Before 25 April 2024
Operational development
Examples include an extension, outbuilding or other building operation. Where substantial completion was before the changeover date, the former four-year period may still apply.
PLANNING ENFORCEMENT · ENGLAND
The planning “four-year rule” changed
The date that matters is 25 April 2024. The former four-year period can still apply to some earlier development, but new operational development and new changes of use to a single dwellinghouse generally have a ten-year enforcement period.
Reviewed 27 September 2026 against current GOV.UK guidance
Which time limit usually applies?
On or after 25 April 2024
Operational development
Where substantial completion was on or after the changeover date, the usual enforcement period is ten years.
Before 25 April 2024
Use as a single dwellinghouse
Where the unauthorised change of use occurred before the changeover date, the former four-year period may still apply.
On or after 25 April 2024
Use as a single dwellinghouse
Where the unauthorised change occurred on or after the changeover date, the usual enforcement period is ten years.
Other planning breaches
Other changes of use and breaches of condition
These have generally remained subject to a ten-year period. The exact breach and its start date still need to be established from the facts.
Why “substantial completion” matters
The clock for operational development runs from substantial completion, not simply from the day work began, an invoice was paid or someone moved in. Substantial completion is fact-sensitive. A project that looked usable but still lacked a material part of the approved or alleged development may not have reached that point.
Before relying on a date, assemble evidence that identifies what existed, where it existed and when it was complete. A planning professional or solicitor can advise where the facts are disputed or enforcement action has begun.
Passing a time limit does not give you paperwork
Expiry of an enforcement period does not produce a certificate automatically. A Lawful Development Certificate for an existing use or development is the usual route for asking the council to confirm lawfulness formally. The applicant must provide enough precise and credible evidence for the council to decide the application on the balance of probability.
Useful evidence can include
- dated photographs, aerial images and historic mapping;
- builder or supplier invoices and receipts;
- utility, council tax, tenancy or business records relevant to the claimed use;
- plans, survey records and correspondence created at the time; and
- clear statutory declarations or witness evidence from people with direct knowledge.
Do not assume the time limit always protects the development
Current guidance identifies circumstances where action may still be possible after the ordinary period. These include further enforcement following earlier action and cases involving deliberate concealment. Listed-building controls, advertisements, protected trees and building regulations also have their own rules. This page covers planning enforcement time limits in England; it is not a substitute for advice on a live enforcement case.
Lawful Development Certificate or retrospective application?
Evidence points to lawfulness
If the relevant period has expired and the evidence can establish the facts, an existing-use Lawful Development Certificate may be the appropriate route. The council assesses evidence of lawfulness rather than the planning merits of a new proposal.
See the PD Compliance PackPermission is still needed
If the time limit has not expired, the evidence is insufficient or the development needs to be judged on its planning merits, a retrospective planning application may be the appropriate route.
See the Retrospective Planning PackOfficial sources
- GOV.UK: Enforcement and post-permission matters
- GOV.UK: Lawful Development Certificates
- Town and Country Planning Act 1990, section 171B
Scope: England only. This general guide is accurate to 27 September 2026 and is not legal advice. Rules and evidence requirements can change, and individual facts matter.
NOT SURE WHICH ROUTE FITS?
Show us the development and the dates
Send the address, a short description, the date you believe the work was substantially complete and the evidence you already hold. We can explain which drawing pack may fit; specialist legal advice may still be needed where the date or lawfulness is disputed.
Ask Plan ProsFOR BUILDERS, DEVELOPERS & PROPERTY PROFESSIONALS
Need planning drawings for a client project?
Hand us the planning stage for extensions, loft and garage conversions. You keep the build moving; we produce the council-ready drawing pack and keep the handover clear.