A survey that missed something significant — damp, roof failure, structural movement, Japanese knotweed, a defective extension — is one of the most common professional negligence claims in England and Wales. The claim is real, but it is often smaller than the repair bill, and it turns on evidence you may need to gather now.
What the surveyor had to do
A surveyor owes you a duty to exercise the skill and care of a reasonably competent surveyor in carrying out the service you engaged them for. That standard is applied to the product:
- RICS Home Survey Level 1 — a condition report: a brief visual inspection with traffic-light ratings.
- Level 2 (the former HomeBuyer Report) — a more detailed visual inspection, with advice on defects that may affect value and on repairs. Not intended to include lifting floorboards or moving heavy furniture.
- Level 3 (the former Building Survey) — a thorough inspection of the accessible structure and fabric, with detailed defect analysis and repair advice.
A Level 2 surveyor is not negligent for failing to find what only a Level 3 inspection would reveal. Equally, a surveyor is negligent if a defect was visible, or if there were visible signs that should have prompted a warning or a recommendation for further investigation, and none was given.
A mortgage valuation is different. The valuer acts for the lender. Following Smith v Eric S Bush (1990), a valuer of a modest home may still owe the buyer a duty, but the scope is limited to what a valuation involves.
What you can recover
This is where most people's expectations need adjusting. The measure of damages for a negligent survey, settled in Watts v Morrow (1991), is the diminution in value: the difference between the price you paid and the property's true market value with the defect, at the date of purchase. It is not the cost of repair.
Sometimes those figures are similar. Often they are not — a £40,000 roof replacement may reduce the value of a property by considerably less, because a buyer would have negotiated rather than walked away. A retrospective valuation by an independent surveyor is the evidence that fixes this number.
You may also recover consequential losses that flow directly from the negligence — for example alternative accommodation while urgent works are done — and a modest sum for distress and inconvenience where the defect has affected your enjoyment of your home.
Evidence you need
- The survey report itself, with the terms of engagement and the level of survey.
- Photographs of the defect as found, and if possible of the same areas as they were at the time of the survey (marketing photographs and the surveyor's own photographs help).
- An independent report from another surveyor identifying the defect, when it was likely to have been present, and whether it should have been apparent on the level of inspection you paid for.
- Repair quotes and any invoices for work already done.
- A retrospective valuation of the property with the defect, at the date you bought it.
- Any correspondence with the surveyor since, including a complaint and their response.
Time limits
You generally have six years from the date of the negligent survey (s.2 Limitation Act 1980), or if later three years from the date you first knew — or could reasonably have known — the material facts (s.14A), subject to a 15-year longstop. The date of knowledge is often argued about: a damp patch you noticed and ignored may start the clock earlier than the date you got a builder's diagnosis. Note the date you first became aware of the problem, and any earlier warning signs, honestly.
The professional negligence pre-action protocol
Surveyor claims follow the Professional Negligence Pre-Action Protocol. In outline: a preliminary notice to the surveyor (which puts their insurer on notice), a detailed letter of claim, a three-month window for the surveyor's letter of response or settlement, and an obligation on both sides to consider ADR. Surveyors carry compulsory professional indemnity insurance under RICS rules, which is why these claims are usually paid.
Most claims settle within the protocol. The RICS also runs a dispute resolution service, and the surveyor's own complaints procedure and any ombudsman scheme they belong to are worth using first for smaller sums.
What a solicitor will want from you
- Survey report, engagement terms, and the level of survey.
- Purchase price, completion date, and the date you first noticed the problem.
- The independent surveyor's report and any repair quotes.
- Your complaint to the surveyor and their reply.
- A realistic view of the value drop, not just the repair cost.
This guide is general information about the law of England and Wales. It is not legal advice. CasePoint does not cover personal injury claims, including injury caused by a building defect.
Frequently asked
Can I recover the cost of repairs from a negligent surveyor?
Usually not as such. The normal measure of damages is the difference between what you paid for the property and what it was actually worth with the defect at the date of purchase — the diminution in value. Repair costs are evidence of that, but not the same thing. In some cases the two figures are close; in others they are far apart.
Does it matter which survey I had?
Yes. A mortgage valuation is for the lender, and the valuer's duty to you is limited. A RICS Home Survey Level 2 or Level 3 is a service to you, with a defined scope. What the surveyor should have found depends on which product you paid for and what a reasonably competent surveyor would have seen on a visual inspection of that scope.
Next step
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