If you're buying a home — especially an older one — you've probably been told you need a survey. But what exactly is a building survey, and is it the same as a structural survey? Let's break it down without the jargon.
The short answer
A building survey (officially called a Level 3 Home Survey) is the most detailed type of property survey you can get. A qualified surveyor inspects every accessible part of the building — roof, walls, floors, windows, drainage, services — and gives you a thorough written report on what they find.
It covers defects, their likely causes, how serious they are, and what you should probably do about them. Think of it as a full health check for the property.
Is a building survey the same as a structural survey?
You'll hear both terms used — sometimes interchangeably — and it creates a lot of confusion. Here's the honest answer: they're closely related but not identical.
- A building survey looks at the whole property — structure, fabric, services, and condition.
- A structural survey or structural inspection focuses specifically on the load-bearing elements: foundations, walls, beams, and roof structure.
In practice, a Level 3 building survey will include structural observations as part of its scope. If a surveyor spots something that needs a specialist structural opinion, they'll flag it in the report and recommend you instruct a structural engineer for a more technical assessment.
💡 A good rule of thumb: start with a building survey. If it raises structural concerns, follow up with a structural engineer's report.
What does a building survey actually cover?
A thorough building survey will inspect and report on:
- The roof structure, covering, flashings, gutters and chimneys
- External walls, pointing, render, cladding and below-ground structure
- Internal walls, ceilings, and floors (including signs of movement or sagging)
- Windows, doors, and joinery
- Damp — rising, penetrating, and condensation
- Signs of subsidence or structural movement
- Services including heating, electrics, plumbing (visual inspection only)
- Outbuildings, garages, boundaries and grounds
The report will flag each issue using a clear condition rating — so you can quickly see what needs urgent attention, what needs monitoring, and what's simply cosmetic.
Who actually needs a building survey?
Not every buyer needs a full Level 3 building survey. Here's a quick guide:
- Modern property in good condition? A HomeBuyer Report (Level 2) is probably sufficient.
- Victorian, Edwardian, or inter-war property? A building survey is strongly recommended.
- Extended, converted, or altered property? Go for the building survey — alterations can hide problems.
- Planning significant renovation? A building survey helps you understand what you're taking on before you buy.
- Unusual construction (timber frame, thatched roof, listed building)? Always a building survey.
If you're buying in South East London — where much of the housing stock is Victorian and Edwardian terraces — a Level 3 survey is often the smarter investment, even if the property looks fine from the outside.
Building survey vs structural inspection: do you ever need both?
Yes, sometimes. If a building survey identifies a specific structural concern — significant cracking, suspected subsidence, a poorly supported loft conversion — the surveyor will recommend a specialist structural engineering inspection. This is a more technical report that gives you engineering-level analysis, calculations, and definitive advice on remediation.
At SurveyCORE, we offer both services, so if your building survey raises structural questions we can follow up without you needing to find a different firm.
How long does a building survey take?
The inspection itself typically takes between 2 and 4 hours on site depending on the size of the property. You'll receive the written report within 2 working days of the visit. We aim to book inspections within 3–5 working days of instruction — so you're rarely waiting more than a week from first contact to having the report in your hands.
📋 Ready to book a building survey in South East London? Get a fixed-fee quote from SurveyCORE — we cover Bromley, Beckenham, Croydon, Lewisham and beyond.
Frequently asked questions
Do I need to be present during the survey?
You don't have to be, but it can be helpful. Surveyors can arrange access directly with the estate agent or vendor. Some clients like to attend at the end to ask questions — that's absolutely fine.
Will the surveyor tell me if I shouldn't buy?
A surveyor's job is to give you an accurate picture of the property, not to tell you whether to buy. But a good report will give you everything you need to make that decision yourself — or to go back and renegotiate the price.
Can a building survey be used to renegotiate the price?
Absolutely — and this is one of the most valuable uses of a survey. If the report identifies significant defects with estimated repair costs, you have a solid, professional basis to go back to the seller and negotiate a reduction.