Appealing a prior approval refusal under Class MA

A Class MA prior approval refusal is narrower than an ordinary refusal, and that cuts both ways. The authority can only refuse on the matters the General Permitted Development Order 2015 allows it to consider, so a refusal founded on affordable housing, amenity standards generally or loss of employment floorspace in the abstract is outside its powers. But where the refusal rests on inadequate natural light, the Order requires refusal, and no amount of appeal advocacy will save it.

So the first task after a refusal is to sort the reasons into those the authority was entitled to give and those it was not.

What prior approval under Class MA covers

Class MA of Part 3 of Schedule 2 to the Order permits the change of use of a building from Class E commercial, business and service use to Class C3 dwellinghouses, subject to conditions and to prior approval from the local planning authority.

The right has limits before you reach the prescribed matters. The building must have been in Class E use for a stated period before the application, and the qualifying conditions have been amended more than once, including the removal of the floorspace limit in 2024, so read the current consolidated text rather than a summary from when the right was introduced.

The right also does not apply at all to a listed building or a scheduled monument, or on land in certain designations, and it can be removed by an Article 4 direction. Check for a direction before anything else, because a refusal on that basis is unanswerable.

One further point catches people out. Class MA permits the change of use, not the works. External alterations, new windows, extensions and rooftop additions need their own permission, and a scheme that depends on them needs a full application alongside or instead.

The matters the authority may consider

The Order lists the matters for prior approval, and they are the whole of the authority's remit. In outline they cover transport and highways impacts including safe site access, contamination risk, flood risk, the effects of noise from nearby commercial premises on the future residents, the impact of introducing residential use into an area the authority considers important for industry, storage and distribution or waste management, the character and sustainability of a conservation area where the change affects the ground floor, and the provision of adequate natural light in all habitable rooms.

A condition of the right also requires the new dwellings to meet the nationally described space standard, which is enforced as a condition rather than assessed as a prescribed matter.

Three consequences follow for an appeal.

An inspector will not entertain a refusal reason outside the listed matters, so identify any such reason and say so plainly in the statement of case.

The matters are framed around protecting future residents and existing businesses, not around planning merit generally, so the evidence has to be directed at those specific risks.

And where a reason is within the matters but unevidenced, the ordinary position applies: the authority has to substantiate it.

Refusals on daylight and noise

These are the two reasons that succeed most often, and they need different answers.

Natural light is the hard one. The Order requires the authority to refuse where adequate natural light is not provided in all habitable rooms, which means a single windowless habitable room defeats the application. The remedy is design rather than argument: reconfigure so that every habitable room has a window, accept fewer units, or designate deep spaces as non-habitable in a way the layout properly supports.

Where light is provided but its adequacy is disputed, modelling settles it. A Daylight and Sunlight Assessment using the current illuminance based approach, room by room, is far more persuasive than a schedule of window areas. Councils normally expect a suitably qualified assessor and professional review is strongly advised.

Noise from commercial premises is about the effect on future occupiers. The evidence needed is a survey at the relevant facades over a period covering the operating hours of the neighbouring uses, an assessment against internal criteria, and a mitigation scheme covering glazing and ventilation that does not depend on windows being open. Where the mitigation requires mechanical ventilation, show that the plant fits and that its own noise has been assessed.

Refusals on the qualifying conditions

A refusal that the building does not qualify is a different kind of problem, because it is a question of fact rather than judgement.

The evidence that answers it is documentary. Leases and tenancy agreements, business rates records, utility accounts, photographs with dates, accounts showing trading, and correspondence with agents. Assemble it as a chronology with an exhibit reference for each document rather than as a narrative.

Where the authority has misread the current version of the right, quote the current text and the amending instrument. Where the facts are plainly against you, do not appeal, because an inspector cannot grant prior approval for a building outside the class.

Appealing on the limited grounds available

The appeal is a section 78 appeal against refusal of prior approval, lodged within six months of the decision, and normally determined by written representations at this scale.

Structure the statement around the prescribed matters in the order the Order lists them, one heading each. Under each, state the authority's reason if it gave one, the evidence, and the conclusion. Where the authority gave no reason under a matter, say that the matter is not in dispute. That structure makes the inspector's task mechanical and is the approach set out in our note on writing a statement of case an inspector can use.

Two procedural points. Where the authority failed to determine the application within the statutory period the position differs from a refusal, and the deemed approval provisions in the Order need checking against the facts and dates. And new evidence at appeal is allowed but not always welcomed, particularly where the authority never had the chance to consider it, as our note on new evidence at appeal explains.

Illustrative example: a refusal citing inadequate natural light in two of eleven proposed flats, noise from an adjoining late opening restaurant, and the loss of office floorspace. The third reason fell outside the prescribed matters. Modelling showed nine units comfortably compliant, the two disputed units were redesigned into one larger dual aspect flat, and an acoustic scheme with mechanical ventilation answered the noise point. The circumstances are illustrative and used to show how the reasons are separated.

Evidence that answers each matter

A short checklist, one item per matter:

1. Transport: parking provision or a parking stress survey, cycle storage, refuse storage and collection arrangements, and safe access to the highway.
2. Contamination: a desk study for a building with a relevant history, with intrusive investigation where the desk study indicates it. Land contamination work requires a suitably qualified and experienced person, and an AI-assisted draft is a starting point for that professional rather than a substitute.
3. Flooding: the flood zone, the floor levels of the proposed dwellings, and safe access where relevant.
4. Noise: survey, internal criteria, glazing and ventilation mitigation, and plant noise.
5. Industrial area impact: evidence of the surrounding uses and their operating characteristics.
6. Conservation area: a heritage note addressing the ground floor frontage and the character of the area.
7. Natural light: room by room modelling for every habitable room.
8. Space standard: a schedule of areas against the standard.

Put that schedule in the Planning Statement at application stage. Most Class MA refusals happen because one matter was left unaddressed, and the officer had no choice.

Where a full application is the better route

Three situations where prior approval is the wrong tool.

The scheme needs external works. Class MA does not permit them, and a hybrid of prior approval plus a separate application for alterations is harder to coordinate than one full application.

Natural light cannot be delivered to every habitable room in the layout the building allows. A full application involves a planning judgement rather than a mandatory refusal, so a scheme with one marginal room can at least be argued.

An Article 4 direction applies, or the building is listed. There is no right to rely on.

Against that, a full application brings affordable housing policy, space and amenity standards and design policy into play, so the commercial comparison is real. Work it out before the first submission rather than after a refusal, which is the judgement discussed in our note on deciding whether a refusal reason is worth appealing.

This is general guidance, not legal advice, and the terms of Class MA have been amended, so check the current Order and take advice from a qualified planning professional before relying on it. PlanScope drafts the supporting documents a prior approval submission needs, structured to UK planning policy, with the site facts flagged for you to supply. Browse all 66 PlanScope report types.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.