What is a Breach of Building Control?

A breach of planning control occurs when development that requires planning permission is carried out without approval, or when work does not follow the conditions or drawings attached to a planning permission. An unauthorised change in the use of a property can also constitute a planning breach.

A building control breach is different. It occurs when building work fails to comply with the applicable Building Regulations. Work may also have been completed without the required building control application or inspections.

When a planning breach is identified, an Enforcement Notice may be issued. The notice explains the breach and the steps needed to remedy it. The date on which the notice takes effect must normally be at least 28 days after it is served, giving the recipient time to appeal. Failure to comply with an effective notice can become a criminal offence and may result in prosecution and an unlimited fine.

Building control authorities have separate powers. These can include prosecution, compliance notices, stop notices and a Section 36 notice requiring non-compliant work to be altered or removed.

Time Limits for Enforcement Action

Planning and building regulations have different enforcement periods.

For planning breaches in England, the date of the development is important. The transitional arrangements are explained in the Dorset Council Development Management Local Enforcement Plan:

• Operational development substantially completed before 25 April 2024 may remain subject to the previous four-year enforcement period.
• Operational development substantially completed on or after 25 April 2024 is generally subject to the new ten-year period.
• The same transition applies to the unauthorised change of use of a building into a single dwellinghouse.
• Other planning breaches were already generally subject to a ten-year enforcement period.

The usual time limits may not protect development that has been deliberately concealed. A council can apply for a Planning Enforcement Order where positive steps were taken to conceal a breach. The Dorset plan states that an application must be made within six months of sufficient evidence coming to the council’s knowledge. If an order is granted, the council may receive a further 12 months to investigate and act.

For building regulations, the Building Safety Act extended the period for serving a Section 36 notice from 12 months to ten years. Lancaster City Council’s guidance on the building regulations changes also states that prosecution may be possible up to ten years after the offending work is completed.

A further point is that the ten-year deadline relates to serving a Section 36 notice. It does not necessarily prevent the later enforcement of a notice that was served within the relevant period. The LABC Enforcement Policy for England and Wales refers to Bello v London Borough of Lewisham, where a building regulations contravention was enforced approximately 12 years after the original notice was served.

Formal enforcement action can have serious consequences. Following the relevant time limits and understanding which system applies is crucial for maintaining legal compliance and avoiding costly penalties.

How to Prove Continuous Use or Development

To demonstrate that development has become lawful for planning purposes, strong evidence of continuous use or the date of substantial completion is essential. This can include tenancy agreements, utility bills and electoral roll documents covering the relevant period.

For operational development and non-residential properties, dated photographs, invoices, plans and satellite imagery may help establish when the work was completed or how long a use has continued.

The evidence should be clear, consistent and cover the full relevant period. This is important because the passage of time alone does not automatically provide a formal record that the development is lawful.

Applying for a Lawful Development Certificate

A Lawful Development Certificate (LDC) is a legal document confirming that an existing use, operation or development is lawful for planning purposes. It can provide formal reassurance against future planning enforcement action.

To apply for an LDC, the site owner must provide sufficiently precise evidence demonstrating that the development or use is lawful. Depending on the case, this may include dated photographs, tenancy agreements, utility bills, council tax records, invoices, plans, aerial imagery and statutory declarations.

If an application is refused, the site owner can reapply with additional evidence or appeal the decision. Working with a planning consultant may be helpful when preparing the evidence or responding to a refusal. Neighbours may provide information to the council, but an LDC application is determined on legal evidence rather than the planning merits of the development.

When can I apply for a Lawful Development Certificate?

You can apply for a Lawful Development Certificate when you need formal confirmation that an existing use, operation or building is lawful.

For breaches occurring on or after 25 April 2024, a ten-year planning enforcement period generally applies. The previous four-year period may still apply to operational development or the unauthorised conversion of a building into a single dwellinghouse where the relevant breach occurred before that date.

An LDC can also be used to confirm that proposed work would be lawful under permitted development rights, so it is not limited to cases involving historic planning breaches.

Retrospective Planning Permission vs. Lawful Development Certificate

Retrospective planning permission and a Lawful Development Certificate are two separate approaches to addressing completed development without prior planning consent.

Retrospective planning applications are used when development or construction work has been carried out without the necessary planning permission. The application asks the local planning authority to assess the completed work against relevant planning policies. Permission is not guaranteed and the authority may require changes if the application is refused.

Lawful Development Certificates, on the other hand, do not grant planning permission. They provide legal confirmation that an existing use, operation or building is lawful and immune from planning enforcement action. An LDC can also confirm that proposed development would be lawful.

Choosing the correct approach depends on the nature of the development, when it was completed, the applicable enforcement period and the evidence available.

Building Regulations Regularisation

A Lawful Development Certificate only confirms the planning position. It does not provide building regulations approval or replace a Completion Certificate.

Where building work was completed without the required building control application, the property owner may be able to apply to the local authority for a Regularisation Certificate. Regularisation is generally available for unauthorised work started on or after 11 November 1985, as explained in Guildford Borough Council’s building control guidance.

Regularisation is not simply a paperwork exercise. Building Control may require drawings, structural calculations and other technical evidence. Parts of the finished construction may also need to be opened up so concealed work can be inspected. The current Basingstoke and Deane Building Control fee guidance specifically warns that applicants may need to expose critical areas of construction and provide calculations.

Charges are set locally and are often higher than applying before work begins. As a current example, Wandsworth Borough Council’s 2026 charges list a regularisation charge of £1,104 for an extension up to 40 square metres and £1,083.60 for a loft conversion of the same size. These are local examples rather than Cornwall prices, so property owners should check the charges set by their own building control authority.

Common Misconceptions About the 10 Year Rule

There are several common misconceptions about the ten-year rule:

• A major misunderstanding is that the rule automatically legalises development. It only limits particular enforcement powers and does not issue planning permission, building regulations approval or a Completion Certificate.

• Another misconception is that the ten-year rule applies universally across the UK. The planning change discussed in this article applies to England. Wales, Scotland and Northern Ireland have different systems.

• The old four-year planning period has not disappeared in every case. Transitional arrangements mean it may still apply to certain development completed before 25 April 2024.

• Deliberate concealment can allow planning authorities to act outside the normal enforcement period.

• An existing building regulations notice may remain enforceable after ten years if it was served within the relevant deadline.

Understanding these distinctions helps property owners and developers navigate the regulations more effectively. A planning consultant can explain which rules are likely to apply to a particular development.

Strategic Planning Solutions for Long-Term Compliance

Strategic planning is essential for ensuring long-term compliance with planning conditions and regulations. Obtaining a Lawful Development Certificate can provide formal confirmation of the planning status of a development.

Building regulations should be considered separately. Planning immunity or an LDC does not confirm that construction meets the required technical and safety standards.

Consulting with planning specialists can help you understand recent changes, select the correct application and prepare the evidence required. We are experienced planning consultants who can help you stay informed and proactive. Get in touch to discuss planning compliance on your development.

Conclusion

Understanding the 10-year rule begins with separating planning enforcement from building regulations enforcement.

For most new planning breaches in England, the enforcement period is now ten years, although the previous four-year period may still apply to certain development completed before 25 April 2024. Building regulations have a separate ten-year period for serving a Section 36 notice, increased from the previous 12-month limit.

Neither rule automatically approves unauthorised work. Proving continuous use, applying for a Lawful Development Certificate and addressing missing building control approval are separate processes that require the correct evidence and professional advice.

Staying informed and proactive is key to maintaining compliance. Engage with the relevant authorities, seek professional advice and prepare the right documentation before submitting an application. Head back to our blog homepage for more architecture articles.

Frequently Asked Questions

Does building work automatically become legal after ten years?

No. The expiry of an enforcement period does not automatically grant planning permission, building regulations approval or a Completion Certificate.

Can building regulations be enforced after ten years?

A new Section 36 notice is generally subject to a ten-year limit from completion of the work. However, a notice served within the deadline may remain enforceable after ten years have passed. Other safety and legal powers may also apply depending on the circumstances.

Does the old four-year planning rule still apply?

It may still apply to certain operational development and conversions to a single dwellinghouse where the relevant breach occurred before 25 April 2024. Development falling under the new rules is generally subject to a ten-year period.

How long do I have to appeal a Section 36 notice?

Lancaster City Council’s building regulations guidance states that an appeal may need to be made within 21 days. Property owners should seek professional and legal advice promptly after receiving a notice.

Can old building work be regularised?

Regularisation is generally available for unauthorised work started on or after 11 November 1985. Building Control may require drawings, calculations, inspections, opening-up work and alterations before issuing a certificate.

Is a Lawful Development Certificate the same as building regulations approval?

No. An LDC confirms the planning status of a development. It does not confirm compliance with Building Regulations or replace a Completion Certificate.