Enforcement warning notice: what it is and what to do

 

An enforcement warning notice is a letter from the council that says, in effect: we think you have built or changed something without permission, we think you would probably get permission if you asked, so please apply. It does not tell you to knock anything down.

That sounds friendly, and in one sense it is. The council is telling you it would rather sort this out with a form than a fight. But the notice is not a favour and it is not a neutral letter. In law it counts as enforcement action, and that has two consequences most people never see coming: it stops the clock that would one day have made your building lawful on its own, and you cannot appeal against it.

This page explains what an enforcement warning notice does, what happens if you ignore it, why applying is not automatically the right answer, and where the real traps sit.

This page covers England. Wales has its own version of the same idea and we set out the difference below. It sits inside our wider guide to planning enforcement.

Whilst we are happy to give you some help via this page, it is often easier to consult a professional. If in doubt – STOP – and reach out to us. We are here to help. Contact us here. 

 

 

What an enforcement warning notice is

 

It is a power the council has had in England since 25 April 2024. Before then it did not exist here at all, which is why older guides and older council web pages do not mention it.

The council can only use it if two things appear to be true. First, that there has been a breach of planning control. Second, that if you did apply for permission, there is a reasonable prospect that permission would be granted. That second test is the whole point of the notice: the council is not supposed to send one unless it thinks the answer would probably be yes.

The notice itself has to do two things. It has to set out what the council thinks the breach is, and it has to say that unless an application for planning permission is made within a period set out in the notice, further enforcement action may be taken.

A copy has to be served on the owner of the land and on the occupier, and on anyone else with an interest in the land that the council thinks would be materially affected if it took further action. So if you rent the property, or you own it and someone else lives there, expect more than one copy to go out.

The government publishes a model version of the notice, so the wording you receive is likely to look much the same wherever you are in England.

 

Why the council sends one instead of an enforcement notice

 

Government guidance tells councils to avoid formal enforcement action where the development is acceptable on its planning merits and action would only be about putting the paperwork right. An enforcement warning notice is the formal way of saying that.

Read plainly, a notice like this is the council telling you it thinks you would win. That is genuinely useful information, and it is worth taking seriously rather than treating it as a threat.

It is also a choice, not a duty. The council does not have to send one, and receiving one does not stop it using any of its other powers at the same time.

 

The catch: it stops the clock

 

Normally, if a council does nothing for long enough, unauthorised building work becomes lawful and cannot be touched. In England that is usually ten years. Our page on enforcement time limits sets out how the periods work and when the old four year rule still applies.

The law has a short, closed list of steps that count as “taking enforcement action”, and issuing an enforcement warning notice is on it. A section 330 notice is not on that list, and neither is a planning contravention notice. Those two are information gathering, and they leave your clock running. This one does not.

There is a second effect, and it is the one that really bites. Where the council has taken enforcement action, it gets a further four years from that action to take more. That four year rule comes from the Act itself, not from guidance, and it applies squarely where an enforcement warning notice is issued in time but further action turns out to be needed later.

So a polite letter inviting you to apply can quietly buy the council four more years to come back at you. If you were close to the point where the work became lawful anyway, that matters enormously, and it is worth getting advice before you do anything.

 

You cannot appeal an enforcement warning notice

 

There is no right of appeal to the Secretary of State against an enforcement warning notice. None. You cannot argue to a planning inspector that the council has got the breach wrong, or that it should never have sent the notice.

The only way to challenge one is judicial review in the High Court, which is slow, expensive and has short deadlines. In practice that is not a realistic option for most householders.

That is a real difference from an enforcement notice, which does carry a proper right of appeal on seven separate grounds, worked through on our page about the enforcement appeal grounds. Our guide to planning appeals covers the ordinary routes and the deadlines.

 

What happens if you ignore it

 

Ignoring an enforcement warning notice is not a criminal offence. There is no fine for failing to apply, and nothing happens to you automatically on the day the deadline passes.

What the government guidance says is simply that if you do not submit an application by the date given, the council may decide to take further enforcement action to sort out the breach. In other words the invitation lapses and the council goes back to its ordinary powers, which do carry fines.

But do not read “no offence” as “no consequence”. The clock stopped the day the notice was issued, and the four year window for further action is already running whether you reply or not.

 

It goes on a public register, and it stays there

 

Every council has to keep a public enforcement register, and since 25 April 2024 enforcement warning notices go on it alongside enforcement notices, stop notices, breach of condition notices and planning enforcement orders.

Six things are recorded: the address, the name of the council, the date the notice was issued, the date copies were served, a statement or summary of the breach alleged, and the date by which an application has to be received.

Here is the part that catches people out. An entry for an enforcement warning notice comes off the register in one situation only, which is if a court quashes the notice. It does not come off because you applied. It does not come off because permission was granted. It does not come off because the council decided to drop it. So it is likely to keep showing up on searches when you come to sell, and you should expect a buyer’s solicitor to ask about it.

One oddity worth knowing, because nobody else seems to mention it. The rule that says entries must go on the register within fourteen days lists the other kinds of notice but does not list enforcement warning notices, and the same is true of the rule requiring county councils to pass information to district councils. On the face of the drafting there is no fixed deadline for entering one. We have not seen this tested and we do not suggest it was deliberate, but if timing matters to you it is worth asking the council directly when the entry was made.

 

Should you apply at all?

 

The notice invites you to apply. It does not compel you, and applying is not automatically the right move. There are three things to weigh before you fill anything in.

An application can restrict a later ground (a) appeal. You can seek retrospective planning permission, or you may later be able to ask for permission through ground (a) of an enforcement appeal. But for an enforcement notice issued in England on or after 25 April 2024, ground (a) is unavailable where the enforcement notice was issued after the related retrospective application was made and within two years after that application ceased to be under consideration. Applying now can therefore close that route for a substantial period; it does not mean the route is lost forever.

The dates matter. If the related application ceases to be under consideration, the two-year restriction can prevent a ground (a) enforcement appeal during that period. A planning application may remain under consideration while a related planning appeal is still live. Do not therefore treat an enforcement warning notice as a routine invitation to apply without first considering what route you may need later.

Watch the Community Infrastructure Levy. If your council charges the levy, permission granted after the event is not eligible for any relief or exemption apart from the one for minor development, and that includes relief or an exemption you had already been given on an earlier permission. This can be the single most expensive consequence in the whole area, and it is worth checking before you decide how to fix the breach rather than afterwards.

It is also worth remembering that an invitation is not a promise. The council cannot tie its own hands before determining an application, so it may still refuse, and it may still take enforcement action about other parts of what you have done.

If any of that applies to you, take advice before you answer the notice rather than after.

 

What it costs

 

There is no fee for receiving an enforcement warning notice, and nothing to pay for the notice itself.

The cost comes from the application it asks you to make. What you pay depends on what you are applying for, and the figures change, so we do not quote them here. Our planning application fees page has the current position. On top of the fee you may need drawings, and possibly a planning consultant, and those are usually the larger part of the bill.

 

If the application is refused

 

A refusal carries the ordinary right of appeal, and our planning appeals page explains how that works and how long you have. Householder appeals in particular have a much shorter deadline than people expect.

Before you appeal a refusal, read the one go point above again. The interaction between a refused application and a later enforcement notice is where people lose rights without realising it.

 

England only: how Wales differs

 

The enforcement warning notice described on this page is an England only power, and it has only existed here since 25 April 2024.

Wales got its own version years earlier, under a different section of the same Act, and it works in much the same way: the council can issue one where it thinks permission would probably be granted, it has to say what the breach is, and it has to give a date by which an application must be made. Both versions count as taking enforcement action, so both stop the clock.

The bigger Welsh difference is the time limit itself. Wales kept the four year rule for building work and for a change of use to a single house, where England moved to ten years. If your land is in Wales, check the Welsh position before relying on anything above.

 

 

Enforcement warning notices: relevant legislation and guidance

The primary sources below are on legislation.gov.uk. Check the “Changes to Legislation” panel at the top of each page for any amendments not yet incorporated into the revised text.

• Town and Country Planning Act 1990, s172ZA: the enforcement warning notice power in England, in force from 25 April 2024
• Town and Country Planning Act 1990, s171A: the closed list of steps that count as taking enforcement action
• Town and Country Planning Act 1990, s171B: time limits, and the further four years for later action
• Town and Country Planning Act 1990, s188: the public register of enforcement action
• Town and Country Planning Act 1990, s174: the right of appeal that exists against an enforcement notice but not against a warning notice
• Town and Country Planning Act 1990, s173ZA: the equivalent Welsh power
• SI 2015/595, article 43: what has to be recorded on the enforcement register, and when an entry is removed
• SI 2024/452: the commencement regulations that brought the England power into force on 25 April 2024
• Enforcement and post-permission matters: paragraphs 013c to 013e, which cover the notice, the absence of an appeal and what happens on non-compliance, and which also carry the government’s model notice

Other Enforcement Sections

 

 

 

Enforcement warning notice Page Updated: 22nd August 2026