Permitted development rights on a flat over a shop

If you own a flat above a shop, assume you have no householder permitted development rights at all. That is the practical starting point, and it surprises owners who have read about 4 metre extensions and 3 metre outbuildings. Permitted development for a flat above a shop is governed by the fact that Schedule 2 Part 1 of the Town and Country Planning (General Permitted Development) (England) Order 2015 applies only to a dwellinghouse, and the Order's own definition of that word excludes flats.

What remains is a shorter list: a few rights that attach to land or to buildings generally, some renewable energy classes, and the change of use and upward extension classes that require prior approval. Everything else is a planning application.

Why Part 1 applies to houses and not flats

Part 1 of Schedule 2 covers the familiar householder rights. Class A for extensions, Class B and Class C for roof alterations, Class D for porches, Class E for outbuildings, Class F for hard surfaces, Class G for flues and Class H for antennas. Every one of those classes is expressed as development within the curtilage of a dwellinghouse, and several also carry an express exclusion for flats.

The reason is straightforward once you see it from the drafting side. A house sits within its own curtilage and its owner controls the whole envelope. A flat shares a structure, a roof and often a garden with other occupiers, and rights exercisable by one flat owner would affect the others. The Order therefore removes the whole category rather than trying to write conditions for it.

So a rear extension to a first floor flat, a dormer in the shared roof, a rooflight above the flat's back bedroom and a new flue through the party wall all need planning permission, whatever the dimensions.

The definition of a dwellinghouse in the Order

Article 2 of the Order defines the terms, and two definitions do the work. A dwellinghouse does not include a building containing one or more flats, or a flat contained within such a building. A flat means a separate and self-contained set of premises constructed or adapted for use as a dwelling which forms part of a building from some other part of which it is divided horizontally.

Apply those to a shop with living accommodation above. The residential unit is divided horizontally from the shop, so it is a flat. The building contains a flat, so the building is not a dwellinghouse. Both limbs of the exclusion are satisfied and Part 1 is unavailable.

The same reasoning catches arrangements people assume are different. A maisonette over a commercial unit with its own street door is still divided horizontally from the shop. A single residential unit occupying the whole of the first and second floors above a takeaway is still a flat. Where the shop and the accommodation are in one planning unit with no separate residential use, the position can differ, but that is a question of fact about the existing use rather than a general rule, and it is worth resolving with the council before relying on it.

The rights that do still apply

Some parts of Schedule 2 attach to land or to buildings generally rather than to dwellinghouses, and those survive.

Part 14 is the one worth reading properly, because it has been amended more than once to widen the treatment of blocks of flats and to adjust the conditions on air source heat pumps and solar equipment. Check the current text rather than a summary, and note that the conditions on siting and noise still apply. The right to paint the exterior is narrower than it sounds too, as set out in the guide to painting the outside of a house and where the right stops.

Internal works are a separate point and often the answer. Works affecting only the interior of a building, or works that do not materially affect the external appearance, are not development at all under section 55 of the Town and Country Planning Act 1990, so no permission is needed. Reconfiguring the flat's internal layout usually falls here. Adding a window does not.

Works to a mixed use building

The building is in mixed use, which matters for the shop as well as the flat. Part 7 of Schedule 2 deals with extensions and alterations to non-domestic buildings and has its own classes, limits and exclusions, and it is not a substitute for Part 1. Where works affect the shared structure, such as the roof covering, a chimney or the rear elevation of the whole building, the application will need to describe the works to the building rather than to one unit.

That has a procedural consequence people miss. An application for works to a flat is not a householder application. Householder applications are defined by reference to dwellinghouses, so an application for a flat is a minor full application, on a different form, at a different fee, with a different appeal route and a six month appeal period rather than the twelve week householder window. Check the fee before you submit, because a householder fee paid on a flat application is a common cause of an invalid submission.

Common parts, the lease and the freeholder

Permitted development is a planning concept and nothing more. It does not give you the right to build.

A leaseholder of a flat above a shop almost always needs the freeholder's written consent for structural works, works to the roof, works to common parts and any alteration that affects the demise. The lease will say so, and breaching it is a forfeiture risk regardless of what the planning position is. Add to that the Party Wall etc. Act 1996 where works affect a party structure, restrictive covenants on the title, and the freeholder's own insurance conditions.

Ownership certificates matter as well. Where the applicant does not own the whole of the application site, the correct certificate must be completed and notice served on the other owners. Getting that wrong makes the application invalid and, if it slips through, makes any permission vulnerable.

Change of use classes that may help

The prior approval classes in Part 3 are where most of the practical opportunity sits for a mixed use parade.

Class MA permits a change of use from Class E, which covers shops, offices, cafes, clinics and indoor sport, to Class C3 residential, subject to prior approval on a defined list of matters including transport, contamination, noise from commercial premises and the provision of natural light. The class has been amended, including the removal of the floorspace cap and the vacancy requirement, so read the current text of the Order rather than an older summary. It does not apply to listed buildings, and Article 4 directions removing it are common in town centres and secondary shopping frontages.

Part 20 contains the upward extension classes. Classes AA and AB permit new flats to be built on top of certain detached and terraced buildings in commercial or mixed use, subject to prior approval covering design, amenity, daylight to existing flats and construction impacts, with conditions on the age of the existing building and a cap on overall height. For a shop with a flat over in a terrace, that is the class to look at first, and the upward extension mechanics parallel those described for houses in Class AA upward extension of a house.

Prior approval is not a formality. Refusals on daylight to the existing flats and on construction access are routine.

Applying where no right exists

Most work to a flat above a shop ends in a planning application, so make it a good one. A short Planning Statement that identifies the flat, describes the existing use, explains why Part 1 does not apply and addresses the relevant local plan policies on amenity, design and the character of the shopping frontage will do more than a set of drawings alone. Include existing and proposed elevations of the whole building rather than the flat alone, because the officer assesses the building.

The only way to confirm that something already built is lawful is a certificate of lawfulness under section 191 or, for proposed works, section 192 of the 1990 Act. If a previous owner added a dormer and nobody knows whether it was authorised, that certificate is the route, and the same principle applies to the arguments about curtilage and elevations discussed in curtilage and principal elevation in Class A cases.

Enter your postcode on PlanScope to see which documents an application for your flat is likely to need.

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