The 8 Statutory Class MA Prior Approval Tests (Paragraph MA.2(2) GPDO)
When you submit an application for Prior Approval under Class MA, the Local Planning Authority cannot assess the application as if it were a full planning application. Instead, Paragraph MA.2(2) of the GPDO restricts the council strictly to assessing the following eight statutory matters (plus compliance with Nationally Described Space Standards and the Fire Risk Statement rule for tall buildings):
| Statutory GPDO Clause | Prior Approval Assessment Matter | Typical Technical Report Required | Primary Risk of Refusal |
|---|---|---|---|
| MA.2(2)(a) | Transport and highways impacts of the development | Transport Note, Cycle Storage Plan & Refuse Collection Strategy | Lack of safe bin storage, cycle racks, or severe on-street parking stress |
| MA.2(2)(b) | Contamination risks in relation to the building | Phase 1 Desktop Geo-Environmental / Contamination Screening | Former dry cleaners, petrol workshops, or printworks with solvent history |
| MA.2(2)(c) | Flooding risks in relation to the building | Site-Specific Flood Risk Assessment (FRA) if in Flood Zone 2 or 3 | Ground-floor or basement sleeping accommodation in Flood Zone 3 |
| MA.2(2)(d) | Impacts of noise from commercial premises on intended occupiers | BS 8233 / BS 4142 Acoustic & Noise Impact Assessment | Adjoining restaurants, pubs, air-conditioning plant, or commercial delivery yards |
| MA.2(2)(e) | In a Conservation Area (ground floor only): impact on character & sustainability | Heritage & Town Centre Retail Vitality Statement | Creating a 'dead residential frontage' on a historic shopping parade |
| MA.2(2)(f) | Provision of adequate natural light in all habitable rooms | BRE 209 / BS EN 17037 Internal Daylight & Sunlight Report | Deep-plan rear bedrooms or living areas with low daylight factors |
| MA.2(2)(g) | Impact on intended occupiers of introducing residential use in an industrial/waste/port area | Industrial Neighbour Compatibility & Agent of Change Assessment | Siting flats next to B2 general industry, scrapyards, or 24-hour distribution hubs |
| MA.2(2)(h) & (i) | Where converting a Class E(e) health centre or E(f) nursery: impact on local provision | Local Healthcare / Childcare Needs & Capacity Audit | Closing an active GP surgery or nursery in an area with waiting lists |
Fire Safety Prior Approval Rule for Buildings Over 18 Metres (7+ Storeys)
Introduced following the Building Safety Act reforms, Paragraph MA.2(4) of the GPDO imposes an additional mandatory test where the building exceeds 18 metres in height or contains 7 or more storeys: the applicant must submit a formal Fire Safety Statement detailing the fire safety design principles, concepts, and standards that have been applied to the development, and the LPA must consult the Health and Safety Executive (Building Safety Regulator).
Paragraph 193 of the National Planning Policy Framework (NPPF) establishes the 'Agent of Change' principle: existing commercial businesses and industrial venues should not have unreasonable restrictions placed on them because new flats are converted next door. Therefore, the burden is 100% on the Class MA applicant to prove that acoustic insulation and mechanical ventilation (MVHR) will protect flat residents from commercial noise.
Ground-Floor Conversions in Conservation Areas (Clause MA.2(2)(e))
While upper-floor offices above shops in a Conservation Area can be converted under Class MA without triggering heritage frontage tests, converting any part of the ground floor in a Conservation Area triggers Clause MA.2(2)(e).
Under this test, the council will assess two limbs: (1) the impact of that change of use on the character or appearance of the Conservation Area, and (2) the sustainability of the Conservation Area where the change of use involves the loss of services provided by the Class E building. If the property sits on a primary shopping frontage, councils frequently refuse ground-floor residential conversion unless you retain a small commercial Class E unit at the front of the ground floor and convert only the rear and upper storeys into C3 flats.
Mandatory Class MA Validation Document Checklist
Under Paragraph W of Part 3 of the GPDO, your application will be invalidated or refused unless it includes these core items: