This case concerned an appeal against the refusal of planning permission for the conversion of a single dwellinghouse into an eight-person house in multiple occupation (HMO) in the London Borough of Hillingdon.
HMOs with seven or more occupants fall outside the C4 use class and are treated as sui generis, meaning that planning permission is required in all areas, regardless of whether an Article 4 direction is in place.
Applications for larger HMOs are therefore often scrutinised closely by councils, particularly in relation to neighbour amenity and potential noise and disturbance.
In this case, the council refused permission on the basis that the proposed HMO would result in unacceptable impacts on neighbouring residents. Following a written representations appeal, the planning inspector disagreed and allowed the appeal, granting planning permission.
The proposal
The appeal related to an existing residential property within an established residential area. The proposal involved no external alterations to the building and no increase in its overall scale or footprint. The scheme focused instead on the change of use of the property to accommodate eight unrelated occupants, together with internal alterations to provide bedrooms and shared facilities.
As is common with HMO proposals of this size, the main issue was not the physical appearance of the building, but whether the intensity of occupation would give rise to planning harm.
The council’s reason for refusal
The council refused the application on the grounds that the proposed use would lead to an unacceptable level of noise and disturbance to neighbouring occupiers, contrary to policies DMH 5 and DMHB 11 of the Hillingdon Local Plan.
The officer’s report expressed concern that the comings and goings associated with eight occupants, together with shared living arrangements, would materially harm the living conditions of nearby residents. No objections were raised in relation to parking, highway safety, or the physical form of the building.
The main issue on appeal
The inspector identified a single main issue: whether the proposed eight-person HMO would result in unacceptable noise and disturbance to neighbouring residents, having regard to the relevant development plan policies.
This framing is important. The appeal did not turn on whether HMOs are acceptable in principle, nor on concentration levels or policy thresholds, but on a site-specific assessment of likely amenity impacts.
The inspector’s assessment
In allowing the appeal, the inspector placed significant weight on the absence of substantive evidence to support the council’s concerns.
The inspector noted that the proposal involved no external alterations that would intensify activity in outdoor areas; the council had not identified any specific characteristics of the site that would make it unusually sensitive to noise; and there was no evidence that an eight-person HMO would, in itself, generate materially greater disturbance than other forms of lawful residential occupation.
The inspector also observed that noise and activity associated with residential use is not, by definition, harmful, and that planning decisions must be based on a realistic assessment of likely impacts rather than generalised assumptions about HMOs.
Importantly, the inspector concluded that the council’s concerns were speculative, and that there was insufficient justification to withhold permission on amenity grounds alone.
Why this appeal succeeded
This appeal succeeded because it addressed a common problem in HMO decision-making: generalised concern unsupported by evidence.
While councils are entitled to control HMOs where genuine harm would arise, refusal must be based on clear, site-specific reasoning. In this case, there was no physical overdevelopment, no identified history of noise issues, and no policy breach that could be clearly demonstrated.
The appeal outcome reinforces the principle that HMOs are not inherently unacceptable, even at larger scales, and that planning judgments must be grounded in evidence rather than assumption.
Key lessons for HMO applicants
This case highlights several points that frequently arise in HMO appeals.
Larger HMOs will often be refused on amenity grounds, particularly noise and disturbance.
Councils must demonstrate why a particular property or location would suffer unacceptable harm.
Inspectors will scrutinise whether refusal reasons are supported by evidence or rely on generalised perceptions of HMOs.
Well-prepared appeals that focus on policy wording and evidential gaps can be highly effective.
Need advice on an HMO refusal?
We regularly advise on and appeal refusals for HMOs of all sizes, including schemes involving seven or more occupants and sui generis uses.
If your HMO application has been refused, or you are considering an appeal and want an honest assessment of your prospects, please get in touch.
You should also check out Martin Gaine’s book, Planning for HMOs, which is a great guide to HMOs and the planning system.
This post explains more on how councils are generally become more hostile to HMOs.
Don’t miss our dedicated page on planning appeals in Hillingdon.
