Bad survey result decoder

What “bad” means

A RICS Home Survey rates findings on a three-point condition scale. Category 1 means no repair needed. Category 2 means defects that need attention but aren't urgent. Category 3 means defects requiring repair, replacement, or further investigation, and they need addressing. Category 3 is the line where a survey starts to feel “bad”. But a single Cat 3 on a 1930s semi is not the same problem as four Cat 3s on a Victorian terrace with movement.

The other thing worth knowing: surveyors hedge. They have professional indemnity insurance to protect, so they describe risks in language that often reads worse than the underlying issue. “Evidence of historic movement” in a 120-year-old house is normal. “Active movement requiring further investigation” is not. Read the wording carefully before calling anyone in a panic.

If you bought a Level 2 (HomeBuyer) and the surveyor flagged something they couldn't fully assess, the right next step is often a Level 3 (Building Survey) or a specialist report rather than abandoning the purchase. Read Level 2 vs Level 3 survey if you're not sure which one you're holding.

Your immediate decision tree

You have four real choices, and the right one depends almost entirely on which Cat 3 items appeared and whether your mortgage lender will still lend.

1. Path 1, Proceed

   Choose this when the only Cat 3s are predictable for the property type and age, the lender has confirmed the mortgage, and the cumulative repair cost is under 1% of the purchase price. A 1970s semi with worn felt and a tired bathroom is not a bad survey, it's a normal one.

2. Path 2, Renegotiate

   The most common path. You ask the seller to reduce the price, do the repairs before completion, or pay for a specialist follow-up. Use written quotes, not estimates from the surveyor, as evidence. Most negotiations conclude in 5 to 10 days.

3. Path 3, Specialist survey first

   When the surveyor has flagged something they can't fully assess, structural engineer, damp and timber specialist, electrician for an EICR, roofer, knotweed surveyor. Costs are usually £200 to £600 each, and the result either kills the deal cleanly or gives you exact figures to negotiate from.

4. Path 4, Pull out

   You pull out when the property is unmortgageable, when remediation cost exceeds the negotiated headroom and the seller refuses to move, or when the survey reveals something you wouldn't have offered on if you had known. See the criteria below.

How to renegotiate after a bad survey

Renegotiation works when it's evidence-led. Sellers (and their estate agents) ignore buyers who cite the survey vaguely. They engage with buyers who present a written quote, name the contractor, and tie the request to a specific repair line in the report.

The structure that works in practice: take the total of all Cat 3 repair quotes, add a 10-20% buffer, and split Cat 2 maintenance items 50/50 with the seller. Ask for that figure as a reduction. If they say no, offer to split the difference. Most successful negotiations land between 2% and 8% off the agreed price.

Typical defect cost estimates (UK, 2026)

Indicative ranges based on RICS BCIS data and tradesperson quotes. Always get two written quotes before negotiating.

Frame the request in writing through your solicitor or the estate agent, not over the phone. A short email listing the survey reference, the defect, the quote, and the requested reduction gets answered. Phone calls get talked down. Send it once, give the seller 48 hours, and don't chase before then.

If the report names a specific issue, use the detailed next-step guide for survey found damp, roof defects on survey, drainage issues on survey, or subsidence on survey before you price the reduction.

When to pull out

Withdrawing before exchange is free of contractual penalty in England and Wales, but you lose the money already spent. Sunk costs are usually £800-£1,800: the survey fee itself, the mortgage valuation, and solicitor work done to date. None of that is recoverable. Don't let it pressure you into a purchase that's wrong.

Pull out when any of the following are true:

• Your lender has formally reduced or withdrawn the mortgage offer based on the survey
• Total estimated remediation exceeds 12% of the purchase price and the seller refuses to move more than 3%
• A structural engineer confirms active movement, rather than the surveyor only raising it as a possibility
• Japanese knotweed is within seven metres of the property and there is no insurance-backed management plan
• Spray foam in the roof void and the lender refuses to lend without removal, but the seller refuses to remove it or reduce the price
• Construction type is non-standard (PRC, Wimpey No-Fines, certain timber-frame) and your insurer refuses cover
• The cumulative findings would put you in negative equity within five years on conservative assumptions

To pull out cleanly: tell your solicitor in writing that you are withdrawing, ask them to notify the seller's solicitor and the estate agent, and cancel any pending searches or valuations that haven't been started yet. You don't need to give the seller a reason, but a one-line summary citing the survey is professional and keeps the door open if their position softens later.

Frequently asked questions