Article 4 directions in London and office to residential

Before you price an office to residential conversion anywhere in London, check whether the borough has made an Article 4 direction over the site. If it has, the Class MA prior approval route is gone and you are looking at a full planning application, a design team, and a London Plan evidence base that costs several times what the prior approval would have. The direction is not always obvious from the borough's own pages, and the national dataset is the quicker check.

Article 4 directions withdraw permitted development rights in a defined area. They do not make development unacceptable. They remove the shortcut and put the decision back in front of the planning authority on its merits.

Why boroughs made them

Class MA of Part 3 of Schedule 2 to the General Permitted Development Order 2015 allows commercial, business and service floorspace in Class E to become dwellinghouses in Class C3, subject to prior approval. When the Class E use class was created in 2020 and Class MA followed in 2021, boroughs with concentrated office markets saw a route by which employment floorspace could leave the market without any assessment of the economic consequences.

The London Plan 2021 protects office capacity in the Central Activities Zone and in designated employment locations, and directions have followed that policy geography. Some cover the whole of a borough's CAZ frontages, others a handful of designated estates or town centre cores. A few extend to other rights, including the demolition and rebuild route and changes from light industrial to residential.

What the directions have in common is that they were justified on harm to the local economy, to cluster functions, or to the supply of affordable workspace. That framing matters when you come to make a full application, because it tells you what the officer will want the application to answer.

What the direction takes away, and what it leaves

A direction under article 4 of the 2015 Order removes a specified right within a specified area. Read the direction itself, not a summary. Three things vary between them:

1. The rights withdrawn. A direction aimed at Class MA does not automatically remove Class G, Class J or any other right.
2. The geography. Some are drawn tightly around frontages at ground floor level only, so an upper floor conversion may be untouched.
3. The date of effect. A direction made with twelve months' notice avoids the compensation liability that sections 107 and 108 of the Town and Country Planning Act 1990 would otherwise create, so most are made on that basis and take effect a year later.

If the right still exists, the Class MA conditions apply as normal. The building must have been in Class E use for a continuous period of at least two years before the date of the application. Amendments in 2024 removed the earlier vacancy requirement and the 1,500 m2 floorspace cap, so check the current text of the Order rather than an older summary. Prior approval is required on transport, contamination, flooding, noise from commercial premises, natural light in all habitable rooms and, in some circumstances, the loss of services, with a 56 day determination period.

Checking whether a site is covered

Do this before anything else and in this order.

The national Article 4 direction datasets on planning.data.gov.uk hold boundaries supplied by authorities, which is the fastest way to see whether a site sits inside one. Then go to the borough's own policies map and the direction document, because the dataset records the area but the direction records the detail. Finally, ask the borough in writing. A one line email answer confirming which direction applies and which rights it removes is worth having on file when the funder's solicitor asks.

Be careful with the boundary. Directions drawn around a town centre boundary or a designated estate can cut through a single building. Where a site straddles the line, the position depends on which part of the planning unit is being converted.

The Central Activities Zone position

Inside the CAZ the starting point is that office floorspace is protected, and a conversion to housing runs against adopted policy rather than merely lacking a permitted development route. That changes the shape of the case entirely.

An application will normally have to show marketing evidence over a sustained period at a realistic rent, an assessment of the building's suitability for continued or refurbished commercial use, and the contribution the residential scheme makes to housing delivery. Boroughs also look at whether affordable workspace could be reprovided at ground and lower floors, and at whether the residential environment created is acceptable in a location with late night servicing and plant noise.

None of that is impossible. It is a different project, with a different budget and a twelve to eighteen month programme rather than eight weeks.

What a full application has to carry

Once the right is removed, you are in the ordinary development management system and the London Plan applies in full. The documents that matter most on a conversion are the ones that test whether the homes are any good.

A Daylight and Sunlight Assessment is close to unavoidable on a deep plan office floorplate, because the light that satisfied a desk layout will not satisfy a bedroom. Expect questions about single aspect north facing units and about the rooms that rely on light wells. An Energy Statement is needed to work through the London Plan energy hierarchy and the carbon offset position for a major scheme.

For a building at or above 18 m, or seven storeys, a Fire Statement is required at Planning Gateway One under Article 9A of the Development Management Procedure Order 2015, prepared by someone with the fire engineering competence to sign it. That is a legal requirement for a competent author, and an AI-assisted draft is a starting point for that professional rather than a substitute for them. Where the scheme creates ten or more child bed spaces a Play Space Assessment will be expected against the London Plan child play space standard.

The Planning Statement then has to do the heavy work: why the loss of employment floorspace is acceptable here, on this evidence, against the borough's own policy wording.

Challenging a direction, or working around it

A direction can be challenged by judicial review, and the grounds tend to be procedural rather than about planning merits. The Secretary of State also has power to modify or cancel a direction. Both routes are slow and neither is a development strategy.

The workable options are narrower. Check whether an alternative right survives, such as a change within Class E or an upper floor route the direction did not reach. Consider a mixed scheme that retains commercial floorspace at the levels the borough cares about. Or make the full application and build the marketing evidence properly from the start, because a thin marketing exercise is the most common reason these applications fail.

Keep an eye on the direction's own review date where it has one, and on the national position through the planning law timeline, since the rules around commercial to residential change have moved more than once since 2021.

PlanScope drafts the supporting statements for a conversion application from the site details and the constraints it detects, with markers where site specific facts are missing rather than invented figures. Reports should be reviewed before submission, and for specialist technical reports, qualified professional input may be required.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. A Lawful Development Certificate is the only formal way to confirm that a proposed change of use would be lawful under the Order.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.