The Buckingham window appeal has ended with a listed building enforcement notice being upheld, even though the council had described the replacement windows incorrectly. Inspector J Moss dismissed the appeal concerning 50 Well Street, Buckingham, on 20 October 2026 and corrected the notice to reflect what had actually been installed.
Two timber casement windows had been replaced with modern aluminium windows at a Grade II listed building. The council’s notice called them UPVC and referred to the earlier windows as original. Both descriptions were corrected, but neither mistake persuaded the inspector that the enforcement action should fall.
For anyone dealing with listed buildings, I think this decision is particularly useful. It separates the accuracy of an enforcement notice from the central question of whether unauthorised works should receive listed building consent. It also shows why the significance of historic fabric matters even where an older feature cannot be proved to date from the building’s construction.
What happened in the Buckingham window appeal?
The notice was issued by Buckinghamshire Council on 5 November 2025 for works at 50 Well Street. The building is part of the Grade II listing covering numbers 49 and 50, recorded under Historic England list entry 1201414. The appeal was determined under section 39 of the Planning (Listed Buildings and Conservation Areas) Act 1990, rather than as an ordinary householder planning appeal.
The notice required the replacement windows on the front elevation to be removed and appropriately detailed timber casement windows reinstated. Its requirements specified narrow integral glazing bars, four panes to each casement, side-hung opening and no trickle vents. The compliance period was three months after the notice took effect.
The appeal relied on ground (e), the contention that listed building consent ought to be granted for the works. There was no ground (b) or (c) challenge alleging that the described works had not occurred or that they did not constitute a breach of listed building control. That distinction limited what the inspector had to decide.
Wrong window material did not invalidate the notice
The original notice described the replacement units as UPVC. The appellant maintained that they were aluminium, and the council ultimately accepted that description. The inspector corrected the allegation and remedy accordingly. He also removed the word ‘original’ from the description of the former timber windows because the council accepted that those windows were not the building’s original windows.
The Buckingham window appeal is therefore a useful warning against treating every misdescription as fatal to enforcement. Under section 41 of the 1990 Act, an inspector can correct or vary a listed building enforcement notice where that will not cause injustice to either party. Here, both sides had addressed the windows actually installed and understood the nature of the alleged breach.
The notice also contained an unfortunate reference to an advertisement, but the inspector did not consider this made the reasons for action unintelligible. He found sufficient information explaining the council’s concern. None of those drafting errors changed the substance of the appeal on listed building consent.
Why timber and aluminium were treated differently
The combined listing for numbers 49 and 50 Well Street dates from April 1973 and identifies the cottages as eighteenth-century buildings with two-light casement windows. The inspector considered the repeated pattern of casements and glazing bars an important part of the building’s historic and architectural interest. That pattern also contributed to the character of the Buckingham Conservation Area.
The appellant had tried to reproduce the appearance and proportions of the earlier windows, including narrow frames and glazing bars. But appearance was not the whole question. The inspector considered the smooth, manufactured finish of aluminium unsympathetic to the natural texture and traditional character of the building’s surviving window joinery.
In the Buckingham window appeal, the inspector also assessed the effect of removing the earlier timber windows. The appellant said the timber frames had been deteriorating, but there was little supporting evidence about their condition. Although those windows were not original, they still formed part of the building’s historic fabric. Replacing them in their entirety had removed that fabric, not merely changed a surface detail.
How national heritage policy was applied
The decision considered the National Planning Policy Framework published in August 2026, including policy HE4 on conserving heritage significance. The parties were invited to comment on the new Framework. The inspector also considered the conservation area’s appearance and the relevant development plan context.
One important lesson from this Buckingham window appeal is that a visually similar replacement is not necessarily an acceptable heritage intervention. Whether a modern frame is slimmer, warmer or easier to maintain may be relevant, but those advantages do not automatically outweigh the loss of historic material or an unsympathetic finish. The assessment starts with identifying what gives the designated heritage asset its significance.
That does not mean aluminium windows are unacceptable in every listed building. The facts here concerned a particular listed pair of cottages, front-facing casement windows and the contribution their construction and detailing made to significance. Different buildings, elevations, past alterations and evidence of window condition could lead to different outcomes.
What was the inspector’s final decision?
The inspector dismissed the ground (e) appeal and refused listed building consent for retention of the unauthorised works. The enforcement notice was upheld with corrections: the reference to UPVC was changed to aluminium, and references suggesting the earlier windows were original were changed to former windows. This was a corrected and upheld notice, not a decision setting the enforcement notice aside.
For owners and advisers, the practical message from the Buckingham window appeal is to investigate the building’s listing, historic photographs, physical fabric and conservation-area context before replacing windows. If repair is said to be impracticable, record the actual defects and the options considered. Where a notice is inaccurate, separate the question of correcting it from the planning and heritage merits of the replacement works.
The formal decision is APP/J0405/F/25/3377082, dated 20 October 2026. The decision can also be consulted via AppealBase. It is an inspector’s appeal decision rather than binding court case law.
0 Comments