Change of Use: Class MA

Class MA of the General Permitted Development Order allows for the conversion of commercial, business, and service uses (Class E) to residential (C3) without full planning permission, subject to prior approval.

What is the space limit?

As of March 2024, the 1,500 sqm floorspace limit and the requirement for the building to have been vacant for three continuous months before the application have been entirely removed, massively expanding the scope of viable projects.

Constraint	Prior Rule	2024 Rule
Floorspace limit	Max 1,500 sqm	No limit
Vacancy	3 months required	No requirement
Class E usage	Required for 2 years	Required for 2 years

Worked Example

Assume a high street retail unit (Class E) of 2,000 sqm. Previously, this required full planning permission, triggering Section 106 affordable housing contributions. Now, it falls under Class MA. The developer only needs prior approval regarding specific impacts (e.g., transport, noise, light).

Common Mistakes

• Ignoring Article 4: Local authorities frequently issue Article 4 directions in commercial core zones, which explicitly remove Class MA rights.
• Failing natural light checks: Every habitable room must have adequate natural light; prior approval will fail if not.

FAQ

Do I need to adhere to national space standards?
Yes, all new dwellings created under Class MA must meet the Nationally Described Space Standards (NDSS).

Can I build an extension under Class MA?
No, Class MA only covers the change of use of the existing internal space. Any external alterations or extensions require separate planning permission.

Next Step: Review your local authority's Article 4 register.