A Barnet enforcement notice was upheld on 23rd October 2026, even though its requirements no longer had effect against the extension it targeted. Inspector Stephen Hawkins dismissed an enforcement appeal concerning 65 Brackenbury Road, East Finchley, London N2, because a separate, later planning permission had changed the legal position.
The notice required substantial changes to a single-storey side and rear infill extension built differently from an earlier approved scheme. The owner wanted more time to comply, but a successful planning appeal in February had already authorised the extension as built. Section 180 of the Town and Country Planning Act 1990 therefore made the compliance period an academic issue.
I think the Barnet enforcement notice is worth examining because its formal result is easily misunderstood. The enforcement appeal was dismissed and the notice upheld. That did not mean the council could still require the permitted extension to be altered in the ways set out in the notice.
What the Barnet enforcement notice required
Barnet Council issued the notice on 11th November 2025. It alleged that the owner had constructed a single-storey side and rear infill extension otherwise than in accordance with planning permission 24/5251/HSE. The property is a two-storey mid-terrace house on Brackenbury Road.
The council wanted rendered brick or block external walls replaced with red brick matching the original house, including its bond and pointing. It also required the south-west facing flank wall to be lowered and the roof remodelled to match the earlier approved plans. The notice gave three months to complete the required works.
The owner’s challenge under section 174(2)(g) did not ask Inspector Hawkins to grant permission or re-examine the appearance of the extension. Ground (g) concerns whether an enforcement notice allows a reasonable period for compliance. The appellant asked for nine months rather than three.
On its face, that is a conventional argument about the time and practical work needed to comply with a notice. What made this Barnet enforcement notice unusual was the decision issued on a different planning appeal before the enforcement appeal was determined.
February permission authorised the extension
On 10th February 2026, a separate section 78 appeal, reference 6001599, allowed retrospective planning permission for the extension and several other alterations. The proposal included a first-floor rear extension, two front rooflights and an alteration to the roof of an existing rear outrigger. The relevant Barnet application reference was 25/3064/RCU.
The earlier appeal decision records that the development had already been constructed and that the built works matched the submitted drawings. The permission required compliance with plans GDP300/101 and GDP300/102. It was granted by Inspector L McKay, who had considered a site-visit report prepared by planning officer Rachel Higgins. The February decision and the October enforcement decision were separate proceedings with different inspectors.
There is an important twist in the February decision. The earlier Inspector accepted that the extension materially harmed the outlook and daylight enjoyed by neighbouring No 63, conflicting with relevant development plan policies. However, a similar scheme had already been permitted in March 2025 under reference 24/5251/HSE.
Because that approved alternative could credibly have been implemented and would have caused substantially similar effects, the Inspector gave the fallback considerable weight. Permission was therefore allowed despite the identified neighbour impact. That February permission, rather than the October enforcement appeal, changed the legal effect of the Barnet enforcement notice.
Section 180 and the Barnet enforcement notice
Section 180(1) of the Town and Country Planning Act 1990 deals with a situation in which planning permission is granted after an enforcement notice has been served for development already carried out. The statutory consequence is limited but powerful: a notice ceases to have effect so far as it is inconsistent with that subsequent permission.
Inspector Hawkins found that the February permission covered the single-storey infill extension identified in the notice. In the 23rd October decision, he explained that the compliance period question had become “academic”. His fuller finding was: “The notice requirements have no effect against the permitted extension” (Planning Inspectorate, Open Government Licence v3.0).
The dispute over whether three or nine months was reasonable therefore did not need to be resolved. The later consent had already displaced the notice’s requirements so far as they related to the authorised extension.
That is not the same as declaring the original notice unlawful. Section 180 does not automatically wipe out every allegation or requirement in a multi-part notice. The extent of its effect depends on what the later permission actually authorises and how that permission compares with the notice.
There is another important qualification in section 180(3). Where a notice ceases to have effect, that does not in itself remove liability for an offence arising from an earlier failure to comply. Nothing in this Barnet enforcement notice decision establishes that any such prosecution occurred; the point is a statutory safeguard against reading too much into a later permission.
Why the enforcement appeal still failed
The Inspector dismissed the ground (g) appeal and upheld the notice because there was no practical question remaining about whether its three-month compliance period should be extended. He did not replace the notice’s deadline with nine months. Nor did he grant any new planning permission on 23rd October.
For anyone checking the outcome on an appeal database, the distinction matters. A bare entry reading ‘notice upheld’ is procedurally correct, but it misses the crucial section 180 finding. In this particular case, the Barnet enforcement notice remained formally upheld while its requirements had no effect against the subsequently permitted extension.
Practitioners should be equally careful with the reverse assumption. A later permission for something similar is not necessarily enough. One has to establish whether the exact development targeted by the notice is covered by the scope of the permission, its approved plans and any conditions.
What practitioners should check
First, set the chronology out clearly: date of the notice, precise alleged breach, required steps, subsequent permission and the built development. The Barnet enforcement notice was served in November 2025, the second planning appeal succeeded in February 2026, and the ground (g) enforcement appeal was determined in October 2026.
Second, compare the drawings rather than relying on short descriptions of development. The February Inspector expressly treated the retrospective proposal as the work already implemented and tied permission to two specified plans. Those details helped establish why the requirements to remodel that extension were inconsistent with the later consent.
Third, identify exactly which appeal ground remains live. Ground (g) is about time for compliance. Where the notice’s requirements have lost their operative effect for the development in question, an argument about how long the works might take may no longer serve a practical purpose.
Finally, do not mistake a favourable practical outcome for a successful appeal in law. The notice may remain on the enforcement register. Other requirements, unrelated breaches or liabilities must be assessed separately rather than assumed to disappear.
How this compares with the Cuckfield case
This result follows another Planning Geek report on the Cuckfield enforcement notice and two earth bunds, also involving section 180. At Cuckfield, later permission made requirements concerning approved earthworks ineffective in a ground (a) case. At Brackenbury Road, the decisive point arose in a ground (g) challenge to the compliance period.
The shared lesson is not that every enforcement notice fails once planning permission is issued. It is that the operative requirements must be read against the later grant, while keeping the formal appeal outcome separate from the practical effect. That makes the Barnet enforcement notice a useful procedural example, despite involving a single householder extension.
The Planning Inspectorate record for enforcement appeal APP/N5090/C/25/3376212 gives the 23rd October decision. The earlier retrospective permission is appeal 6001599, decided on 10th February 2026. Our planning enforcement guide explains notices, appeal grounds and the usual process. The appeal decision is also available on AppealBase.
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