The Dunstable three-flat appeal has been dismissed after a Planning Inspector ruled that three proposed flats above former nightclub premises would fail to provide acceptable living conditions, despite the borough’s acknowledged housing land shortfall. The decision was issued on 9th October 2026.
The scheme at 23A High Street North sought to turn first-floor space into three one-bedroom homes. One proposed flat lacked meaningful outlook, while an acoustic report prepared for a different commercial proposal left important questions about future residents’ exposure to noise unanswered.
Inspector H Marriott considered the newly revised National Planning Policy Framework and accepted that using vacant town-centre floorspace for housing had advantages. Those benefits did not override the specific harm identified. If you are designing homes above commercial premises, I would read the full appeal decision, reference 6010670, before relying on a noise report prepared for another use.
Dunstable three-flat appeal: what was proposed
Treebond Limited’s application, CB/25/02819/FULL, proposed three two-person, one-bedroom flats with floor areas between 50 and 61 square metres. Residents would have used an existing rear stairway reached from the passage between numbers 27 and 29 High Street North. The first floor had most recently operated as a bar or nightclub.
The three-storey mid-terrace building sits in the busy centre of Dunstable, among shops, restaurants, banks and other commercial uses. In the Dunstable three-flat appeal, the Inspector recorded that the ground floor had been used as a pool hall and had separately gained an appeal permission in February 2025 to become a bingo hall. It was therefore unsafe to assume that the vacant appearance seen at the September site visit would continue indefinitely.
Although the development in the Dunstable three-flat appeal would add homes within easy reach of services and public transport, the legal test was whether those homes would be acceptable for residents. No party disputed the adequacy of outlook and daylight for flats 1 and 3. The decisive concerns arose from flat 2 and from the evidence about possible commercial noise.
Why flat 2 failed the daylight and outlook test
Flat 2 combined its living, cooking and sleeping areas into an open-plan space. Of its two proposed windows, one was high-level and obscure-glazed. The second was clear, but positioned in the corner of the room. In the Dunstable three-flat appeal, the Inspector considered that the first offered no meaningful outlook and the second did too little to distribute light or create an acceptable external view.
A window schedule showing that habitable rooms have glazing is not equivalent to demonstrating a good living environment. Here, the layout and placement of windows mattered as much as their existence. The internal corridor was also without natural light because of the building’s position within the terrace.
In the Dunstable three-flat appeal, the Inspector described the proposed accommodation as a poor standard of living environment. That finding does not mean every open-plan flat, high-level window or converted upper floor is unacceptable. It means the specific evidence failed to demonstrate adequate conditions for the people who would actually live in this arrangement.
Developers assessing conversion potential should therefore test each flat, rather than rely on the gross floor area, a nominal window count or the fact that neighbouring commercial conversions have previously been approved.
Noise evidence needed to address the actual residential layout
The appellant had provided an acoustic assessment, but it appeared to have been commissioned for an earlier proposal involving a bar or restaurant and rooftop bar. In the Dunstable three-flat appeal, the Inspector could not be satisfied that it evaluated the proposed flats, their orientation, internal layout or likely noise exposure.
A preliminary sound-insulation report suggested that separation between the floors could comply with Building Regulations. That did not establish the effectiveness of the proposed residential scheme as a planning matter. In particular, the decision identified insufficient information about ventilation and whether windows would need to open for occupants to use their homes comfortably.
The distinction matters because a ground-floor commercial use might return and generate different types or patterns of noise. A noise survey, and any proposed mitigation, must address plausible operating conditions as well as the residential design being applied for. For this appeal the Inspector would not rely on an unspecified future planning condition to resolve an impact that had not been satisfactorily assessed.
The council had approved a neighbouring conversion at 25 to 27 High Street North. However, its noise assessment was specific to that scheme. The Inspector refused to transfer that approval or its evidence to the appeal building simply because of their proximity.
Amenity space and the conservation area
Central Bedfordshire’s 2023 Design Guide expects communal or private outdoor amenity provision. None was offered for the proposed flats. The Inspector recognised the practical constraint of converting an existing town-centre building and said that the absence of outdoor space would not necessarily decide the appeal by itself.
It nevertheless added weight to the adverse living-conditions assessment, particularly where flat 2 also lacked satisfactory daylight and outlook. This is an important cumulative issue: a limitation that might be tolerable in isolation can become significant when occupants have no compensating outside space.
The property falls within Dunstable Conservation Area. That heritage designation did not sink the proposal. The changes to the rear windows were modest and the Inspector found they would preserve the conservation area’s character and appearance. The decision distinguishes clearly between a scheme’s acceptable external heritage effect and its unacceptable internal residential environment.
Chilterns Beechwoods payment secured, but it was not enough
The appellant completed a unilateral undertaking on 30th September 2026 to secure financial contributions mitigating recreational pressure on designated European habitat sites, including the Chilterns Beechwoods Special Area of Conservation. The payments covered strategic access management and monitoring, known as SAMM, and suitable alternative natural greenspace, known as SANG.
Central Bedfordshire Council accepted that this addressed its relevant reason for refusal, and the Inspector had no reason to disagree. Natural England also accepted the secured contributions for the proposed mitigation. The point should not be misreported as an appeal lost for lack of an ecological agreement.
The Inspector did not carry out a full appropriate assessment because the appeal was being dismissed for unrelated reasons. The undertaking resolved one dispute, but it could not cure the shortcomings of the accommodation. For applicants, planning obligations and acceptable living conditions are separate tests requiring separate evidence.
How the August 2026 NPPF affected the balance
The decision expressly applied the Framework published on 17th August 2026. Policies S3 and S4 support sustainable development and create a presumption favouring proposals in settlements unless adverse effects substantially outweigh their benefits when assessed against the national decision-making policies.
That support was material. The council could not demonstrate a five-year supply of housing, and the Inspector gave substantial weight to the small contribution these flats would make to housing need under policy HO7. Reuse of vacant town-centre accommodation, sustainable travel opportunities and temporary construction employment also counted in favour.
However, policy L2’s support for development in settlements does not excuse unacceptable living standards. The decision identifies conflict with L2, policy DP3 on well-designed places, and policy P3 on pollution and living conditions. It also records conflict with Central Bedfordshire Local Plan policies CC8 and HQ1.
The Inspector found that the accumulated harm to future residents substantially outweighed the scheme’s benefits. This was not a rejection of town-centre housing as a principle. It was an evidence-based refusal of this particular three-flat layout. The distinction is especially relevant as developers seek to make commercial upper floors work harder for residential supply.
Practical consequences for conversion schemes
An applicant preparing a comparable submission should align the plans, daylight or outlook analysis, ventilation strategy and acoustic assessment with the same precise proposed flats. Evidence commissioned for a different commercial layout may not answer the right planning questions even if it contains competent technical work.
The case also suggests that concessions on one reason for refusal will not necessarily shift the overall balance. The ecological obligation was completed before the appeal decision, but the unresolved matters of residential amenity still required dismissal. Readers can inspect the Planning Inspectorate appeal record alongside the decision text.
For consultants considering a revised proposal after a dismissed planning appeal, the obvious focus would be whether the living arrangements can be redesigned to achieve meaningful outlook, light and workable noise control, supported by scheme-specific evidence. The Inspector made no finding that a different layout could never succeed. That question would depend on the next application, its plans and the evidence submitted.
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