The pre-action stage of a surveyor claim has a shape, and knowing it takes some of the anxiety out of the insurer's first letter. This guide picks up where the professional negligence pre-action protocol leaves off: at the moment the surveyor's side responds.
The timetable, briefly
Under the Professional Negligence Pre-Action Protocol your solicitor sends a preliminary notice as soon as a claim is contemplated, which puts the surveyor and their insurer on notice. When the claim is ready — expert evidence in hand — a detailed letter of claim follows. The surveyor's side must acknowledge it within 21 days, and then has three months from acknowledgment to send a letter of response, a letter of settlement, or both.
The letter of response is the first time you will see the case against you set out properly. It is almost always written by the insurer's solicitors.
What the letter of response will say
Read it for these arguments; most surveyor responses contain several.
Scope. "The survey was a Level 2 inspection. The [rear roof slope / sub-floor / flat roof] was not accessible and the report said so." Check the report. If it did say so, and recommended further inspection, this is a real defence. If it described the element without recording the limit, it is not.
Caveats and recommendations. "The report recommended a specialist damp and timber survey, which the claimant did not obtain." If true, expect an argument on causation and contributory negligence. Your answer is how clearly the recommendation was made and whether a reasonable buyer would have acted on it.
Not present, or not visible. "There is no evidence the defect existed, or was visible, at the date of inspection." This is where your independent surveyor's report does its work. A response that does not engage with that report, and simply asserts the point, is weaker than it looks.
Causation. "The claimant would have proceeded with the purchase at the same price in any event." Buyers who were in a hurry, or who had already exchanged, sometimes face this; evidence of what you would actually have done — negotiated, investigated, withdrawn — matters.
Measure of loss. "The claimant's loss is the diminution in value, not the cost of repair, and the claimant has provided no valuation evidence." Correct as a statement of law; see diminution in value. If you have a retrospective valuation, the argument becomes a dispute between valuers, which is normal.
Limitation. "The claim is statute-barred." Your date-of-knowledge evidence answers this; see Am I too late?.
Betterment and mitigation. "The works carried out exceed what was necessary" or "the claimant allowed the defect to worsen." Keep the repair scope proportionate and the timeline documented.
The letter of settlement and offers
The response may be accompanied, or followed, by a letter of settlement: an offer, usually without admitting liability. Two kinds of offer matter.
An ordinary without prejudice offer can be accepted, rejected or negotiated with no cost consequences beyond the negotiation itself.
A Part 36 offer is different. Made under Part 36 of the Civil Procedure Rules, it is open for at least 21 days, and if you reject it and then fail to do better at trial, you will usually be ordered to pay the other side's costs from the end of that period, with interest. Insurers use Part 36 precisely because it puts pressure on claimants. It is not a reason to accept a poor offer; it is a reason to take advice on where your evidence realistically puts the value of the claim. You can make Part 36 offers too, with mirror-image consequences for the insurer.
ADR: mediation and the RICS route
The protocol requires both sides to consider alternative dispute resolution after the letter of response, and a party that unreasonably refuses can be penalised in costs later even if it wins. For surveyor claims, mediation is the usual route: a day with an independent mediator, both sides' experts available, and a settlement agreement if it works. The RICS Dispute Resolution Service offers mediation and adjudication tailored to surveying disputes and is sometimes proposed by the insurer's side.
Mediation succeeds most often when both sides have exchanged expert evidence and know the real range. It is worth proposing once your valuation evidence is in.
If it does not settle: issuing proceedings
If the protocol is exhausted, your solicitor will advise on issuing a claim. Three things shape that advice.
Track and costs. Claims up to £10,000 go on the small claims track, where legal costs are largely irrecoverable — which is why small missed-defect claims are often best run through a redress scheme. £10,000 to £25,000 is the fast track, and £25,000 to £100,000 the intermediate track, both with fixed recoverable costs by complexity band since 1 October 2023. Over £100,000 is the multi-track, with costs assessed. The regime determines what you can recover in costs if you win, and what you risk if you lose.
Expert evidence. The court will control it under CPR Part 35, and on the fast and intermediate tracks will often direct a single joint expert on valuation. Your existing reports may need to be redone in Part 35 form.
Funding. Some solicitors offer conditional fee agreements for surveyor claims with strong expert evidence; after-the-event insurance may be available to cover the risk of an adverse costs order. Ask at the outset.
Most claims that survive the letter of response settle before trial. The ones that do not tend to be those where the experts genuinely disagree on whether the defect was visible, or where the diminution evidence is far apart.
What a solicitor will want from you
- The letter of response and any letter of settlement, with the dates received.
- Your expert reports and the instructions given for them.
- Your decision, in principle, on what you would accept — and what you can afford to risk.
- Any Part 36 offer, with its expiry date noted.
- Confirmation of any funding or legal expenses insurance you hold, including under home insurance policies.
This guide is general information about the law of England and Wales. It is not legal advice. CasePoint does not cover personal injury, including injury caused by a building defect.
Frequently asked
The insurer has denied liability outright. Is the claim over?
No. A denial in the letter of response is the norm, not a verdict. It is the insurer's opening position, and the protocol expects both sides to consider ADR after it. Many claims that are denied at this stage settle at mediation or after expert evidence is exchanged. What matters is whether the denial engages with your expert's report or simply restates the scope of the survey.
Should I accept a Part 36 offer?
Only with advice. A Part 36 offer carries costs consequences: if you reject it and later recover less at trial, you can end up paying the other side's costs from the date the offer expired. Whether an offer is reasonable depends on your expert evidence on liability and value, and on the costs regime for your track.