Quick summary: building regulations enforcement period
The building regulations enforcement period in England is generally 10 years for a formal notice under Section 36 of the Building Act 1984 requiring non-compliant building work to be removed or altered. This replaced the previous 12-month limit on 1 October 2023, following changes introduced by the Building Safety Act 2022.
- Before October 2023: Section 36 notices were generally subject to a 12-month limit from completion of the work.
- From 1 October 2023: The notice period increased to 10 years from completion.
- Work completed before 2023: The revised powers can apply to older breaches, subject to the statutory conditions and transitional protections.
- After 10 years: The expiry of the Section 36 notice period does not automatically make unlawful work compliant or prevent every other legal remedy.
- Missing certificates: An expired enforcement window does not create a Building Regulations completion certificate.
- Planning permission: Planning enforcement follows different rules and must be considered separately.
For homeowners: If you have an older extension, loft conversion, garage conversion or other building work without clear Building Control records, check when the work was completed, whether it complied with the requirements applicable at the time, and whether any enforcement action has already been taken.
This guide explains the dates, the difference between enforcement and retrospective approval, and the practical steps you can take if your council raises concerns.
Jurisdiction: The main guidance covers England. Wales, Scotland and Northern Ireland have their own regulatory arrangements. This is general homeowner guidance, not legal advice on an individual enforcement case.
Concerned about older building work?
Our team can help you review your existing plans, Building Control records and the next steps towards resolving missing approvals.
What is the building regulations enforcement period?
The building regulations enforcement period describes the time within which certain formal enforcement action can be taken against building work that does not comply with the regulations.
For homeowners in England, one of the most important rules is found in Section 36 of the Building Act 1984. It allows the relevant building control authority to require non-compliant work to be removed or altered.
Since 1 October 2023, the time limit for issuing a Section 36 notice has generally been 10 years from the completion of the work. However, this is not a universal deadline for every possible enforcement action.
What counts as a breach of Building Regulations?
A breach can occur when building work fails to meet an applicable technical or procedural requirement. Common examples in residential projects include:
- Structural alterations without adequate support or suitable calculations.
- Loft conversions with inadequate fire protection or escape arrangements.
- Extensions that fail applicable insulation or energy-efficiency requirements.
- Electrical work that does not meet relevant safety requirements.
- Building work carried out without the required Building Control application or notification.
Nevertheless, missing paperwork does not necessarily prove that the physical construction is unsafe. Equally, a building that appears sound may still contain concealed defects or lack the required approval.
For a fuller explanation of the approval process, read our complete homeowner guide to Building Regulations.
When did the Building Regulations enforcement period change?
The important change took effect in England on 1 October 2023. Section 39 of the Building Safety Act 2022 amended the Building Act 1984, extending the Section 36 notice period from 12 months to 10 years.
Therefore, homeowners searching for the old 12-month rule may find information that no longer reflects the current position.
12 months versus 10 years: what changed?
| Issue | Previous position | Current position in England |
|---|---|---|
| Section 36 notice deadline | 12 months | 10 years |
| When the period starts | Completion of the work | Completion of the work |
| Main legislation | Building Act 1984 | Building Act 1984, amended by the Building Safety Act 2022 |
| Older work | Earlier enforcement framework | New powers may apply, subject to legal conditions and transitional provisions |
| Other enforcement routes | Separate legal provisions | Separate legal provisions continue to require consideration |
The October 2023 changes also strengthened enforcement through other measures, including compliance notices and stop notices in relevant circumstances.
Does the 10-year enforcement period apply to work completed before 2023?
Potentially, yes. This is one of the most important points for anyone who owns a property with an older extension or conversion.
Government guidance confirms that the updated powers may apply to projects started before 1 October 2023, provided the relevant contravention remains ongoing and the statutory conditions are met.
However, enforcement action already commenced before that date can be subject to transitional protections. In particular, Section 36 notices served before 1 October 2023 remain governed by the previous provisions.
Example: an extension completed in 2020
Suppose an extension was completed in 2020 without complying with the applicable structural requirements. A homeowner should not assume that the former 12-month deadline provides permanent protection.
Under the amended legislation, the authority may potentially consider a Section 36 notice within 10 years of completion, subject to the legal requirements.
The correct approach is to establish the completion date, identify the suspected contravention and check whether any notices or proceedings were started previously.
What if nobody knows when the work was completed?
Establishing the completion date can become important, particularly when a house has changed ownership.
Useful evidence may include:
- Dated building invoices and contractor correspondence.
- Photographs showing the construction stages.
- Building Control inspection records.
- Completion certificates or previous application documents.
- Survey reports, property records or dated correspondence.
If the date is disputed, take professional legal advice rather than relying on an estimate or assuming that the council cannot act.
How can Building Control enforce a breach?
Enforcement is not limited to a single type of notice. Depending on the circumstances, the relevant authority may have several routes available.
Section 36 notices
A Section 36 notice can require an owner to remove non-compliant work or make the alterations needed to achieve compliance.
The statutory 10-year deadline relates specifically to issuing this type of notice. The process and any response deadlines in a notice should be taken seriously.
Compliance notices and stop notices
The strengthened enforcement framework also provides for compliance and stop notices in relevant circumstances.
A compliance notice can require a contravention to be remedied. A stop notice may require specified work to stop, particularly where statutory conditions involving non-compliance or serious risk are met.
These powers have their own legal tests. Consequently, homeowners should not assume that the Section 36 deadline governs them all.
Criminal proceedings and injunctions
Serious breaches may also lead to prosecution. In addition, Section 36(6) preserves the possibility of seeking an injunction through the courts in appropriate circumstances.
For this reason, the expiry of a Section 36 notice period should never be presented as a complete guarantee against enforcement.
Our separate guide explains how Building Control works, what inspectors check and why approval matters.
Not sure whether your existing work complies?
We can help you identify missing drawings and supporting documents, then explain practical options for approaching Building Control.
What happens when the Building Regulations enforcement time limit expires?
If the statutory 10-year Section 36 period has genuinely expired, that particular route for issuing a new notice is normally no longer available.
However, this does not mean that the building work has automatically become lawful, safe or fully certified.
Does the work become legal after 10 years?
No automatic approval is created simply because time has passed. A historic breach may remain relevant even when a particular enforcement deadline has expired.
There may also be separate concerns relating to unsafe conditions, other statutory powers or the evidence required during a property transaction.
Can you sell a house without a Building Regulations certificate?
A property can potentially be sold without every historic Building Regulations certificate. Nevertheless, missing documentation may lead to questions from buyers, solicitors, surveyors and mortgage lenders.
Buyers may want evidence that an extension or conversion was properly constructed. Sometimes a professional inspection, additional documentation or retrospective application will be appropriate.
Our guide to completion certificates and why homeowners need them explains their role when selling or remortgaging.
Retrospective Building Regulations approval and the enforcement period
If building work was completed without the necessary approval, retrospective regularisation may be an option.
In England, regularisation is a procedure through which a local authority building control body can assess certain unauthorised work carried out after 11 November 1985.
The authority may request drawings, inspections, opening-up work or improvements before deciding whether it can issue a regularisation certificate.
Does regularisation have a 10-year time limit?
The Section 36 notice deadline and eligibility for regularisation are different questions. The 10-year enforcement limit does not automatically prevent a homeowner from making a retrospective application.
Equally, a successful application is not guaranteed. The authority needs sufficient evidence of compliance with the applicable requirements.
Our guide to retrospective approval and time limits explains this process in more detail.
What about boiler replacements or electrical installations?
Certain work, including many boiler replacements and electrical installations, may be covered by competent person schemes and associated certification.
If a document is missing, first check whether the installer registered the work and whether replacement evidence can be obtained.
There is no separate universal 10-year exemption that automatically makes an uncertified boiler or electrical installation compliant.
Building Regulations enforcement period: England versus Wales and the wider UK
Although homeowners commonly search for a single UK-wide rule, building control legislation and procedures differ across the four nations.
England
The 10-year Section 36 notice period took effect on 1 October 2023, alongside important changes to Building Control enforcement powers.
Wales
Wales has its own commencement arrangements. The corresponding Section 39 amendments were brought into force in Wales on 1 July 2026. Therefore, older Welsh cases and action taken before that date require particular care when identifying the applicable provisions.
Scotland and Northern Ireland
Scotland operates a building standards system, while Northern Ireland has its own building regulations and enforcement arrangements.
The English Section 36 deadline should not simply be applied to properties in either jurisdiction.
How to check whether older building work is at risk of enforcement
If you discover missing approvals, the most useful response is to gather evidence and establish the facts before deciding what to do.
| Step | What to do | Why it matters |
|---|---|---|
| 1 | Identify the work and when it was completed. | The relevant dates influence the applicable legal position. |
| 2 | Search your Building Control records. | There may already be an approval, certificate or inspection history. |
| 3 | Establish which requirements applied. | Historic work must be assessed against the relevant legal requirements. |
| 4 | Check whether any notices were previously issued. | Transitional provisions and existing enforcement action may matter. |
| 5 | Obtain technical advice if compliance is uncertain. | Concealed structural or fire-safety defects may need investigation. |
| 6 | Discuss appropriate approval options with the authority. | Regularisation or corrective work may be available. |
| 7 | Keep the resulting evidence and certificates. | This helps with maintenance, future alterations and property sales. |
For projects involving inspections, our guide explains what happens during Building Control inspections and how to prepare.
Common mistakes about Building Regulations enforcement
Assuming the old 12-month rule still applies
This is a frequent misunderstanding. The law changed in England on 1 October 2023, and the revised provisions may affect older work.
Confusing the four-year planning rule with Building Regulations
Planning enforcement and building control enforcement are separate systems. References to four-year or ten-year planning immunity should not be used to determine the Building Regulations position.
Assuming a lack of council action means approval
The absence of an enforcement notice is not confirmation that work was inspected, approved or constructed correctly.
Ignoring a formal notice
If you receive an enforcement notice, read it carefully and obtain appropriate advice promptly. The notice may specify corrective action, deadlines and available appeal rights.
Conclusion: what homeowners should remember
The main change is straightforward: in England, the period for issuing a Section 36 notice increased from 12 months to 10 years in October 2023.
However, its application to older projects, existing proceedings and other enforcement powers requires care. The 10-year period is not a general guarantee that unfinished, unsafe or uncertified building work can no longer cause problems.
At Plans Made Easy, we recommend establishing the correct dates, checking your records and dealing with any genuine compliance concerns before they become more complicated.
FAQs: building regulations enforcement period
What is the Building Regulations enforcement period in England?
The time limit for issuing a Section 36 notice is generally 10 years from completion of the work. Other types of enforcement action may operate under different legal rules.
When did the Building Regulations enforcement period change to 10 years?
The change took effect in England on 1 October 2023 under the Building Safety Act 2022.
Was the Building Regulations enforcement period previously 12 months?
Yes. The previous deadline for a Section 36 notice was 12 months from completion of the relevant building work.
Does the 10-year rule apply retrospectively?
The strengthened enforcement powers can apply to older work where the relevant breach remains ongoing and the statutory conditions are met. Special transitional provisions protect certain notices and proceedings already commenced before October 2023.
What happens after the 10-year enforcement period expires?
The normal statutory period for serving a new Section 36 notice will have expired. This does not automatically create approval or rule out every other possible enforcement remedy.
Can a council enforce Building Regulations after 10 years?
Potentially through other legally available routes, depending on the circumstances. The 10-year limit specifically concerns Section 36 notices, and the Building Act preserves the possibility of injunctions.
What is the difference between Building Regulations enforcement and planning enforcement?
Building Regulations deal with construction requirements, including structural integrity, fire safety and energy efficiency. Planning enforcement concerns development carried out in breach of planning control. Different laws and deadlines apply.
Can I obtain retrospective Building Regulations approval after 10 years?
Potentially, yes. Regularisation is separate from the Section 36 enforcement deadline. Eligibility and the evidence required will depend on the work and its circumstances.
Does missing Building Regulations approval make a house unsellable?
Not necessarily. However, missing approval may raise concerns during conveyancing. Buyers, lenders or solicitors may request additional evidence or clarification.
Does the same enforcement period apply to boilers?
Relevant building work involving heating installations may fall under Building Regulations, but the absence of a boiler certificate is not automatically resolved by waiting 10 years. Check installer records and any competent person scheme notification.
Does the 10-year enforcement period apply in Wales?
Wales introduced corresponding changes on a different commencement timetable, with the relevant Section 39 amendments coming into force on 1 July 2026. Older cases need to be checked against the Welsh arrangements and applicable transitional provisions.
What should I do if Building Control contacts me about old work?
Ask what breach is alleged, identify the work and its completion date, gather existing approvals and take suitable technical or legal advice. Do not ignore a formal notice or assume a deadline protects you without checking the applicable provisions.
Next steps and useful Plans Made Easy guides
If you want to understand the approval process, missing documentation or historic building work in greater detail, these related guides will help.
- Building Regulations: Complete Homeowner's Guide
- Building Control: What It Is and When You Need It
- Retrospective Approval: Time Limits and Compliance
- Building Regulations Completion Certificates Explained
- What Is a Regularisation Certificate?
- Certificates and Compliance Documents You Should Keep
- Understanding the Building Regulations Approval Process
- Current Section 36 period 10 years from completion of the relevant work in England.
- Previous period 12 months from completion.
- Change in England 1 October 2023.
- Main legislation Building Act 1984 and Building Safety Act 2022.
- Older building work May be affected by updated enforcement powers, subject to statutory conditions and transitional rules.
- After the deadline No automatic certificate, approval or guarantee against every other remedy.
- Retrospective approval Regularisation may be available through the relevant authority.
- Best first step Check dates, plans, notices, inspection records and existing certificates.
Official guidance and further reading
For the legal provisions and official guidance discussed above, consult these resources:
- Building Act 1984, Section 36 – removal or alteration of offending work. The statutory basis for the formal notice period.
- GOV.UK – official questions and answers on building control changes. Includes guidance on older breaches and the October 2023 enforcement changes.
- Building Safety Regulator – published building control application data. Official information about the higher-risk building regulatory system, rather than domestic enforcement figures.
- GOV.UK – how to apply for Building Regulations approval or regularisation. Practical guidance on approval routes and retrospective applications.
Need help resolving missing Building Regulations paperwork?
Plans Made Easy can help with technical drawings, document reviews and practical guidance on the Building Control approval process. Tell us about your project and we will explain how we may be able to help.
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