Class E to homes: the conditions people miss

Most Class MA prior approval refusals are not about design, noise or daylight. They fail on a qualifying condition, and the one that catches people most often is the requirement that the building has been in Class E use for a continuous period of at least two years before the date of the application. No amount of good evidence on transport or contamination rescues an application where that condition is not met, because the local planning authority has no discretion over it.

Class MA sits in Part 3 of Schedule 2 to the GPDO 2015. It has been amended more than once since it came into force in 2021, including changes in 2024, so read the current text of MA.1 and MA.2 in the Order rather than relying on any summary, including this one.

The qualifying conditions, in the order they are tested

Work through them before spending anything. An officer will, and a refusal on a qualifying condition still costs the fee and the eight weeks.

1. Has the building been in a use falling within Class E for the required continuous period before the date of application?
2. Does the site fall within any of the excluded categories of land?
3. Is the building listed, within the curtilage of a listed building, a scheduled monument or within the curtilage of one?
4. Has an Article 4 direction removed the right in this area?
5. Does the proposal meet the requirements applying to new dwellings created under permitted development, including the nationally described space standard and adequate natural light in all habitable rooms?
6. Have the prior approval matters been addressed with evidence?

The first four are pass or fail. The last two are matters the authority assesses, and they are where a well prepared application wins.

Two years of Class E use before the application

The condition is about the use of the building, not about the planning permission attached to it. A unit with permission for a shop that has actually been used as a storage depot for three years has not been in Class E use, and a unit whose Class E use stopped eighteen months ago has not been in that use for the required continuous period up to the application date.

The evidence is commercial. Leases and licences with dates, business rates records, utility bills showing occupation, insurance documents, dated photographs, and a statutory declaration from the owner or occupier where the paper trail has gaps. Councils do ask for this and they do refuse where it is thin.

Two traps recur. A building that changed use within Class E during the two years is fine, because movement within the class is not development, but the evidence has to show the whole period was spent in one Class E use or another. And a building that was partly in Class E and partly in a use outside it needs the position established for the part being converted, which means floor plans as well as documents. Where the history is unclear, proving an existing lawful use before a change of use sets out how to build the record, and a certificate of lawful existing use under section 191 of the Town and Country Planning Act 1990 is the formal route.

Vacancy requirements and the floorspace cap that applied when Class MA was introduced were changed in 2024. Check the current wording rather than working from an older note, because this is exactly the point where a stale checklist produces a refusal.

Excluded land and excluded buildings

Class MA does not apply where the site is or forms part of certain designated categories, including a site of special scientific interest, a safety hazard area and a military explosives storage area. There are further exclusions in MA.1, so read the list in the current Order against the site rather than the headline ones.

The exclusion that surprises investors is the safety hazard area, which covers land near notified major hazard installations and pipelines. A former office on an industrial estate is exactly the kind of building that attracts a Class MA proposal and exactly the kind of location that can fall within such an area.

Agricultural tenancies also feature. Where the site is or forms part of land under an agricultural tenancy, the right is qualified, and a former farm office building can be caught.

Check the council's constraints layer and the national planning data service for the designations before you buy. The cost is an afternoon.

Listed buildings and scheduled monuments

A listed building cannot be converted under Class MA, and neither can a building within the curtilage of a listed building. The same applies to scheduled monuments and land within their curtilage.

Curtilage is the part that catches people. A 1970s office block in the yard behind a listed mill may be within the curtilage of the listed building, in which case the right is unavailable however unremarkable the office is. Curtilage is a question of fact, assessed on the historic functional relationship rather than on the present ownership.

Where the right is unavailable for this reason, a full planning application remains possible and is often the better route anyway, because it allows a scheme designed for the building rather than one squeezed into the shape of a permitted development right. A heritage statement will be needed, and listed building consent runs alongside for any works to the listed building itself.

Conservation areas are treated differently. The right is not removed outright, but where a building is in a conservation area the authority considers the impact of the loss of the ground floor use on the character or sustainability of the area, which is a real hurdle on a shopping street.

Article 4 directions removing the right

Many authorities have made Article 4 directions removing Class MA in defined areas, typically town centres, primary shopping frontages and designated employment areas, on the basis that the loss of commercial floorspace would harm the area's function.

Directions are local, mapped and dated, and they are published on the council's own website and on the national planning data service. Check both, and check the date, because a direction made after you inspected the site but before you applied will bite.

Where a direction applies, the route is a full planning application assessed against the local plan's policies on the loss of employment or retail floorspace. That is a harder case than prior approval, and it needs marketing evidence: how long the unit has been marketed, at what rent, through which agents, and what interest was received.

The prior approval matters and the evidence for each

Where the qualifying conditions are met, the authority considers a defined list of matters, and each needs evidence rather than assertion.

Transport and highways impacts, including the effect of the change on the highway network and parking. A Transport Statement scaled to the size of the scheme, with trip generation for the former and proposed uses and a parking assessment, answers this in a few pages.

Contamination risks, which on a former industrial or commercial site means a desk study and, where it identifies potential sources, intrusive investigation. Residential use is a more sensitive end use than commercial, so a site that was acceptable as an office may not be acceptable as flats. The Contaminated Land Assessment pages set out what Phase 1 and Phase 2 work covers, and this is work for a suitably qualified and experienced person under BS 10175.

Flooding risks, assessed against the flood map for planning and the council's own mapping, with the vulnerability change from commercial to residential made explicit.

Noise from commercial premises, which on an industrial estate or above a pub is the matter most likely to defeat an otherwise sound application. A Noise Impact Assessment measuring the actual environment and setting out the glazing and ventilation strategy is expected, and councils want a suitably qualified acoustician.

Adequate natural light in all habitable rooms, which is a hard requirement rather than a balancing exercise. Deep floorplates with a single aspect are where office conversions fail, and the fix is fewer, better units rather than more of them.

What to do when one condition fails

There are only three useful responses and one useless one.

The useless one is applying anyway and hoping. Officers check the qualifying conditions first and a refusal is recorded against the building.

The first useful response is to wait, where the failure is about elapsed time and the building can be kept in Class E use until the period is met. Keep the evidence as you go. The second is a full planning application, which is slower and attracts a larger fee but is assessed on planning merits and can deliver a better scheme, including changes to the building that Class MA would not permit. The third is to reconsider the end use: another Class E use, or a use the council actively wants, may be worth more than flats on a street where the authority has made an Article 4 direction precisely to stop them. Movement within the class needs no application at all, as covered in moving within Class E without a planning application.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required. This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it.