Class MA Permitted Development Calculator
Audit commercial Class E to residential conversion eligibility, check Article 4 direction restrictions, verify 37m² NDSS space standards, and review 56-day prior approval requirements.
Statutory Prior Approval Qualification Matrix
No 1,500m² cap (Abolished Mar 2024)
Average: ~60.0m² per flat
56 Calendar Days
Ready for 56-Day Prior Approval Application
Your proposal qualifies under Schedule 2, Part 3, Class MA of the GPDO 2015. The council must determine your application within 56 calendar days, assessed strictly against the 9 statutory prior approval matters.
56-Day Prior Approval
Deemed consent if LPA delays£0 Exemption
No Section 106 affordable unitsDeveloper Advantage: Dwellings delivered via Class MA are statutory exempt from local authority Section 106 Affordable Housing contributions, significantly enhancing scheme viability compared to full planning applications.
The 4 Major Rules of Class MA Commercial-to-Residential Conversions
In March 2024, the Government revoked the 3-month vacancy requirement and the 1,500m² floorspace cap. Commercial Class E premises of any scale can now be converted without artificial vacancy delays.
The local planning authority has exactly 56 calendar days to notify the applicant of its decision. If the council fails to determine the application within 56 days, prior approval is deemed granted automatically by law.
Every residential unit must strictly satisfy the Nationally Described Space Standard (minimum 37m² for 1-bed 1-person). Micro-apartments or studio flats below this threshold will be refused automatically.
Class MA only covers the change of use. If your scheme involves altering external elevations—such as punching new window openings, altering shopfronts, or adding external cladding—a separate planning permission is required.
Frequently Asked Questions: Class MA Permitted Development
Statutory advice on commercial to residential conversions, Article 4 directions, and prior approval.
Class MA (Commercial, Business and Service to Residential) is a statutory permitted development right introduced under Schedule 2, Part 3 of the Town and Country Planning (General Permitted Development) (England) Order 2015. It allows premises in Commercial Use Class E (shops, offices, restaurants, gyms, financial services, and health clinics) to be converted into residential dwellings (Class C3) via a 56-day prior approval application rather than a full planning application.
Statutory Diligence Guides & Legal FAQs
Official regulatory answers referencing Acts of Parliament, RICS guidance, and statutory planning orders.
Class MA Permitted Development: 2024 & 2026 Floorspace Limit Abolition Rules
On 5 March 2024, the UK Government officially abolished the restrictive 1,500 square metre floorspace limit under Statutory Instrument 2024/241 (The Town and Country Planning General Permitted Development England Amendment Order 2024). Under current Class MA regulations, commercial Class E buildings of ANY size (including multi-storey office blocks, department stores, and large business parks) can be converted into residential C3 dwellings via prior approval, without requiring a full planning application, provided all statutory prior approval conditions (adequate natural light, NDSS space standards, contamination, flood risk, and transport) are satisfied.
Is the Class MA 3-Month Vacancy Rule Still Required in England?
No. The statutory requirement for a building to have been vacant for at least 3 continuous months prior to submitting a Class MA prior approval application was permanently scrapped on 5 March 2024. Commercial property owners and landlords no longer need to evict paying tenants or leave premises deliberately empty to qualify for permitted development. However, the requirement that the property must have been in lawful Commercial, Business and Service (Class E) use for at least 2 continuous years immediately prior to the application date remains in full force.
Class MA Prior Approval: The Statutory 56-Day Deemed Approval Rule Explained
Under Paragraph W(11) of Schedule 2, Part 3 of the General Permitted Development Order 2015, the local planning authority has a strict statutory deadline of 56 calendar days (beginning on the day after the valid application was received) to determine a Class MA prior approval application. If the council fails to notify the applicant of its decision (grant, refuse, or formal written agreement to an extension of time) within that 56-day window, prior approval is legally deemed to be granted by operation of law, allowing the developer to proceed with the conversion.
Does Class MA Permitted Development Apply in Scotland? (Scottish Differences)
No. Class MA permitted development does NOT apply in Scotland. Class MA is an English statutory instrument enacted under the Town and Country Planning (General Permitted Development) (England) Order 2015. Scotland operates under a separate devolved planning regime governed by the Town and Country Planning (General Permitted Development) (Scotland) Order 1992 and National Planning Framework 4 (NPF4). In Scotland, converting commercial premises (such as offices, retail shops, or cafes) into residential flats always requires a Full Planning Application for change of use, subject to local Scottish planning authority policies.
Class MA & Nationally Described Space Standards: The 37 m² Minimum Rule
Under Article 3(9A) of the General Permitted Development Order, all residential dwellings created via Class MA permitted development MUST strictly comply with the Nationally Described Space Standards (NDSS). The absolute minimum legal Gross Internal Area (GIA) for any self-contained flat is 37 square metres for a 1-person, 1-storey studio flat with a shower room (or 39 square metres with a bathroom). Councils have a mandatory statutory duty to refuse prior approval if any single proposed flat falls even 0.5 m² below NDSS requirements. Micro-flats under 37 m² are illegal under Class MA.
Free Class MA Permitted Development Calculator Online UK
Our free online Class MA Permitted Development Calculator models commercial-to-residential conversion feasibility across England. Enter your commercial building's gross internal floor area, select proposed flat configurations (studios, 1-bed, 2-bed, 3-bed), and instantly verify statutory NDSS compliance. The calculator checks Article 4 Direction risks, calculates statutory council planning fees (£120 per home), computes Community Infrastructure Levy (CIL) exemptions, and outputs an official 1-page A4 certified planning diligence brief.
Class MA in Conservation Areas: Ground Floor Commercial & Article 4 Rules
Class MA permitted development IS allowed in Conservation Areas, but it is subject to a specific statutory restriction: where the conversion involves the ground floor of a commercial building, the local planning authority will assess whether the loss of the ground floor commercial use would have an adverse impact on the sustainability of that key shopping area. Furthermore, many urban councils have enacted formal Article 4 Directions removing Class MA rights in designated town centres, commercial cores, and high streets. Listed buildings are completely excluded from Class MA.
Class MA Prior Approval Council Planning Fees: Statutory Calculation Guide
In England, statutory local planning authority fees for Class MA prior approval applications are fixed at £120 per proposed new dwelling created, subject to a statutory maximum cap of £40,000. For example, converting an office building into 10 self-contained flats incurs a council planning fee of £1,200 (10 × £120) plus the standard Planning Portal administrative submission surcharge (£70.83 + VAT). This represents a massive cost saving compared to full planning permission, which costs £578 to £624 per dwelling.