The Birmingham dormer appeal has failed after two property owners could not prove that a hip-to-gable roof conversion was substantially completed early enough to escape enforcement. An inspector upheld Birmingham City Council’s notice on 20 October 2026, requiring removal of the rear dormer, hip-to-gable addition and front rooflights.
The decision concerns 36 Miall Road, Birmingham, and turns on evidence of when the works were completed, not whether the finished conversion looks acceptable. The owners said the roof works were finished in January 2021; the inspector found their documents did not establish that claim on the balance of probabilities.
For homeowners and planning advisers, the point is easy to underestimate. A claimed construction date may sound plausible, but an enforcement immunity appeal depends on precise, consistent evidence identifying when the relevant operations were substantially complete.
Why the Birmingham dormer appeal was dismissed
Birmingham City Council served an enforcement notice on 27 February 2025, alleging unauthorised construction of a hip-to-gable loft conversion, rear dormer and front rooflights. The notice required the roof extensions and rooflights to be demolished or removed and the roof restored to its former condition, with six months allowed for compliance.
Two appeals, references 3362979 and 3362981, were made under section 174 of the Town and Country Planning Act 1990. Inspector M Savage ultimately dealt with both on ground (d), which is concerned with whether enforcement was legally out of time when the notice was issued.
The appellants also initially tried ground (a), which would have allowed the planning merits to be considered through a deemed planning application. The Planning Inspectorate had informed them in March 2025 that ground was barred in this particular procedural history, involving a related application made within the relevant two-year period. They did not challenge that position.
As a result, the inspector could not weigh the owners’ assertion that the building work was of a high standard. The Birmingham dormer appeal was a legal timing dispute, not a fresh determination of the architectural merits.
The four-year rule still mattered for older works
The case illustrates an important transitional distinction in England’s planning enforcement legislation. Under section 171B of the 1990 Act, the relevant period for certain unauthorised operational development was historically four years from substantial completion. For breaches occurring on or after 25 April 2024, the relevant period is ten years.
The inspector applied the four-year period to the asserted 2020 to 2021 building works. Because the notice was issued on 27 February 2025, the owners needed to show substantial completion by 27 February 2021 for the legal ground to succeed.
That is not a rule that any building becomes immune simply because the owner says construction began more than four years ago. Completion, rather than commencement, is the relevant issue; and the applicable period depends on when the breach occurred. Advisers should not transpose this appeal’s deadline to works started under the later legislative regime.
Contradictory chronology undermined the case
The owners asserted that the development started towards the end of November 2020 and was completed in January 2021. The inspector said the evidence did not explain what they meant by completed, how much of the structure was then in place, or whether any internal elements remained outstanding afterwards.
The Birmingham dormer appeal was particularly affected by an earlier drawing titled ‘Location Plan for School Rd Conservation’, dated October 2023. That document discussed a separate 2021 prior approval application for a single-storey rear extension and suggested the owners believed the loft work fell within permitted development because of the rear extension decision.
The inspector read that account as suggesting a sequence in which the rear extension application decision preceded the dormer conversion. Birmingham City Council had confirmed on 19 July 2021 that prior approval was not required for the rear extension. That date was after the claimed January 2021 completion and within four years of the enforcement notice.
The inspector did not find a reliably established construction sequence sufficient to prove immunity. The problem was not that the council had produced a definitive photograph showing the exact construction day. It was that the appellants’ own evidence did not prove the earlier date on which their case depended.
Prior approval for another project did not settle the roof’s status
A separate rear extension approval or confirmation that prior approval is unnecessary does not automatically establish that a dormer, roof conversion or different set of building operations is permitted development. Each proposal must satisfy the relevant legislation and any applicable restrictions on its own facts.
The owners referred to dealing with building control through ACIVICO and to plans being registered and approved. The decision records that the evidence did not make clear when those building control documents were registered or approved. Nor were there contemporary invoices, receipts or similar documents establishing the date on which the disputed roof works were substantially complete.
Building Regulations approval, where obtained, is not itself planning permission or a certificate of lawful development. Nonetheless, dated building control inspection records, photographs and invoices can be useful evidence of construction progress and completion when assembled into a coherent chronology.
What evidence would have helped?
The inspector required the appellant’s evidence to be sufficiently precise and unambiguous to satisfy the civil standard, the balance of probabilities. In practical terms, useful material might include dated photographs of the finished roof, contractor completion records, invoices tied to the dormer and gable work, dated inspection reports and reliable independent testimony explaining precisely what was finished.
No single category of document guarantees a successful appeal. It must be possible to connect each record to the operational development alleged, rather than to unrelated works at the same property. Records which show that a rear extension was considered in July 2021 cannot simply be treated as proof that a different loft conversion was finished in January.
In this Birmingham dormer appeal, that distinction was decisive. The inspector found the claimed completion date unsupported and the chronology unclear. He concluded that the legal burden had not been discharged, dismissed both ground (d) appeals and upheld the enforcement notice.
The practical lesson for enforcement advice
Before running a time-limit case, write down the exact alleged breach, the notice date, the relevant limitation period and the date by which substantial completion must be proved. Then challenge the client’s proposed timeline against all the documents, including material produced for other applications.
Where a previous application could affect the grounds available, check that procedural history before lodging an appeal. A barred ground (a) cannot be treated as a safety net allowing a debate about design if a ground (d) evidence case fails. And be candid about missing corroboration: an assertion about the quality of the work is not evidence of its date.
The Birmingham dormer appeal is also a reminder that historical photographs, survey records and building control material should be collected while they remain available. Reconstructing events years later from an incomplete archive is far harder than preserving a contemporaneous record.
The decision can be checked through the Planning Inspectorate case record and is also available via AppealBase, references 3362979 and 3362981. Planning Geek’s enforcement notices guide explains the different statutory appeal grounds and their deadlines.
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