussing your brief and seeing the property.
What does the architect estimate include and exclude?
The figure covers design work for the stages you select, typically concept, planning drawings and technical detailing. It excludes the local authority planning fee, structural engineer, party-wall surveyor, planning consultant, measured survey and Building Control charges. A percentage-of-cost or fixed-fee basis changes the total, so confirm the scope in the architect's written proposal.
Why might an architect quote more than the estimate?
The calculator assumes a standard residential job. In practice, fees rise for listed buildings, conservation areas, complex or sloping sites, multiple design revisions, planning appeals and full-service appointments through to site inspections. London practices typically charge more, and percentage fees scale with build cost, so use the figure as a starting point before requesting proposals.
Reviewed by the BestBuilders editorial team on 2 July 2026. Fees reflect 2026 UK ranges for architectural designers, technologists and ARB-registered architects across project types and regions, cross-checked against published fee guides. This calculator gives a budgeting estimate, not a quote · Next scheduled review: October 2026 · See our editorial standards.
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