What size extension can I build with planning permission?

Extensions of more than one storey must not extend beyond the rear wall of the original house by more than three metres. Anything more than three metres and you would require planning permission for the extension. The maximum eaves and ridge height of your extension must be no higher than the existing house.

What size extension can you build without permission?

Without planning or neighbour permission, extensions on a terraced or semi-detached residential property must be no taller than 4 metres in height, no longer than 3 metres and must be single storey.

What is the maximum size extension with planning permission?

Extensions cannot be higher than the highest part of the existing roof; or higher at the eaves than the existing eaves. Where the extension comes within two metres of the boundary* the height at the eaves cannot exceed three metres.

How far can you extend without planning permission UK 2021?

If your extension is one storey, it can extend up to six metres from the property – although if your house is detached, this is extended to 8 metres.

Can my Neighbour build an extension up to my boundary?

In general, your neighbour only has the right to build up to the boundary line (line of junction) between the two properties but there are circumstances when they can legitimately build on your land. You can give consent for them to build a new party wall and foundations on your land.

Do I need an architect for a small extension?

Will I need planning permission for extension work? For a full planning application you will need professional architecture drawings, so the answer would be Yes. … Your architect should be able to create your more detailed building regulations drawings, and instruct a structural engineer on your behalf.

Can I double the size of my house with an extension?

Extensions of more than one storey must not extend beyond the rear wall of the original house by more than three metres. … Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house. Two-storey extensions no closer than seven metres to rear boundary.

Can I build a side extension without planning permission?

A side return extension is considered to be permitted development (PD) — in other words, it doesn’t need planning permission as long as it satisfies certain criteria. … If the extension is within two metres of a boundary, maximum eaves height should be no higher than three metres to be permitted development.

What happens if you build without planning permission UK?

If you build without planning permission, you may not be breaking any rules. However, if there is a planning breach, you may have to submit a retrospective application or even appeal against an enforcement notice.

What can I do if my Neighbour builds without planning permission?

If you built property or developed a site without planning permission, the council may ask you to apply retrospectively. If the council considers the development an unacceptable breach of planning control, they may take enforcement action. Depending on the type of breach, the council may serve: an enforcement notice.

What is the maximum size shed without planning permission UK?

To avoid planning permission, sheds should be single storey with a maximum eaves height of 2.5m for flat roofs, 4m for dual pitched roofs or 3m in any other case.