Shop to Flat Conversion: Can You Use Class MA Permitted Development? (2026)
Most high street shops can be converted to flats without full planning permission. Class MA prior approval is faster, cheaper, and more predictable than a planning application. Here is how it works, what it costs, and where it gets complicated.
TL;DR - The Quick Answer
Yes, most shops can be converted to flats using Class MA permitted development (Part 3, Schedule 2 of the GPDO 2015 as amended). Shops fall under Use Class E(a), which is eligible for Class MA conversion to residential (C3). Since the 2024 amendments, there is no floorspace cap and no vacancy requirement. Prior approval costs £260 per dwelling and the council must decide within 56 days. The council assesses transport, contamination, flooding, natural light, fire safety, noise, and impact on the sustainability of local shops. Conversions in conservation areas face additional scrutiny on shopfront character but are not excluded. Listed buildings and buildings in SSSIs are excluded. CIL (Community Infrastructure Levy) applies but Section 106 does not. For a typical single shop-to-flat conversion, expect total project costs of £40,000-£80,000 including works, with the prior approval process taking 8-12 weeks from submission to decision.
What Is Class MA and How Does It Apply to Shops?
Class MA is a permitted development right that allows buildings in commercial, business, and service use (Use Class E) to change to residential use (Use Class C3) without a full planning application. It was introduced in August 2021 as part of the government's push to repurpose empty high street properties and boost housing supply.
Shops are classified as Use Class E(a) under the Use Classes Order. This covers the sale of goods other than hot food, including retail shops, post offices, travel agents, hairdressers, funeral directors, and similar premises. Because E(a) sits within the broader Class E umbrella, shops are fully eligible for Class MA conversion. Learn more about Class MA in the GPDO on legislation.gov.uk.
The key advantage over a full planning application is predictability. With Class MA, the council can only assess a limited set of matters. They cannot refuse on design grounds, housing mix, affordable housing contributions, or policy objections to losing retail. If your scheme passes the prior approval criteria, it must be approved.
The 2024 Changes: What's Different Now
Class MA was significantly expanded by the Town and Country Planning (General Permitted Development etc.) (England) (Amendment) Order 2024. The two biggest changes that affect shop conversions:
Before (2021-2024)
- 1,500 sqm floorspace cap
- 3-month continuous vacancy required
- Building must have been Class E for 2 years
Now (2024 onwards)
- No floorspace cap
- No vacancy requirement
- Building must have been Class E for 2 years (unchanged)
What this means in practice: You can now convert an occupied, trading shop of any size to residential without planning permission. The shop does not need to be empty or failing. This opens up significantly more properties to conversion.
Important: The building must have been in Class E use (or a predecessor use class like A1 retail) for at least 2 continuous years before the date of application. Check the planning history to confirm the lawful use. If the building was last used as a pub (sui generis) or takeaway (sui generis), it does not qualify.
Conservation Area Restrictions for Shops
Class MA is not excluded in conservation areas, but there is additional scrutiny. The council can assess the impact of the loss of a ground-floor commercial premises on the character and sustainability of the conservation area.
In practice, this means two things for shop conversions in conservation areas:
- Shopfront character: The council will consider whether losing the commercial frontage harms the character of the conservation area. A high street with a continuous retail frontage may be seen as a defining characteristic worth protecting.
- Sustainability of local services: The council assesses whether the loss of the shop would harm the sustainability of shopping in the area. If your shop is one of the last remaining retail units on a parade, this is harder to argue.
This does not mean conservation area shops cannot be converted. It means you need a stronger case. Evidence of vacancy, falling footfall, or nearby alternative retail provision strengthens your application. An area with 40% vacancy on a parade is much easier to argue than a thriving row of independent shops.
Note on external changes: Class MA permits the change of use but does not grant permission for external alterations. Removing a shopfront, bricking up a window, or changing the facade requires separate planning permission. In a conservation area, these external works will need careful design to satisfy the heritage officer.
Prior Approval: What the Council Checks
Unlike a full planning application, the council can only assess a fixed list of matters when determining a Class MA prior approval. They cannot refuse on grounds outside this list. The matters are:
The 8 Prior Approval Matters
- 1Transport and highways: Adequate access, parking, and impact on the local road network
- 2Contamination risks: Whether the land is contaminated and needs remediation before residential use
- 3Flooding: Whether the site is in a flood risk area and adequate mitigation is proposed
- 4Natural light: Whether the proposed dwelling(s) will have adequate natural light in all habitable rooms. This is the most common reason for refusal.
- 5Fire safety: Whether the building meets fire safety standards for residential occupation (particularly relevant for buildings above 18m or with a single staircase)
- 6Noise from commercial premises: Impact of noise from neighbouring commercial uses on future residents
- 7Impact on a conservation area or local shops: Whether the loss of the commercial premises would have an adverse impact on the sustainability of shopping in the area or the character of the conservation area
- 8Adequate provision of natural light: Each habitable room must receive adequate daylight. Floor plans must demonstrate window positions relative to each room.
Natural light is the most common sticking point. Many ground-floor shops have limited rear windows, especially mid-terrace units. If you cannot demonstrate adequate daylight to all habitable rooms via existing or proposed windows (without external alterations, which Class MA does not cover), the application will be refused. Internal layouts need careful design to place bedrooms and living rooms against window walls.
Costs: Prior Approval vs Full Planning
Class MA prior approval is significantly cheaper and faster than a full planning application. Here is how the costs compare:
| Cost item | Class MA prior approval | Full planning application |
|---|---|---|
| Application fee | £260 per dwelling | £578 per dwelling |
| Decision timeline | 56 days (8 weeks) | 8-13 weeks (often longer) |
| Affordable housing | Not required | May be required (10+ units) |
| Section 106 | Does not apply | May apply |
| CIL | Applies (check local rate) | Applies (check local rate) |
| Design scrutiny | None (internal only) | Full design review |
| Architect drawings | Floor plans + sections | Full set including elevations |
| Supporting reports | 1-3 reports (noise, contamination, flood) | 5-10+ reports typical |
Source: Planning portal fee schedule 2026 • Data as of 2026
For a single shop-to-flat conversion, the typical prior approval costs (including professional fees) break down as:
Typical Prior Approval Costs (Single Flat)
- Prior approval fee: £260
- Architect / planning consultant: £1,500-3,500 (drawings + application management)
- Contamination assessment: £500-1,500 (Phase 1 desk study, required if council requests)
- Flood risk assessment: £300-800 (if in Flood Zone 2 or 3)
- Noise impact assessment: £400-1,200 (if neighbouring commercial uses)
Total prior approval process: £2,500-7,000 typical. Compare this to £8,000-20,000+ for a full change-of-use planning application with design and access statement, heritage statement, retail impact assessment, and housing needs assessment.
Practical Considerations
Getting prior approval is only the first step. The physical conversion of a shop to a flat raises several practical issues that affect cost and feasibility.
Shopfront and External Works
Class MA does not grant permission for external alterations. If you want to remove the shopfront and replace it with a residential facade, you need separate planning permission for the external works. In many cases, you can retain the shopfront glazing and install internal partitions and curtains, converting the space without altering the exterior. This avoids the need for a separate planning application but may not be ideal for privacy.
Nationally Described Space Standards (NDSS)
Class MA conversions must comply with the nationally described space standards (NDSS). Minimum floor areas apply:
| Dwelling type | Bedrooms | Min. floor area |
|---|---|---|
| 1-bed flat (1 person) | 1 | 37 sqm |
| 1-bed flat (2 persons) | 1 | 50 sqm |
| 2-bed flat (3 persons) | 2 | 61 sqm |
| 2-bed flat (4 persons) | 2 | 70 sqm |
Services and Utilities
- Drainage: Commercial drainage may not be suitable for residential use. A new soil stack and connection to the foul sewer is often needed (£2,000-5,000).
- Electrics: Full rewire to Part P residential standards. Commercial electrical installations are not suitable for domestic use (£3,000-6,000).
- Heating: Most shops have commercial heating systems. A new residential boiler and radiator or underfloor heating system is needed (£3,000-8,000).
- Sound insulation: If the flat shares walls or floors with other commercial units, enhanced sound insulation is required under Building Regulations Part E (£1,500-4,000).
Building Regulations
A separate Building Regulations application is always required for the physical conversion works. This covers structural safety, fire escape routes, thermal insulation, ventilation, and accessibility. The Building Regulations approval is entirely separate from the Class MA prior approval. Budget £1,000-2,500 in Building Control fees.
Mixed-Use Buildings: Shop Below, Flats Above
A common scenario is a building with a shop on the ground floor and existing flats above. Class MA can be used to convert just the ground-floor shop, creating an additional residential unit without affecting the existing flats above.
Key Points for Mixed-Use Conversions
- Class MA applies to the commercial part of the building only. Existing residential use above is unaffected.
- Sound insulation between the new ground-floor flat and existing upper-floor flats will need to meet Part E standards.
- Separate entrance for the new flat may be required. Fire escape routes must not depend on shared commercial access.
- If the whole building is commercial (shop below, offices above), Class MA can convert the entire building.
- Lease structures matter. If the shop is on a separate lease from the upper floors, you only need to deal with the shop leaseholder or freeholder.
When Class MA Will Not Work
Class MA is excluded in several situations. If any of these apply, you will need a full change-of-use planning application instead:
Class MA Exclusions
- Listed buildings: Any building that is listed (Grade I, II*, or II) or within the curtilage of a listed building is excluded.
- Sites of Special Scientific Interest (SSSI): Buildings within or adjoining an SSSI are excluded.
- Safety hazard areas: Land notified by the Health and Safety Executive as being in the vicinity of a major hazard.
- Military explosives areas: Land within a military explosives storage area.
- Scheduled monuments: Buildings that are scheduled monuments or within the curtilage of a scheduled monument.
- Article 4 directions: Where the council has made an Article 4 direction specifically removing Class MA rights. Some London boroughs have done this for key retail frontages.
- Less than 2 years in Class E: If the building has not been in continuous Class E (or predecessor) use for at least 2 years before application.
Important note on Article 4 directions: Some London boroughs (notably Westminster, Camden, and Hackney) have introduced or are considering Article 4 directions to remove Class MA rights for key retail areas. Always check with the local planning authority before investing in a property for conversion. An Article 4 direction does not prevent conversion, it just means you need full planning permission instead of prior approval.
Total Project Costs
Beyond prior approval fees, the physical conversion works make up the bulk of the cost. A typical ground-floor shop conversion to a 1-2 bedroom flat in London costs:
Conversion Build Costs (London, 2026)
Basic specification
£800-1,200/sqm
Standard kitchen, bathroom, basic finishes
Good specification
£1,200-1,800/sqm
Fitted kitchen, tiled bathroom, timber flooring
For a 50 sqm 1-bed flat conversion, expect total build costs of £40,000-90,000 depending on specification and structural complexity. Add £2,500-7,000 for the prior approval process. Total project budget: £45,000-100,000.
Key variables that increase costs: significant structural work (removing or adding internal walls), new drainage connections, shopfront replacement (separate planning), fire escape alterations, and enhanced sound insulation in mixed-use buildings.
Shops (Class E(a)) can be converted to flats (C3) under Class MA permitted development without full planning permission. Since 2024, there is no floorspace cap and no vacancy requirement. Prior approval costs £260 per dwelling. The council assesses transport, contamination, flooding, natural light, fire safety, noise, and impact on local shops. Conservation areas face additional scrutiny but are not excluded. Listed buildings are excluded. Typical total project cost for a single flat conversion in London: £45,000-100,000 including build works and professional fees.
Frequently Asked Questions
Can I convert a shop to a flat without planning permission?
Yes, in most cases. Class MA permitted development allows shops (Class E(a)) to be converted to residential (C3) through a prior approval process, which is not the same as full planning permission. Prior approval costs £260 per dwelling and the council must decide within 56 days. The council can only assess a limited set of matters: transport, contamination, flooding, natural light, fire safety, noise, and impact on local shops. Since 2024, there is no floorspace cap and no vacancy requirement. However, Class MA does not apply to listed buildings, SSSIs, or properties covered by an Article 4 direction removing these rights. Source: GPDO 2015, Schedule 2, Part 3, Class MA.
How much does it cost to convert a shop to a flat?
The prior approval application costs £260 per dwelling. Total professional fees for the prior approval process (architect, planning consultant, supporting reports) typically run £2,500-7,000 for a single flat conversion. Physical conversion build costs in London are £800-1,800 per sqm depending on specification. For a typical 50 sqm 1-bed flat, expect total project costs of £45,000-100,000 including all fees and build works. This compares to £8,000-20,000+ just for the planning process alone if you needed a full change-of-use application.
Can I convert a shop in a conservation area to a flat?
Yes, Class MA is not excluded in conservation areas. However, the council can assess whether the loss of the ground-floor commercial premises would have an adverse impact on the character or sustainability of the conservation area. You will need a stronger case in a conservation area — evidence of vacancy, falling footfall, or nearby alternative retail provision helps. External alterations to the shopfront require separate planning permission, which in a conservation area will be assessed by a heritage officer.
Does the shop need to be empty to convert it?
No. Since the 2024 amendments to the GPDO, there is no vacancy requirement for Class MA. You can convert an occupied, trading shop. However, the building must have been in continuous Class E use (or a predecessor use class like A1 retail) for at least 2 years before the date of application. Check the planning history to confirm the lawful use.
Is there a size limit on Class MA conversions?
No. The original 1,500 sqm floorspace cap was removed by the 2024 amendments. Class MA now applies to commercial buildings of any size. However, each dwelling created must meet the nationally described space standards (NDSS) — minimum 37 sqm for a 1-person 1-bed flat, 50 sqm for a 2-person 1-bed flat, and 61 sqm for a 3-person 2-bed flat.
Can I change the shopfront as part of Class MA?
No. Class MA only grants permission for the change of use, not for external alterations. If you want to remove the shopfront and replace it with a residential facade, you need a separate planning application for the external works. Many conversions retain the shopfront glazing and install internal partitions and curtains instead, avoiding the need for a separate application.
Do I need to pay CIL on a shop to flat conversion?
Yes, CIL (Community Infrastructure Levy) applies to Class MA conversions. The amount depends on your local authority's CIL charging schedule and the net additional floorspace created. However, if the building has been in lawful use for at least 6 of the past 36 months, you may qualify for the 'in-use buildings' exemption, which reduces or eliminates the CIL charge. Section 106 contributions do not apply to Class MA prior approvals.
What is the most common reason for Class MA refusal?
Inadequate natural light. The council must be satisfied that all habitable rooms (bedrooms, living rooms, kitchens) receive adequate daylight. Ground-floor shops, especially mid-terrace units, often have limited rear windows. Careful internal layout design is essential — place habitable rooms against window walls and use non-habitable spaces (hallways, bathrooms, storage) in the darker parts of the floorplate. If you cannot demonstrate adequate natural light, the council will refuse the application.
Summary
Shop to flat conversions under Class MA are one of the most accessible routes into residential development. The 2024 amendments removed the floorspace cap and vacancy requirement, opening up a much larger pool of eligible properties. Prior approval is cheaper, faster, and more predictable than full planning.
The key risks to manage are natural light (design the internal layout carefully), conservation area sensitivity (prepare evidence on retail sustainability), and external works (budget for a separate planning application if the shopfront needs replacing).
Before committing to a property, check the planning history to confirm at least 2 years of Class E use, check for Article 4 directions, assess the natural light situation, and budget for the full conversion cost including Building Regulations compliance.
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Frequently Asked Questions
Can you convert a shop to a flat in the UK?
Yes. Since August 2021, Class MA permitted development allows shops (Use Class E(a)) to be converted to residential flats (Use Class C3) through a prior approval process. This is simpler and cheaper than full planning permission. Prior approval costs £260 per dwelling and the council decides within 56 days. Since 2024, there is no floorspace cap and no vacancy requirement. The building must have been in Class E use for at least 2 continuous years. Listed buildings and SSSIs are excluded. Mayfair Studio handles shop to flat conversions from £1,295.
How much does a shop to flat conversion cost UK?
Prior approval application fee is £260 per dwelling. Total prior approval process costs (architect, planning consultant, supporting reports) run £2,500-7,000 for a single flat. Physical conversion build costs are £800-1,800 per sqm in London depending on specification — a typical 50 sqm 1-bed flat conversion costs £40,000-90,000 for the build works alone. Total project budget including all fees: £45,000-100,000. CIL (Community Infrastructure Levy) may also apply depending on the local authority. Mayfair Studio offers fixed-fee prior approval packages from £1,295.
Do you need planning permission to convert a shop to residential?
Not in most cases. Class MA permitted development allows shops to be converted to residential through a prior approval process, which is not the same as full planning permission. The council can only assess specific matters: transport, contamination, flooding, natural light, fire safety, noise, and impact on local shops. They cannot refuse on design, housing mix, or policy grounds. However, full planning permission is required if the building is listed, in an SSSI, or covered by an Article 4 direction removing Class MA rights.
What is the difference between prior approval and planning permission for shop conversions?
Prior approval (Class MA) costs £260 per dwelling, takes 56 days maximum, and the council can only assess a fixed list of matters (transport, contamination, flooding, natural light, fire safety, noise, local shopping impact). Full planning permission costs £578 per dwelling, takes 8-13 weeks or longer, and the council can assess everything including design, housing mix, affordable housing contributions, and policy compliance. Prior approval is faster, cheaper, and more predictable. Full planning is only needed when Class MA does not apply.
Can you convert a shop to a flat in a conservation area?
Yes. Class MA is not excluded in conservation areas. However, the council will assess whether losing the commercial premises harms the character or sustainability of the conservation area. External alterations (shopfront changes) require separate planning permission, which in a conservation area will be assessed by a heritage officer. Provide evidence of vacancy rates, alternative retail provision, and falling footfall to strengthen your case. Mayfair Studio specialises in conservation area conversions.
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