Structural survey: types and when you need one
A structural survey answers a specific question: is this building sound, and if not, why. We match the type of survey to the concern you actually have, for owners, buyers and lenders across the UK.
What is the difference between a structural survey and a home survey?
A RICS home survey is a broad condition report across the whole property by a surveyor. A structural survey by an engineer focuses on stability and load, usually because a defect or movement has been flagged, and it explains cause, significance and the fix with engineering reasoning behind it.
The types of survey and what they cover
People use the phrase structural survey loosely, so it helps to be clear about what each type actually delivers. A visual structural inspection is a walkover by an engineer who looks at the fabric, forms a view on cause and significance, and writes a report. A defect-specific investigation goes deeper on one problem, a bowing wall, a sagging floor, a widening crack, and sets out the mechanism and the fix. A full structural appraisal assesses whether the building or a specific element has adequate capacity, often ahead of alterations, a change of use or a purchase.
This is different from the RICS Home Survey levels that a surveyor provides. A surveyor gives a broad condition report across the whole property. A structural engineer is brought in when a surveyor flags movement, when a lender wants a specialist opinion, or when you already know there is a structural question that needs numbers and a load path behind the answer, not just an observation.
When you actually need one
The common trigger is a home survey that mentions cracking, movement or a defect the surveyor cannot fully resolve, followed by the recommendation to instruct a structural engineer. Buyers use that report to renegotiate or to reassure a nervous lender. Owners commission a survey when a crack has opened up, a floor has started to slope, or a chimney or bay looks to be pulling away, and they want to know whether it is cosmetic or serious before they spend money.
The other trigger is change. Before you remove walls, convert a loft, dig out a basement or take on a building of unknown history, a survey establishes what you are starting from. It is far cheaper to understand the existing structure first than to discover mid-project that a wall you assumed was non-loadbearing is holding up the roof. We carry out these surveys across the UK, and for European clients we combine a site visit with desktop assessment where that suits the property.
How we carry out the survey
We start with the history: age, construction type, any previous underpinning or repairs, tree cover, drainage and the pattern of what has changed and when. On site we look at crack widths and directions, floor levels, verticality of walls, the condition of lintels, bearings and junctions, and any signs of damp or timber decay that undermine the structure. Where the cause is not obvious from the surface, we recommend the next step rather than guess, which may be opening up a section, monitoring, or a trial pit to see the foundation and the ground.
The report explains what we found, what is causing it, whether it is progressive or long finished, and what if anything needs doing. Where the concern is capacity rather than a defect, we run the calculations to the Eurocodes and Approved Document A so the conclusion is backed by numbers a lender, insurer or building control officer will accept.
What we check.
The points our calculations resolve for a project like this.
- Matching the survey type to the actual concern, rather than over or under specifying
- Whether a defect is progressive or long since stabilised
- The load path behind any element you are worried about
- Whether opening up, monitoring or a trial pit is the sensible next step
- What a lender or insurer will need to see in writing
- Coordination with the RICS surveyor's findings where one has already reported
From enquiry to sign-off.
Enquiry
Send drawings or describe the problem. We confirm the scope, the deliverables and a target timescale.
Information
We agree the survey, drawings or data we need and any site access required.
Engineering
Design, calculation or assessment to the relevant Eurocodes and UK National Annex.
Issue
A clear, defensible report or set of calculations, with assumptions and limitations stated.
Common questions
What is the difference between a structural survey and a home survey?
A RICS home survey is a broad condition report across the whole property by a surveyor. A structural survey by an engineer focuses on stability and load, usually because a defect or movement has been flagged, and it explains cause, significance and the fix with engineering reasoning behind it.
Which type of structural survey do I need?
It depends on your concern. A single defect like a crack or sagging floor needs a defect-specific investigation. A worry about capacity before alterations needs an appraisal. A general check of an unfamiliar building needs a visual structural inspection. We help you scope the right one before you commit.
How much does a structural survey cost?
Our structural surveys start agreed as a fixed fee once we know the property and the concern. A focused single-defect inspection sits at the lower end; a wider appraisal with calculations costs more because of the analysis involved.
My mortgage lender wants a structural engineer's report. Can you help?
Yes. Lenders often ask for a specialist report when a home survey mentions movement or cracking. We inspect, set out cause and significance clearly, and state whether remedial work or monitoring is needed, in a form lenders accept.
Do you carry out surveys outside Scotland?
Yes. We work across England, Scotland, Wales and Northern Ireland. Reports and calculations are delivered anywhere, and we arrange site visits by region.
Related in structural assessments & specialist services.
Tell us what you are building.
Send the drawings or describe the project. We confirm scope, deliverables and a realistic timescale.
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