Offices to residential: evidencing the Class E use period
Class MA prior approval turns first on documents: two continuous years of Class E use and three months of vacancy. Rating records, utilities and leases each prove something different.
Class MA lets a building in Class E commercial use become dwellings through prior approval rather than a full planning application, and the first hurdle is documentary. You have to show the building was in a use falling within Class E for a continuous period of at least two years before the application, and that it has been vacant for at least three months immediately before it. Class MA two year use evidence is where these applications are refused, long before anyone looks at the layout.
The use history the class requires
Two separate periods have to be evidenced, and they sit in sequence rather than overlapping.
The qualifying use period is two continuous years in a use falling within Class E. That includes uses which sat in the old A1, A2, A3, B1 and parts of D1 and D2 before the Use Classes Order was rewritten in September 2020, because those uses moved into Class E by operation of law. A shop that never changed its trade still has a Class E use history.
The vacancy period is three continuous months immediately before the date of the prior approval application. Vacancy means the building is not in use, which is a question of fact rather than of tenancy. A building with a tenant paying rent but trading from elsewhere may still be vacant.
Class MA has been amended more than once since it came into force in 2021, including changes in 2024 that removed the floorspace limit which previously applied. Read the current consolidated text of Part 3 of Schedule 2 to the General Permitted Development Order 2015 rather than any summary, because the qualifying conditions have moved and older guidance is still circulating.
Documents that prove continuous commercial use
Officers want a paper trail that covers every month of the qualifying period, not a general assertion that the building was an office.
- Business rates records for the hereditament, showing the rateable occupier and the description of the property in each year.
- Leases, licences and rent demands, with the demise and the permitted use clause.
- Audited accounts or management accounts showing trading from the address.
- Utility accounts and consumption data, which distinguish an occupied building from an empty one better than almost anything else.
- Employer's liability insurance certificates, which must be displayed at the place of work and carry dates.
- Staff records, payroll addresses and dated internal photographs.
Build the file as a timeline with a document against each period. Then write a short covering schedule that tells the officer which document proves which month. A bundle without a schedule gets read as a bundle without evidence.
Rating records, leases and accounts
Business rates records are the backbone, because they are held by a public body and dated. The description held by the Valuation Office for the property also tends to record the actual use, which helps where the planning history is ambiguous.
But they are not conclusive on their own. Rates liability can continue after occupation ends, and empty property relief in the record is a fact you have to explain rather than hide. Pair the rating record with utilities and with an occupier's own documents.
Leases prove the legal right to occupy, which is not the same as occupation. A lease running through a two-year period during which the unit was shuttered proves nothing about use. Where the building had several occupiers, evidence each demise separately, because the question of what the planning unit actually is affects how the use history reads. The reasoning behind that is set out under how councils decide what they assess.
Gaps in occupation and how they are treated
A gap inside the two-year qualifying period is the commonest problem. The period has to be continuous, so a six-month void between tenants defeats it unless an earlier two-year block can be evidenced instead.
That is the point worth understanding: the qualifying two years does not have to run up to the application date. The three-month vacancy sits between the two, and there is no requirement that the two-year use immediately precedes the application. So a building vacant for eight months can still qualify if a continuous two-year Class E use can be evidenced before that vacancy began.
Where the record is patchy, look for a different two-year window rather than trying to argue a gap away. Councils are entitled to read the evidence strictly, and an application built on a contested month is an application at risk.
Prior approval matters beyond use history
Clearing the use test gets you to the prior approval matters, and those are where the scheme is shaped. Depending on the current text of the class, the authority considers transport and highways impacts, contamination risk, flooding risk, noise from nearby commercial premises affecting the intended occupiers, the provision of adequate natural light in all habitable rooms, the impact of the loss of ground floor use in a conservation area, and fire safety for taller buildings.
| Matter | Document that usually answers it |
|---|---|
| Natural light to habitable rooms | Daylight assessment with room-by-room results |
| Noise from adjoining commercial uses | Acoustic survey with mitigation by glazing and ventilation |
| Contamination | Phase 1 desk study, with Phase 2 where indicated |
| Flooding | Flood risk assessment where the site is in Zone 2 or 3 |
| Transport | Trip comparison and parking assessment |
Natural light is the one that kills schemes. Deep floorplates in office buildings produce bedrooms with no window, and a Daylight and Sunlight Assessment has to show every habitable room is served. Where the building sits above or beside a bar, a takeaway or a plant deck, a Noise Impact Assessment with a mitigation strategy is needed too. Similar issues arise in smaller schemes converting space above a shop.
The nationally described space standard applies to residential units created under these prior approval rights, so units below the standard cannot be approved.
What to do when records are missing
Older buildings and long-departed tenants leave holes. Three approaches usually help.
- Ask the local authority for its own records. Rating records, licensing files and enforcement history are often available on request and carry weight because they are the council's own.
- Obtain statutory declarations from former occupiers, neighbouring businesses, managing agents or contractors, naming dates and describing what they saw.
- Use dated third-party material such as trade directories, archived listings and dated photographs to bridge months where nothing else exists.
Where the evidence cannot be assembled, the fallback is a full planning application for change of use, judged on policy rather than on the permitted development conditions. That is slower and less certain, though it is not subject to the two-year and three-month tests at all.
Allow 56 days for the prior approval determination and build the evidence file before you start, since the clock runs whether or not the council has what it needs. PlanScope drafts the supporting documents for a prior approval submission from your answers and the constraints it detects at the postcode. Browse the report types to see which ones a conversion usually needs.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Does the two-year Class E use have to run up to the application date?
No. The three-month vacancy period sits immediately before the application, so the qualifying two years of Class E use necessarily ends earlier. A building vacant for eight months can still qualify if a continuous two-year period of Class E use can be evidenced before that vacancy began. What the period cannot contain is a break in the use itself.
Do old A1 or B1 uses count towards the Class E period?
Yes. Uses that sat in the former A1, A2, A3, B1 and parts of D1 and D2 moved into Class E when the Use Classes Order was rewritten with effect from September 2020. A shop or office that never changed its trade therefore has a qualifying Class E use history, and the rating description will usually confirm what was happening in the building.
What is the best evidence of continuous commercial use?
Business rates records held by the Valuation Office, paired with utility accounts and consumption data. Rates records are dated and held by a public body, and utilities distinguish an occupied building from an empty one. Add leases, accounts, employer's liability insurance certificates and dated photographs, then schedule every document against the month it proves.
What defeats a Class MA application after the use test is passed?
Most often natural light. Deep office floorplates produce habitable rooms with no window, and the prior approval matters include the provision of adequate natural light in all habitable rooms. Noise from adjoining commercial premises, contamination, flood risk and transport impacts follow. The nationally described space standard also applies, so undersized units cannot be approved.
What if the records simply do not exist?
Ask the council for its own rating, licensing and enforcement records, which carry weight because they are the authority's. Obtain statutory declarations from former occupiers, agents or neighbouring businesses naming dates. Bridge remaining months with dated third-party material. If the file still cannot be built, a full planning application for change of use avoids the two-year and three-month tests entirely.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.