Harrow enforcement appeal quashes three-flat conversion notice

A Harrow enforcement appeal has succeeded after an Inspector decided that the Council had not established that a house and its outbuilding were being used as three separate homes. The enforcement notice, requiring extensive changes and demolition, was quashed on 8th October 2026.

The notice related to 223 Burnt Oak Broadway, Edgware. Harrow alleged a material change of use from a single-family house to three residential units, including an outbuilding used as a third flat. Its requirements included ending the flat use, removing kitchens, bathrooms and internal partitions, and demolishing the rear outbuilding.

Inspector M Ollerenshaw allowed the linked appeals under ground (b), finding on the balance of probabilities that the alleged change to three independent dwellings had not occurred. The decision illustrates the evidential burden councils face when an enforcement notice asserts actual residential use rather than simply the existence of facilities capable of supporting separate occupation.

Harrow enforcement appeal succeeds on the alleged breach

The two appeals, references APP/M5450/C/25/3362349 and 3362350, challenged the same notice issued on 11th February 2025. They were brought by separate appellants but determined together because the enforcement action concerned one property and the same alleged breach.

Harrow’s allegation was specific: without planning permission, the land had changed from a single-family dwellinghouse into three residential units, with the outbuilding accommodating the third unit. That is different from alleging merely that unauthorised works had been carried out or that a building might be capable of separate occupation.

The Inspector found that the evidence did not prove three self-contained dwellings were actually in use. Ground (b) permits an appellant to argue that the matters alleged in an enforcement notice have not occurred as a matter of fact. Where that ground succeeds, the notice cannot survive simply because the local authority remains concerned about the configuration of the property.

Why kitchens and partitions were not conclusive

The notice demanded removal of kitchens and bathrooms beyond the quantities the Council considered consistent with a single dwellinghouse. It also required removal of partitions facilitating independent residential units. But the decision stresses that accommodation and fittings must be assessed alongside evidence of how they were used.

The Council had not produced substantive evidence of separate residential activity, tenancy agreements, rent receipts, distinct utility arrangements or actual occupation of the various spaces as independent dwellings at the relevant time. The Inspector recognised that the relevant parts of the house and the outbuilding had at some point contained facilities consistent with independent use.

That observation did not establish the factual allegation in the notice. By the time of the relevant evidence, some facilities appeared to have been removed. The question was not whether the building could be converted or whether its physical layout created suspicion, but whether the alleged material change of use was more likely than not to have taken place.

The Inspector also addressed the reliability of the appellants’ own accounts. Uncorroborated evidence does not automatically fail merely because it comes from a person with an interest in the outcome. If there is no evidence that contradicts it or renders it improbable, there may be no sound reason to reject it.

The outbuilding did not establish a third dwelling

The outbuilding was central to Harrow’s case because the notice alleged it had been used as a third residential unit. However, the Inspector considered the absence of credible evidence that it had actually operated independently of the main building.

A previous permission, reference PL/0408/24, had authorised ancillary use of the outbuilding. The Inspector found the evidence consistent with the outbuilding remaining ancillary to the principal home, rather than being a separate dwelling. That distinction matters in planning law: independent residential occupation involves more than the physical capacity to provide sleeping, washing and cooking facilities.

It does not follow that every residential-looking outbuilding is lawful. Another site could have tenancy records, separate postal addresses, independent accesses, occupants or other evidence supporting a finding that an additional planning unit had been created. On this evidence, however, the local authority’s particular allegation had not been established.

What ground (b) means in enforcement practice

Section 174(2)(b) of the Town and Country Planning Act 1990 provides an appeal ground where the breach alleged in the enforcement notice has not occurred. It is not the same as arguing that a breach has become immune from action through the passage of time, nor does it ask whether planning permission should be granted for the development.

The appellants had also raised grounds concerning the lawfulness of the works, service or steps and time allowed for compliance. The Inspector did not need to determine the remaining grounds after finding that the core allegation was wrong.

This approach demonstrates why the first task when reviewing an enforcement notice is to identify the exact wording of the alleged breach. Evidence directed towards a different possible breach may not rescue the notice actually issued. An enforcement case should be tested against the allegation as drafted, the land described and the relevant facts at the date of issue.

For planning authorities, the decision underlines the importance of obtaining and documenting use evidence before alleging a material change. For appellants, it demonstrates the value of a clear chronology, photographic evidence, occupation information and reliable explanations of how each room or building has been used.

Demolition requirement falls with the notice

Harrow’s notice sought not only cessation of any separate flats, but also significant physical changes and the demolition of the outbuilding. Such requirements can have serious financial consequences. However, they depended on an enforceable notice correctly identifying the alleged breach of planning control.

As ground (b) succeeded, the Inspector quashed the whole notice. She did not grant a planning permission for three flats and did not decide that independent use of the outbuilding would be acceptable. The conclusion was narrower: the particular material change of use alleged had not been proved.

The decision is important when assessing the relationship between the alleged use and remedial requirements. An authority should ensure that its steps are directed at remedying an established breach, rather than assuming the existence of separate homes from the mere presence of amenities.

Practical implications and appeal documents

Before responding to enforcement action, identify whether the notice alleges operational development, a change of use, breach of condition or a combination. Each engages potentially different facts, dates and appeal grounds. In a case involving purported subdivision, obtain evidence of who occupied each part of the building, on what basis, and whether the household arrangements amounted to separate planning units.

Parties should also examine historic permissions. An outbuilding authorised for ancillary purposes may explain its existence, but that consent does not authorise an independent flat. Equally, its construction does not itself prove that unauthorised occupation has occurred.

The decision is appeals APP/M5450/C/25/3362349 and 3362350, dated 8th October 2026. The Planning Inspectorate case record provides an official appeal route. Read alongside section 174 of the Town and Country Planning Act 1990 and Planning Geek’s planning enforcement guidance.

This is an Inspector decision on its facts, not binding case law. It does not establish that all internal subdivisons or ancillary buildings escape planning control. It is a reminder that enforcement conclusions depend on reliable evidence, correct allegations and the actual use of land.