Legal
Selling a House With Unresolved Building Regulations
Unresolved building regulations — where past work (an extension, conversion, new windows, electrics) lacks a building-regulations completion certificate — raises an enquiry on a sale and can make a cautious lender hesitate. You can resolve it with a regularisation certificate, use indemnity insurance for older work, disclose and price for it, or sell as-is to a cash buyer who completes in 7-28 days. You must disclose the position honestly.
What is your property worth?
Get genuine offers from checked & vetted buyers.
- Missingcompletion certificate
- Regulariseor insure
- 7-28 dayscash, disclosed
What unresolved building regs means
Building regulations govern how work is built — structure, safety, insulation, electrics, drainage — and compliant work is evidenced by a completion certificate. "Unresolved" building regs means past work (an extension, loft conversion, new windows, a boiler or electrical work) was done without that sign-off, or the certificate is missing. The buyer’s solicitor will check building-control records and raise an enquiry about it (see selling without building regs).
How to resolve it
| Option | Detail |
|---|---|
| Find the certificate | It may exist — check with the council/installer |
| Regularisation certificate | Apply to the council to assess and certify the work |
| Indemnity insurance | Common fix for older work |
| Disclose & sell as-is | To a cash buyer |
Regularisation vs indemnity insurance
Regularisation means applying to the local authority to inspect and certify the work — it may require opening up parts of it, but produces a proper certificate and the widest market. Indemnity insurance suits older work where enforcement is largely time-barred, protecting the buyer and lender so a mortgage sale can proceed without regularising. Do not contact the council about the specific work once you intend to insure, as that can void the policy.
Disclosure
You must disclose unresolved building regulations on the property information form — the buyer’s solicitor checks building-control records, so concealment is futile and risks a claim. Provide whatever you have: any certificates, the date of the work, and any indemnity policy. Honest disclosure with a clear plan (regularisation or insurance) reassures buyers and keeps the sale on track.
Selling fast
If regularising is slow, the issue is deterring mortgage buyers, or you need speed, a cash buyer will purchase with the issue disclosed, accept or insure the risk, and complete in 7-28 days without a lender to satisfy. You disclose the position, accept a price reflecting it, and gain certainty. See FENSA and HETAS for specific certificate cases.
Don’t accept a lowball offer for your home
Compare genuine cash offers and investor options in minutes — free, no obligation, no fees.

Written & reviewed by Lisa Hayes, Founder
Lisa Hayes is the founder of Ready Steady Sell and an independent UK home-selling expert with over a decade helping homeowners weigh cash house buyers, property investors and the wider fast house-sale industry — without pressure or hidden fees. Every guide is reviewed for accuracy under our editorial standards.
LinkedIn · Expert commentary · In the media · Industry statistics
Frequently asked questions
Straight answers, no sales talk
Can I sell a house with unresolved building regulations?
Yes — resolve it with a regularisation certificate, use indemnity insurance for older work, disclose and price for it, or sell as-is to a cash buyer. You must disclose it.
What is a building-regulations completion certificate?
The document confirming that building work met the regulations (structure, safety, insulation, electrics). Missing it for past work raises an enquiry on a sale.
How do I resolve missing building regs?
Find the certificate if it exists, apply for a regularisation certificate from the council, or use indemnity insurance for older work where enforcement is largely time-barred.
Does missing building regs stop a mortgage?
It can give a cautious lender pause until resolved by regularisation or indemnity insurance. Cash buyers are unaffected.
Do I have to disclose unresolved building regs?
Yes — disclose it on the property information form. The buyer’s solicitor checks building-control records, so concealment is futile and risks a claim.
How fast can I sell with unresolved building regs?
A cash buyer can complete in 7-28 days, buying with the issue disclosed and accepting or insuring the risk.
