Costs guide
How Much Does a Structural Engineer's Report Cost?
Updated 23 July 2026
A structural engineer's report on a specific defect, a crack, a bowing wall, a sagging roofline, costs around £250 to £500 in 2026. A full structural inspection of the whole building runs £500 to £1,500 or more depending on size and complexity. It is a different product from a RICS survey: the engineer diagnoses a particular structural problem and specifies the fix, which is exactly what lenders want when a valuation flags movement.
Structural engineer costs (UK, 2026)
| Service | Typical cost | When you need it |
|---|---|---|
| Specific defect inspection | £250 to £500 | Survey or valuation flags cracking / movement |
| Full structural inspection | £500 to £1,500+ | Serious or multiple concerns, unusual buildings |
| Structural calculations | £150 to £500 | For planned alterations (wall removal etc.) |
| Monitoring (crack gauges) | £200 to £600 | Where movement must be watched over months |
RICS survey vs structural engineer: who does what
A RICS Level 2 or 3 survey is a broad health check: the surveyor inspects everything and flags concerns. A structural engineer is the specialist the surveyor refers you to when something structural needs a diagnosis, typically cracking, subsidence, altered load-bearing walls or roof spread.
Lenders treat the two differently. If a mortgage valuation notes "evidence of structural movement", the lender will usually ask for a structural engineer's report specifically, and may retain funds until it is produced. A second RICS survey does not answer that question.
What the report gives you
- A diagnosis: whether the movement is historic and stable or active and progressive, the single most important fact for the purchase.
- A specified remedy with indicative costs, from repointing (hundreds of pounds) to underpinning (£10,000 to £50,000+).
- A document lenders and insurers accept, which a builder's opinion is not.
- Ammunition for renegotiation: a priced structural defect is the strongest price-reduction evidence there is.
Is it worth it on an older property?
On pre-war housing stock, some historic movement is close to universal, and a good engineer will say so plainly rather than alarm you. The £250 to £500 fee answers the question a survey can only raise, and either clears the way to buy with confidence or hands you a documented reason to pay less. Against a five- or six-figure repair risk, it is one of the cheapest pieces of professional advice in the whole purchase.
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Frequently asked questions
How much does a structural engineer cost for a house purchase?
For a purchase, most buyers need a specific defect inspection at £250 to £500 in 2026. A full structural inspection of the whole property costs £500 to £1,500 or more. Prices vary with property size, age and how far the engineer travels.
Do I need a structural engineer or a surveyor?
Start with a RICS survey. If it, or the lender's valuation, flags structural movement, then instruct a structural engineer for that specific issue. The engineer's report is what lenders require to release a retention; another general survey will not satisfy them.
What does 'evidence of movement' on a valuation mean for my mortgage?
It usually means the lender wants a structural engineer's report before confirming the full advance, sometimes holding back money in a retention. If the engineer confirms the movement is historic and stable, lending normally proceeds; if active, the lender may require repairs first.
Is subsidence always a deal-breaker?
No. Historic, stabilised subsidence with documentation is common and mortgageable, though insurance costs more. Active subsidence is the serious case: underpinning can cost £10,000 to £50,000+, so either the price reflects it or you walk away.
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