Introduction
The challenge of delivering new homes in England has placed a spotlight on planning mechanisms that can unlock residential development from existing commercial buildings without the need for full planning applications. One of the most significant of these mechanisms is Class MA, a permitted development right that enables the change of use of commercial buildings to residential use subject to a prior approval process. The evolution of Class MA, especially with recent legislative amendments, has made it a powerful tool for property owners and developers looking to repurpose under‑utilised commercial stock across towns and cities.
What is Class MA Planning?
Class MA is a change‑of‑use permitted development right under the Town and Country Planning (General Permitted Development) (England) Order that allows buildings used for commercial purposes within Use Class E — covering offices, shops, restaurants and cafes, gyms, medical services, day nurseries and similar uses — to be converted into residential dwellings classified under Use Class C3. Unlike a full planning application, Class MA relies on a prior approval process, meaning that the local planning authority assesses only specific planning matters such as transport impacts, contamination risks, flooding, noise, and provision of adequate natural light rather than evaluating the scheme against the full suite of local plan policies.
Recent Updates to Class MA Legislation
Class MA was introduced in 2021 as part of reforms to permitted development rights, replacing earlier rights that applied to offices and other specific uses. Originally the right came with conditions including a cap on the size of buildings that could be converted and a requirement that premises be vacant for a period before conversion. However, substantial amendments to the General Permitted Development Order came into force on 5 March 2024, brought in by the Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2024. These amendments removed the 1,500 square metre floor space limit for buildings changing use under Class MA and also removed the three‑month vacancy requirement that previously applied. As a result, buildings of any size within Use Class E can now be considered for conversion to residential use under Class MA, whether they are occupied or not, provided they meet other criteria and conditions.
Eligibility Criteria for Class MA Conversions
To benefit from Class MA, the existing building must be in commercial, business or service use classified as Class E at the time of application. Historically, buildings needed to have been vacant for at least three continuous months and their floor space limited to 1,500 square metres, but these conditions were removed by the 2024 amendments. The building must still have been in lawful Class E use, or in an equivalent predecessor use, for a continuous period of at least two years prior to the date of application. A prior approval application must be submitted to the local planning authority, and this application must address specified planning matters including transport, contamination, flood risk and impacts of noise on future residents, as well as adequate natural light provision in habitable rooms.
Buildings and Sites Excluded from Class MA
As with other permitted development rights, Class MA does not apply everywhere. Development under Class MA is not permitted if the building lies on land that is part of, or within the curtilage of, a listed building or scheduled monument, or if the land is within a Site of Special Scientific Interest (SSSI). It is also inapplicable in areas of significant natural or historic importance, including Areas of Outstanding Natural Beauty (AONBs), National Parks, the Broads and World Heritage Sites. Article 4 directions can also remove Class MA rights in specific areas, meaning local authorities can require full planning applications in designated locations.
Why Class MA Matters
Class MA matters because it represents one of the most flexible current routes for delivering new homes from existing commercial stock without needing full planning permission. By enabling a broad spectrum of buildings in Use Class E to be converted into residential use without a floorspace cap and without a vacancy test after the 2024 changes, it opens up opportunities to repurpose larger commercial buildings such as extensive office blocks, retail frontages and leisure facilities. This is particularly relevant in urban centres where viable commercial uses may have declined but where residential demand remains strong. Class MA’s prior approval process focuses only on specific planning considerations, potentially accelerating delivery and reducing costs compared with traditional planning applications. The changes to Class MA reflect wider government policy aimed at boosting brownfield housing delivery and making more efficient use of existing building stock.
