Do I need planning permission to build a small extension?

The short answer is that you DON’T need planning permission for an extension if you build within your permitted development rights. Most of the restrictions that don’t fall under permitted development are for work to the front of a house, next to a road or near a boundary.

What size extension can I build without planning 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 planning permission do I need for a small extension?

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.

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 you 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.

What size extension can I build without planning permission 2021?

How big can you build an extension without planning? The permitted development rules have recently been relaxed, allowing you to build an extension without planning permission of up to six metres (or eight metres if your house is detached).

What is the 45 degree rule?

The 45-degree rule is a common guideline used by local planning authorities to determine the impact from a housing development proposal on sunlight and daylight to the neighbouring properties. If you’re thinking of a home extension or a change to your home, and need some advice, get in touch!

How much does a single story extension cost?

Single storey – A single storey extension in London will usually cost between £2,000 and £3,000 per sqm (£185 and £280 per square foot). £2,000 per sqm would represent cost-effective finishes and products.

What are the rules for extensions?

For all extensions

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 much does it cost to get an architect to design an extension?

Most architects will charge by a percentage of the total cost of the building works. This ranges between 5 – 12% on average. Architect fees for larger, more complex house extensions are usually charged at 10% of the final cost.

What happens if I build an extension without planning?

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.

Do you need planning permission after 10 years?

If you want to be certain that the existing use of a building is lawful for planning purposes, or that your proposed development does not require planning permission, you can apply for a Lawful Development Certificate. … a condition or limitation on planning permission has not been complied with for more than 10 years.

How much can you extend a house UK?

Single-storey rear extensions must not extend beyond the rear wall of the original house by more than eight metres if a detached house; or more than six metres for any other house. Maximum height of a single-storey rear extension of four metres.