Esher flats have won two linked appeals allowing 16 homes in neighbouring office buildings on Portsmouth Road, Surrey. Inspector E Everitt granted prior approval on 14th October 2026 for seven flats at Thames House and nine at Thames Mews, overturning Elmbridge Borough Council’s refusals.
The dispute centred on whether every habitable room would receive adequate natural light. The inspector accepted the submitted evidence, including daylight in all such rooms and sunlight reaching the main living rooms. The Esher flats are office conversions under Class MA, rather than permission for a new housing block.
I would pay attention to both halves of that finding. The inspector did not say that light quality can be ignored, or that a bright living room automatically cures every poorly lit bedroom. The approvals rest on the evidence for these particular layouts, with separate conditions still controlling how each conversion proceeds.
Why the Esher flats passed the natural-light test
Appeals 6009254 and 6009251 concern applications 2026/0175 and 2026/0176 respectively. Both buildings are three-storey offices, with undercroft parking at Thames House. BH Esher 2025 Ltd proposed changing them from commercial use to homes under England’s Class MA permitted development route.
Class MA allows qualifying commercial buildings to become dwellings, but the applicant must obtain the required prior approval before beginning. The authority considers specified matters, including whether all habitable rooms will have adequate natural light. It is a narrower assessment than an ordinary full planning application.
For the Esher flats, the council did not dispute that adequate daylight would reach all habitable rooms. Its concern was sunlight: it argued that natural light includes both daylight and sunlight, and that insufficient sunlight in some rooms meant the test was not met.
The distinction matters. Daylight illuminates a room even without direct sun entering it; sunlight describes direct exposure to the sun. A room can therefore have useful daylight while receiving limited direct sunlight, depending on orientation and surrounding buildings.
The inspector said no specific authority had been provided for the council’s position that adequate sunlight must be achieved in every habitable room. However, the inspector also recognised that a dwelling which is reasonably well lit overall might still fail Class MA if individual habitable rooms lack adequate natural light.
In both decisions, the submitted assessment showed adequate daylight throughout the habitable rooms. All flats had south-facing living rooms receiving at least 1.5 hours of sunlight on 21st March, consistent with the recommendations discussed from the Building Research Establishment’s daylight and sunlight guide.
The guide was treated as guidance, rather than a separate statutory rule. The inspector had extracts of the guide, rather than the complete document. The inspector used those extracts to inform the assessment, alongside the reports and the circumstances of the buildings.
For Thames House, the inspector concluded that the rooms would “benefit from adequate natural light overall”. The same conclusion was reached for Thames Mews. That satisfied the relevant prior-approval requirement in each appeal.
A different layout from the council’s earlier example
The Esher flats decisions distinguish a previous appeal cited by the council, which included two single-aspect north-facing flats. Thames House would have no single-aspect north-facing flats, and Thames Mews placed living spaces on the south-facing side, with bedrooms generally facing north.
That does not turn the decisions into a blanket approval for north-facing bedrooms. Adequate daylight was established in all habitable rooms here. I would avoid presenting the result as a shortcut that makes orientation, room depth or window arrangements unimportant.
The legally relevant category also has a specific meaning. Habitable rooms include rooms for sleeping or living, but exclude rooms used solely for cooking and spaces such as bathrooms, corridors, laundry rooms and utility rooms. A kitchen combined with living space therefore needs careful consideration.
The actual test sits in Class MA.2(2)(f), alongside the refusal requirement in paragraph W(2A) and the definition in paragraph X. The official Part 3 legislation is the starting point for checking those provisions.
What the approvals do and do not authorise
Local representations raised density, character, privacy, outlook and the combined effect of the two schemes. The inspector explained that matters outside the specified Class MA prior-approval topics could not determine these appeals.
For the Esher flats, no external building operations were proposed. The inspector said the buildings’ height and appearance would not change and works would be limited to internal alterations. At Thames House, bin and cycle structures mentioned in the officer report were already in place when the inspector visited.
At Thames Mews, some existing floor areas had been labelled unsurveyed. The inspector accessed all sections during the site visit and found two in office use, with the other two vacant after previous office occupation. That evidence helped establish the factual position rather than leaving the labels unresolved.
Residents also questioned whether some of the larger flats might become shared houses in Class C4. The inspector made clear that Class MA permits the change to Class C3 dwellings. These approvals do not authorise an alternative use simply because a flat could accommodate several people.
Separate conditions for the two buildings
Both approvals require the approved plans to be followed. They also require contamination assessment and surface-water drainage details to be approved before development starts. Parking and cycle spaces must be provided before occupation and retained afterwards.
Thames Mews has additional pre-occupation requirements for an approved Waste Management Plan and implementation of the noise assessment’s recommendations. Thames House has five express conditions; Thames Mews has seven. Reading one schedule and assuming it covers both would be a mistake.
The inspector declined some suggested conditions, including electric vehicle and e-bike charging requirements that the inspector considered insufficiently related to the transport impact. For Thames House, separate waste-management conditions were not justified by the evidence and arrangements already submitted.
Class MA also imposes its own completion requirement: development must be completed within three years of prior approval. The inspector therefore did not add the council’s suggested time-limit condition. That is a completion deadline, which should not be confused with a standard permission requiring work merely to begin within three years.
The evidence comes before the conclusion
I would use the Esher flats outcome to focus a conversion appraisal on the actual statutory tests and evidence for each room. A general claim that the building has plenty of windows is weaker than a report showing how the proposed layout performs.
The inspector expressly said future office conversions must be judged on their own circumstances. These are useful appeal decisions explaining an approach, rather than court judgments establishing a universal rule.
Read the full official decisions and conditions for Thames House and Thames Mews. They identify the reports relied upon and the different requirements attached to each approval. For another recent Class MA decision, see the Rushden flat appeal.
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