Structural Engineer Cost UK 2026

A structural engineer's calculation for a typical UK home in 2026 costs £350–£800 for a single opening, £700–£1,500 for an extension or loft conversion design. Always commission before work starts.

Quick answer

Typical UK price range: £250–£1,500. Typical time: 1–3 weeks.

Free calculator

Cutting walls calculator

Adjust the inputs to get an instant 2026 UK price estimate.

Job type Remove load-bearing wall Remove partition wall Knock through (2 rooms) Open plan kitchen-diner Single RSJ only

Region London South East South West Midlands North of England Scotland Wales Northern Ireland

Specification level Basic / standard Mid-range Premium / high-end

Extras

Structural engineer fee £350–£800 Building control £250–£600 Make-good plastering £600–£1,500 Flooring make-good £400–£1,200 Localised rewire £350–£900

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Estimate only. Prices reflect 2026 UK market data — get quotes from local tradespeople for accurate pricing.

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Budget Under £5,000 £5,000 – £15,000 £15,000 – £30,000 £30,000 – £60,000 £60,000+ Not sure

Timeline As soon as possible 1 – 3 months 3 – 6 months 6+ months Just researching

Project details

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Key points

• Single wall opening: £350–£800
• Loft conversion: £600–£1,200
• Extension structural design: £900–£1,500
• Site visit + calcs typically 2–3 hours' work

Cost breakdown

Item	Low	High
Site visit	£150	£300
Single beam calcs	£200	£500
Full extension design	£600	£1,500
Foundation design	£300	£800

Cost by UK region

Region	Typical cost
London	£1,181
South East	£1,093
South West	£962
Midlands	£875
North England	£787
Scotland	£831
Wales	£787

How to save money

• Always use an IStructE or ICE member
• Ask for the calcs in PDF for building control submission
• Some engineers offer combined "design + check" service — usually cheaper

How to find a trusted tradesperson

Get at least 3 quotes from vetted UK trade networks:

• Checkatrade
• MyBuilder
• Bark

FAQs

Do I always need a structural engineer?

Yes for any load-bearing wall removal, RSJ, foundations, extension or loft conversion. Required by building regulations.

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Disclaimer: Prices are guide ranges based on 2026 UK market data. Get quotes from local tradespeople for accurate pricing.