Missing Building Regulations Certificate? Selling & Buying

You can buy or sell a house without a building regulations completion certificate, but the missing paperwork may need to be resolved before the transaction can proceed. Start by finding out whether the certificate was lost, the work was never signed off, or approval was not required. Your conveyancer can then assess the evidence, possible indemnity insurance and whether retrospective approval is appropriate. A survey or structural engineer’s report may help investigate the work, but does not replace building control approval. If you need a mortgage, the proposed approach must also satisfy your lender.

This guide focuses on ordinary house transactions in England. Wales, Scotland and Northern Ireland have different rules or procedures; the English enforcement periods below should not be applied across the UK.

What does a missing building regulations certificate mean?

It means evidence of compliance is missing, not necessarily that the work was unauthorised or unsafe.

There are several possible explanations:

• A certificate was issued, but the owner no longer has a copy.
• A building control application was made, but the final inspection or certification was never completed.
• Work requiring approval was carried out without the appropriate process.
• The work did not require approval, or its age means different requirements applied.

Building regulations cover matters including structure, fire safety, ventilation and energy efficiency. Planning permission is a separate issue: planning consent, or permitted development rights, does not establish building regulations compliance. See GOV.UK’s explanation of when approval is needed.

The relevant evidence may be a local authority completion certificate, a private building control final certificate, or a competent person scheme compliance certificate. A building notice or an approval of plans does not establish that the completed work was signed off.

What should you check first?

Ask your conveyancer to identify the exact work, its approximate date and the document needed.

Gather your purchase file, building control references, invoices, drawings, structural calculations and any certificates already held. These can help establish the history, although invoices and calculations do not themselves prove that the completed work complied.

If a certificate already exists, obtaining a duplicate may resolve the enquiry. For example, FENSA provides a certificate search and replacement service.

Before approaching the council about potentially unapproved work, speak to your conveyancer. Contact about the works can affect insurance availability or cover. If contact has already occurred, explain exactly what was said so that the position can be assessed.

Indemnity insurance, regularisation or a survey: which helps?

These measures address different questions and may be used together.

Approach	What it can achieve	Main limitation	Cost and timing
Recover an existing certificate	Supply evidence already issued	Only helps if the relevant record exists	Depends on the provider and records
Building regulations indemnity insurance	Cover specified financial losses arising from enforcement	Does not approve the work or establish its safety	Obtain a property-specific quote; eligible standard cases may be arranged quickly
Regularisation	Obtain retrospective certification for eligible unauthorised work	May require investigation and remedial work; certification is not guaranteed	Council fees plus investigation, repairs and making good; no fixed national completion time
Survey or structural engineer’s report	Investigate condition or a particular structural concern	Does not replace building control certification; hidden elements may remain unverified	Depends on scope, access and further investigations

When can indemnity insurance help?

Building regulations indemnity insurance may help a transaction proceed where evidence is missing and the buyer and lender accept the proposed cover.

It addresses an identified legal risk. It is not a building warranty or a general fund for repairing defective work. The insured losses, exclusions and conditions depend on the policy. For an example of the distinction, see this building regulations specimen policy.

Ask your conveyancer to confirm:

• Whether the particular work and its age meet the insurer’s criteria.
• Who is protected, including the buyer, lender and future owners where applicable.
• The premium, indemnity limit and any separate arrangement fee.
• How previous council contact or proposed future alterations affect cover.

There is no universal 12-month insurance rule. For example, GCS advertises eligibility for certain alterations completed at least three months earlier, subject to its terms. Insurance availability does not establish mortgage lender acceptance.

What is a regularisation certificate?

Regularisation is a local authority route to retrospective approval of eligible unauthorised work. GOV.UK describes it as available for work carried out after 11 November 1985. The authority may require alterations before issuing a certificate. See GOV.UK’s regularisation guidance.

Investigations may involve exposing structural supports, foundations or other concealed work. The budget should include council charges, professional advice, opening up, remedial work and reinstatement.

If there was already a building control application, ask whether completing that process is appropriate. An unfinished application should not automatically be treated as a regularisation case.

A regularisation certificate concerns the work covered by the application. It is not a guarantee that the whole house is defect-free.

Will a structural engineer’s report be enough?

A targeted report can help assess a removed load-bearing wall, beam or altered roof structure. It cannot provide building control approval or automatically satisfy a lender.

Agree what needs investigating and whether concealed elements need exposing. For a loft conversion, structural adequacy is only part of the picture: fire precautions, stairs and other requirements may also need assessment.

A general home survey has its own limits. RICS explains that its Level 3 survey depends on accessibility and does not include specialist testing of services. Gas and electrical concerns may need suitably qualified specialists.

Can you get a mortgage without building regulations sign-off?

Possibly, but the outcome depends on the lender, the work and the evidence available.

The UK Finance Mortgage Lenders’ Handbook contains general instructions and lender-specific instructions. Your conveyancer must check the applicable requirements and the mortgage offer, and obtain further instructions where necessary.

Do not assume that the availability of insurance, the age of the work or a previous owner’s mortgage means your lender will accept the position. A lender may require further evidence or investigation, or decline the property as security.

Any proposal to retain money pending resolution needs the relevant parties’ agreement and must comply with the lender’s requirements. A retention is not an automatic alternative to approval.

Does building regulations enforcement end after 12 months?

There is no safe blanket rule that work becomes acceptable after 12 months.

In England, changes effective from 1 October 2023 extended the section 36 Building Act 1984 notice period from 12 months to 10 years. Older work and existing proceedings require consideration of the applicable transitional rules. Section 36 notices are also distinct from prosecution, injunctions and dangerous-building powers. LABC’s enforcement policy explains the different powers and time limits.

Ask your conveyancer which rules apply to the particular work. Its age does not establish safety, produce a missing certificate or guarantee acceptance when you sell again.

What if the missing paperwork concerns windows, a boiler or electrics?

Identify the document before choosing a solution:

• Windows and doors: FENSA or CERTASS certification may be relevant, depending on the installation and date. Building control certification may be an alternative; a missing FENSA certificate alone does not establish that the work was unapproved.
• Gas boiler installation: The building regulations compliance certificate is different from a servicing record or landlord gas safety record.
• Electrical work: Establish whether the issue concerns installation certification, building regulations notification or the installation’s current condition. An Electrical Installation Condition Report (EICR) does not itself supply historic building control sign-off.

For conservatories, establish whether an exemption applied. They do not all require the same approval process: government guidance sets out conditions affecting conservatory exemptions.

Frequently asked questions

What happens if the seller will not pay for indemnity insurance?

Responsibility for the premium is normally negotiated. A buyer may agree to pay it, request a contribution or discuss another solution. Paying the premium does not resolve any separate concern about safety or lender acceptance.

How long does regularisation take?

There is no reliable national deadline for obtaining the certificate. Timing depends on inspections, evidence, access and any remedial work. Once your conveyancer has advised on the approach, obtain a case-specific estimate and update the chain.

What if the seller refuses an inspection or regularisation?

Ask your conveyancer and surveyor what remains unresolved and what that means for proceeding. The buyer can consider further negotiation, a revised price or withdrawal before exchange, subject to any separate contractual commitments. A discount does not establish that the work is safe.

The work is 20 years old. Do I still need paperwork?

Its age may affect the legal assessment, but does not remove questions about condition, mortgageability or resale. Establish what requirements applied when it was done and what evidence can now be provided.

Can I use the indemnity policy from my previous purchase?

Possibly. Your conveyancer should check who is insured, the covered works, indemnity limit, conditions and any subsequent changes. A new buyer’s lender may have different requirements.

What if I have already bought the house?

Review your purchase documents and report on title to see what was identified and explained.

How can buyers, sellers and estate agents reduce delays?

Sellers: collect the documents early and answer enquiries accurately, including where the history is unknown.

Buyers: tell your surveyor which alterations lack paperwork and ask your conveyancer to explain what the proposed solution covers and what remains unresolved.

Estate agents: identify the outstanding document, who is obtaining it and the next decision date. Avoid promising that insurance will settle the issue before the conveyancers and lender have confirmed the approach.

Before exchange, ask: What evidence have we obtained, what will the lender accept, and what risk will remain with me after completion?