House Survey Guide — Which Survey Do You Need?
A house survey is one of the best investments you can make when buying a property. It could save you thousands by uncovering hidden problems before you commit. But which type do you need, and what should you do with the results?
A Survey Is Not a Valuation
Your mortgage lender will do a valuation to check the property is worth what you are paying. This is for their benefit, not yours. A survey is a detailed inspection of the property’s condition and is for your protection. They are completely different things.
The Three Levels of Survey
Level 1 — Condition Report
£300 – £500
Best for: New-build properties and modern homes in visibly good condition.
What it covers: A basic visual inspection using a traffic-light system (green, amber, red) to flag each element. No advice on repairs, no valuation.
Verdict: The cheapest but least useful option. Most surveyors recommend going straight to Level 2.
Level 2 — Homebuyer Report
£400 – £700
Best for: Conventional properties built after 1900 in reasonable condition. This is the most popular survey and the one most buyers should get.
What it covers: A detailed visual inspection identifying significant defects, damp, subsidence, roof condition, and timber issues. Includes advice on repairs and maintenance. Uses traffic lights plus written commentary.
Verdict: Best value for most home buyers. Gives you enough detail to make an informed decision and negotiate on price.
Level 3 — Building Survey
£600 – £1,500
Best for: Older properties (pre-1900), unusual construction (timber frame, thatched, listed buildings), heavily altered properties, or any property where you plan major renovation.
What it covers: The most comprehensive survey. Inspects loft space, under floors where possible, outbuildings, and the overall structure. Includes detailed defect descriptions, causes, recommended repairs, and estimated costs.
Verdict: Essential for older or unusual properties. The extra cost could save you tens of thousands. Always get a Level 3 if the property is pre-1930.
Quick Comparison
| Feature | Level 1 | Level 2 | Level 3 |
|---|---|---|---|
| Cost | £300–500 | £400–700 | £600–1,500 |
| Defect advice | No | Yes | Detailed |
| Repair costs | No | No | Yes |
| Loft inspection | No | Limited | Yes |
| Best for | New builds | Most homes | Old / complex |
What Problems Do Surveys Find?
Damp
Rising damp, penetrating damp, or condensation. Treatment costs £500 – £5,000 depending on severity.
Subsidence
Cracking caused by ground movement. Can cost £5,000 – £50,000+ to fix. May make the property unmortgageable.
Roof problems
Missing tiles, sagging ridge, failing felt. A new roof costs £5,000 – £15,000.
Japanese knotweed
Invasive plant that damages foundations. Treatment plans cost £2,000 – £10,000. Most lenders refuse mortgages until treated.
Asbestos
Common in properties built before 1990. Safe if undisturbed but removal costs £1,000 – £5,000+ per area.
Electrical issues
Outdated wiring, no earth bonding. A full rewire costs £3,000 – £8,000 for a 3-bed house.
What to Do If Problems Are Found
- Do not panic. Most surveys find something. That is the whole point. Minor issues are normal on any property that is not brand new.
- Get quotes for repairs. The survey identifies problems; you then get tradespeople to quote for fixing them.
- Renegotiate the price. Use the repair costs to negotiate a reduction. Sellers expect this. A £5,000 roof repair justifies a £5,000 price reduction.
- Ask the seller to fix it. Sometimes it is easier to ask the seller to complete repairs before exchange, especially if the issue affects mortgageability.
- Walk away if needed. If the survey reveals something catastrophic (serious subsidence, major structural failure), it is better to lose your survey fee than buy a money pit.
How to Find a Good Surveyor
Use a surveyor who is a member of RICS (Royal Institution of Chartered Surveyors). They are regulated, insured, and follow professional standards. Check reviews, ask for recommendations, and choose someone with experience of the property type you are buying.
Cost-saving tip: Some surveyors offer a combined valuation and survey, which is cheaper than getting them separately. Ask before booking.
Factor survey costs into your buying budget. Use our Mortgage Calculator on CalcPad to plan your total purchase costs.
Last updated May 2026. This guide is for general information only. Always commission a survey from a qualified RICS surveyor.