Converting Commercial Property to Residential in 2026: The Class MA Route

Empty shops, tired offices and underused first-floor space above the high street are, for the right buyer, some of the best value in UK property. The route that makes it work is Class MA — the permitted development right that allows a change of use from commercial (Use Class E) to residential (Use Class C3) without a full planning application.

Since the rules were widened in March 2024, Class MA has become considerably more useful. Here is what it allows in 2026, what it does not, and how to appraise a conversion properly.

What Class MA actually permits

Class MA allows a building in Use Class E to change to residential use subject to prior approval from the local planning authority. Use Class E is the broad commercial, business and service class introduced in 2020: shops, offices, restaurants and cafes, professional services, gyms, nurseries, clinics and light industrial all sit within it.

Prior approval is not a full planning determination. The authority can only consider a defined, limited list of matters — it cannot refuse simply because it would prefer the building stayed commercial. Applications are normally determined within 56 days.

What changed in 2024 — and why it matters

Two restrictions that used to kill most schemes were removed on 5 March 2024 in England:

• The 1,500 sq m floorspace cap was abolished. There is now no upper limit on the floorspace that can be converted, which brings whole office blocks and large retail units into scope.
• The three-month vacancy requirement was abolished. A building that is occupied and trading can now be the subject of an application, so an investor no longer has to empty a building and lose income first.

What remains is the requirement that the building has been in Class E use — or a use that now falls within Class E — for a continuous period of at least two years before the application date, and that the use was lawful.

What the council can and cannot assess

Prior approval considers a defined set of matters, which in practice include transport and highways impacts, contamination risk, flood risk, noise from nearby commercial premises, the provision of adequate natural light to all habitable rooms, the impact on a conservation area where the building's ground floor is in commercial use, and the effect of losing certain health or nursery uses.

The natural light test catches more schemes than any other. Deep retail units and landlocked upper floors with few windows frequently fail it. Get a daylight assessment done at appraisal stage, before you commit.

Where Class MA does not apply

• Article 4 directions. Many local authorities have removed Class MA rights across town centres and office cores. This is the first thing to check — an Article 4 area means a full planning application, with all the policy tests that brings.
• Listed buildings and their curtilage, scheduled monuments, and land in certain designated areas.
• Buildings not in Class E, such as pubs, hot food takeaways, cinemas and most industrial (B2/B8) premises, which sit in sui generis or other classes.
• Agricultural tenancies and a small number of other excluded situations.

Permitted development is not a free pass on standards

Converted units must meet the nationally described space standards — a minimum of 37 sq m for a one-person studio, with stated minima for every dwelling size — and every habitable room must have adequate natural light. Building Regulations apply in full: fire safety and compartmentation, means of escape, sound insulation between dwellings, ventilation, thermal performance and accessibility. On larger buildings the fire strategy alone can be the difference between a viable and an unviable scheme.

Class MA also does not authorise external works. New windows, extensions, balconies, roof alterations or a new entrance generally need their own planning permission, either under a separate permitted development class or by full application.

Appraising a conversion

A realistic appraisal starts from gross development value — the aggregate resale or investment value of the finished flats — and works back. Deduct construction costs (plan for a wide range per square metre depending on the extent of structural, fire and services work), professional fees, finance costs, the Community Infrastructure Levy where the authority charges it, marketing and sales costs, and your required profit. What is left is what the building is worth to you.

Most conversions are funded with bridging or development finance rather than a term loan, drawn in stages against a monitoring surveyor's reports, and refinanced or repaid on sale. Lenders will want to see the prior approval in hand, a costed schedule of works, a credible contractor and a clearly evidenced exit. Interest rolls up during the works, so a slipped programme hits the profit line twice.

Is the high street worth it?

Retail vacancy has pushed secondary high-street capital values down a long way from their peak, while residential demand in the same locations is generally robust. That gap is the opportunity: buying a building at a commercial yield and exiting at residential values per square foot. It works where the residential end value genuinely supports the build cost — which is a location-by-location question, not a national one.

Considering a commercial building for conversion? Browse our commercial listings, or request a commercial valuation from Giles Real Estates.