Enforcement ground (d): immunity and proving the dates

Ground (d) of an enforcement appeal says the time for taking enforcement action has expired. It accepts that the breach happened and that it was a breach, and it argues that the authority has left it too late. The burden of proving that falls on the appellant, on the balance of probabilities, and it is proved with dates rather than with argument.

Most ground (d) appeals fail on the same point. The appellant can show the use or the building exists and has existed for a long time, and cannot show when it started or that it never stopped.

What ground (d) requires you to prove

Section 174(2)(d) of the Town and Country Planning Act 1990 provides the ground. To succeed you have to establish two things on the evidence: the date on which the breach began, and that the breach has continued without a relevant interruption from that date until the date the notice was issued.

Both limbs matter equally. A start date with a gap in the middle fails, because the immunity period runs from the start of the continuous breach that is still subsisting. A continuous history with no provable start date also fails, because the inspector cannot find that the period has elapsed.

The standard of proof is the civil standard. That is lower than people assume, and it means that credible, consistent evidence from the people who know can carry the day even without documents. What it does not mean is that assertion is enough.

Which time limit applies to your breach

The time limits differ by type of breach, and applying the wrong one loses the appeal before the evidence is reached.

The Levelling-up and Regeneration Act 2023 contains provision moving the four year limits to ten years in England. Check whether those provisions are in force for your breach at the date of the notice, because which limit applies depends on when the breach became immune and when the change took effect. This is exactly the point to take legal advice on rather than to work out from a summary.

Two traps. A change of use to a house in multiple occupation is not a change to a single dwellinghouse, so the longer limit applies. And the four year operational limit runs from substantial completion of the building as a whole, not from the start of works or from the completion of a part.

Establishing the start date

The start date has to be fixed to a period, ideally to a month. Vague evidence that something happened "about 12 years ago" is worth very little.

What fixes a date:

• Dated aerial photography, which for most of England exists at intervals and can bracket a start date between two flights.
• Council tax or business rates records showing a change of banding or a new entry, with the effective date.
• Utility connection records, meter installation dates and first bills.
• Building Regulations applications, completion certificates or inspection records, which carry dates and descriptions.
• Tenancy agreements, rent books, land registry entries and mortgage documents.
• Invoices and receipts from the contractor who carried out the works, with dated delivery notes.
• Electoral roll entries for a new unit of occupation.

Statutory declarations from occupiers, neighbours and tradespeople support the documents and do not replace them. A declaration that recites a precise date without explaining how the maker knows it will be given little weight. A declaration explaining that the maker moved in the week their first child started at a named school, and attaching the admission letter, is worth far more.

Proving continuity without gaps

Continuity is where cases are lost, because nobody keeps records to prove that something did not stop.

For a use, the question is whether the use continued as a matter of fact throughout. A period of vacancy does not automatically end the use, and the test is whether the use was abandoned, which looks at the physical condition of the land, the owner's intentions, the length of the interruption and any intervening use. A long vacancy with the building stripped out and marketed for a different use is a real risk.

Build the chronology year by year. For each year identify at least one dated item: a rates bill, a tenancy, an insurance certificate, a photograph, a trade invoice, an annual service record. Gaps of more than a year invite the inspector to find the use was interrupted, and the authority will put that case.

For an operational breach, continuity is less of an issue because the building either stands or it does not. The question becomes substantial completion, and the evidence is construction records and dated photography.

Documents that carry most weight

Inspectors weigh evidence by how hard it would be to manufacture and how directly it speaks to the point.

Contemporaneous third party records come first: rates and council tax records, utility records, dated aerial imagery, Building Regulations files, land registry entries. These were created by someone with no interest in the appeal.

Contemporaneous private records come next: tenancy agreements, invoices, bank statements showing regular payments, insurance schedules. They are strong where they are consistent and complete.

Statements come last, and their weight depends entirely on the detail they contain and the independence of the maker. A statutory declaration from an unrelated neighbour who can anchor the date to an event is worth more than one from the appellant.

Assemble the whole bundle before deciding to appeal, and organise it as a chronology with each item numbered and cross-referenced to the year it proves. An inspector reading a chronological bundle finds the immunity. An inspector reading a bag of documents finds gaps. The same discipline that applies to reading a refusal notice and turning it into a plan applies here, and a Planning Statement style structure keeps the argument tidy.

Concealment and enforcement orders

Immunity can be defeated. Where a breach has been deliberately concealed, the authority may apply to the magistrates court for a planning enforcement order, which if granted opens a further period in which enforcement action may be taken even though the normal limit has expired.

The application has to be made within a defined period of the authority discovering the breach, and the court has to be satisfied that the apparent breach, or some of the matters constituting it, has been deliberately concealed. Concealment means more than failing to apply for permission. Building behind hoarding and presenting the works as something else, or occupying a unit while declaring it unoccupied, is the territory.

The practical lesson is that a ground (d) case built on a history of concealment is dangerous. Evidence assembled to prove continuity can also prove that the appellant knew what they were doing and hid it.

Preparing before a notice is served

The better route, where there is time, is a certificate of lawfulness rather than an appeal.

An application under section 191 for a lawful development certificate for an existing use or operation puts the same evidence before the authority proactively, with the same burden on the applicant and the same standard of proof. If it is granted, the position is settled and the certificate is conclusive. If it is refused, there is a right of appeal, and the evidence is already assembled.

Three reasons to do it that way. The evidence is fresher, and people who can give statements are easier to find before a dispute starts. A certificate removes the risk hanging over a sale or a refinancing, which an unresolved history does not. And an enforcement notice brings compliance deadlines and criminal liability for non-compliance, which an application does not.

So if you know the history is marginal, gather the chronology now. A lawful development certificate is the only formal way to confirm that works or a use are lawful.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. Enter your postcode on PlanScope to see which reports your site is likely to need.