Do you need planning permission for a shed? The short answer

Most small garden sheds don't need planning permission. Thanks to permitted development rights, you can usually put up a shed, garden room or other outbuilding without a formal application, provided it meets certain size, height and position rules. But those rules are specific, and if your shed crosses a boundary or you live in a protected area, you may need to apply. The key is to check before you build, not after.

The permitted development rules for sheds and garden rooms

In England and Wales, outbuildings like sheds are covered by permitted development as long as they are single-storey, not used as self-contained living accommodation, and sit within the curtilage of your house (the land around it). The main limits are:

• Height: a maximum eaves height of 2.5 metres and an overall height of 4 metres for a dual-pitched (A-frame) roof, or 3 metres for any other roof shape.
• Boundary rule: if the shed is within 2 metres of your property boundary, the whole structure must not exceed 2.5 metres in height.
• Position: it must not be forward of the principal elevation (the main front wall of your house) or forward of a wall forming that elevation. In other words, no sheds in the front garden that stick out towards the street.
• Coverage: the total area of ground covered by outbuildings, extensions and other buildings must not exceed 50% of the total curtilage (excluding the original house).

If your shed meets all of these, you can usually build it without planning permission. The same rules apply to garden rooms and workshops, as long as they aren't used as separate homes.

When your shed will need planning permission

There are several situations where permitted development doesn't apply, and you'll need to submit a planning application:

• Flats and maisonettes: permitted development rights for outbuildings generally don't apply to flats, so you'll need permission.
• Protected areas: in conservation areas, Areas of Outstanding Natural Beauty, National Parks, and World Heritage Sites, the rules are tighter. For example, outbuildings may not be allowed if they are on land forward of the principal elevation, or there may be limits on size and materials. In some cases, you'll need permission even for a small shed.
• Listed buildings: you'll need listed building consent for any outbuilding within the curtilage of a listed building, and planning permission may also be required.
• Article 4 directions: your local council can remove permitted development rights in certain areas, meaning you need permission for a shed that would normally be allowed.
• Business use: if you plan to run a business from your shed, or use it as a separate dwelling, you'll likely need planning permission.
• Flats or shared gardens: if you don't own the land or have shared ownership, check your deeds and lease.

Scotland and Northern Ireland have their own permitted development rules, so always check with your local authority if you're not in England or Wales.

Building regulations: a separate set of rules

Planning permission and building regulations are different things. Even if you don't need planning permission, you may still need to comply with building regulations. For most sheds, you won't need building regulations approval if the floor area is less than 30 square metres, there is no sleeping accommodation, and it is at least one metre from any boundary or is constructed of substantially non-combustible materials. If you're adding electricals, they must be installed safely, and in England and Wales, most electrical work in a shed is notifiable under Part P unless you use a registered electrician. If you want to sleep in your garden room, it becomes a habitable space, and building regulations will apply.

How to check your shed plans before you build

Before you buy or build, do a few simple checks. Measure your garden, note the position of boundaries and the principal elevation, and calculate the total footprint of existing outbuildings. Look at your property deeds for any restrictive covenants that might ban sheds. Then contact your local council's planning department for informal advice. Many councils offer a pre-application service, which is cheaper than a retrospective application. It's also worth talking to neighbours, especially if your shed will be close to their boundary. If in doubt, apply for a lawful development certificate. It confirms that your shed is permitted development and is useful if you ever sell your home.

A well-placed shed or garden room is a wonderful addition. With a little checking, you can enjoy it without planning headaches.