A Redbridge enforcement notice has been quashed after an Inspector found that the most serious part of the notice alleged the wrong kind of breach of planning control.
The notice referred to alterations to windows as unauthorised operational development. But the council’s own enforcement material showed that the real planning issue was the replacement of windows required by a condition on a 1997 planning permission to remain fixed shut and obscure glazed.
The Inspector found that changing the notice from one alleging unauthorised development into one alleging failure to comply with a planning condition would go beyond a permissible correction. The notice also failed to identify the affected windows and required remedy with sufficient precision.
Forest House enforcement notice challenged
Inspector A Berry allowed enforcement appeal APP/W5780/C/25/3369676 on 7th September 2026. The appeal concerned Forest House, 2–6 Carnarvon Road, South Woodford, London E18 2NY.
The London Borough of Redbridge had issued its enforcement notice on 25th June 2025. It alleged, in summary, the construction of a single-storey rear structure described as a conservatory and alterations to windows in the northern elevation.
The notice required the rear structure to be removed and required windows in the northern elevation to be replaced so that they were fixed shut and obscured, with a four-month compliance period.
The appeal had formally been made on grounds (f) and (g), which concern excessive requirements and an insufficient compliance period. But before reaching those grounds, the Inspector had to consider whether the enforcement notice itself was valid.
The conservatory description could have been corrected
There was an obvious problem with the first part of the notice. The structure described as a “conservatory” was more accurately a rear extension.
That error was not, by itself, fatal. The Inspector considered that the wording could have been corrected under section 176 of the Town and Country Planning Act 1990 without causing injustice because the appellant understood which structure the notice was addressing.
This is an important starting point. An enforcement notice is not automatically invalid because it contains an imperfect description. Section 176 gives an Inspector power to correct a defect, error or misdescription, or vary the notice, where that can be done without injustice to either party.
The windows allegation was a fundamentally different problem
The windows were different.
The Inspector found that the relevant windows had not merely been “altered”. Existing windows had been removed and replaced. More importantly, Redbridge’s enforcement material showed that the planning concern arose from condition 5 of planning permission 1096/97.
That condition required relevant windows to be fixed shut and obscure glazed. The windows now in place could be opened and used clear glazing.
This exposed a basic legal mismatch in the notice.
Under section 171A(1) of the 1990 Act, a breach of planning control can arise in two different ways: carrying out development without the required planning permission, or failing to comply with a condition or limitation attached to a planning permission.
The notice had been framed as the first kind of breach: unauthorised development. But the council’s case about fixed and obscure-glazed windows was really a complaint about the second kind: failure to comply with a planning condition.
Section 176 could not turn one breach into another
The statutory correction power is broad, but it is not unlimited.
Section 173 requires an enforcement notice to state the matters which appear to constitute the breach and identify which paragraph of section 171A(1) the authority says applies. That matters because the recipient must know the planning case being made against them.
The Inspector concluded that rewriting the windows allegation as a breach of condition would require substantial alteration to the notice and would fundamentally change the nature of the alleged breach.
That could not fairly be achieved by using section 176 as a drafting repair. It risked injustice because the appellant had prepared an appeal against the breach actually alleged, not a different breach which the council might have alleged.
For reference, Planning Geek hosts a current copy of Part VII of the Town and Country Planning Act 1990, including sections 171A, 173, 174 and 176.
The notice also failed the “four corners” test
There was another serious problem: precision.
The recipient of an enforcement notice must be able to understand from the four corners of the notice what breach is alleged and what must be done to comply. In practical terms, that means the notice itself should provide enough information; the recipient should not have to reconstruct the council’s intentions from other documents or later explanations.
Here, the notice did not adequately identify which windows had to be altered or replaced. Although part of the council’s reasoning referred to replacement windows at first- and second-floor level, the notice did not make sufficiently clear which windows in the northern elevation were affected.
The requirement to make windows “fixed shut and obscured” also lacked adequate precision, including what degree of obscurity was required.
That matters because non-compliance with an enforcement notice can lead to criminal liability. The steps required must therefore be clear enough for the person served to know what they have to do.
The notice was invalid and quashed
The Inspector ultimately found that the notice lacked the clarity and accuracy required and could not be corrected without causing injustice.
The enforcement notice was therefore quashed.
Because the notice fell at that preliminary stage, the Inspector did not go on to determine the substantive ground (f) and ground (g) arguments about whether the requirements were excessive or whether more time should have been allowed for compliance.
That procedural outcome is important. The appeal was not a substantive finding that the windows complied with condition 5, nor was it a finding that the rear extension was acceptable in planning terms. It was a finding that this enforcement notice could not lawfully stand in the form in which it had been issued.
This was more than a technical typo
Our analysis: this decision should not be read as encouraging “gotcha” arguments over minor drafting mistakes.
Inspectors can and do correct enforcement notices. The rear-extension description in this very appeal demonstrates that. Calling an extension a conservatory was capable of being repaired because the target of the allegation remained clear and the correction would not have changed the case being answered.
The windows problem was different because it went to the legal character of the alleged breach. A notice alleging unauthorised operational development was being used to address what was actually a potential breach of a planning condition.
That is why our main guide to enforcement notices stresses the importance of identifying the breach accurately, while our guide to enforcement appeal grounds explains why the allegation on the notice determines the case the appellant has to answer.
What the Redbridge appeal shows
An enforcement notice does not have to be drafted with impossible perfection. But it does have to identify the actual breach of planning control clearly enough that the recipient knows what case they face and what must be done to comply.
Where the authority has alleged one statutory type of breach but the real planning complaint is a fundamentally different one, an Inspector cannot always transform the notice into the correct case by using the section 176 correction power.
You can read the full Redbridge enforcement appeal decision APP/W5780/C/25/3369676 hosted by Planning Geek.
Sources: appeal decision APP/W5780/C/25/3369676; sections 171A, 173 and 176 of the Town and Country Planning Act 1990; and the locally hosted current Part VII legislation copy linked above.
Created: 8th September 2026
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