Planning out your home extension

One of the most common projects we undertake are home or property extensions. They range from a very minor single storey rear extension to a complete remodelling of an existing property, almost unrecognisable from its original form.

As with all projects, we start with your brief: what extra space do you want to create? We then look at how this can be integrated into the existing property and its function. Other important things to consider are the look of the extension – will it appear as part of the original house in terms of its architectural style, or completely different?

How much will an extension cost?

For a straightforward house extension, you should allow around £1,200 – £1,600 per m² and upwards of £2,000 per m² for a higher end specification. There are other factors to consider too – for example, are there any nearby trees which may impact on your foundation type and depth. If there are any public sewers running under or nearby your proposed extension, approval may be required from the statutory service authority. This can add to your build cost.

Will I need Planning Permission?

Not all extensions require planning permission. Please visit our planning page to find out more about whether an extension requires planning permission. Alternatively, do contact us for a free initial consultation at your home.

Building Regulation Approval

Regardless of whether your new extension requires planning permission, it will need Building Regulations approval. Please refer to our Building Regulations page for more information.

The Party Wall Act

Some extensions require you to notify neighbours of your intention to extend under the Party Wall Act. The Party Wall Act 1996 allows you to carry out work on, or up to, your neighbours’ land and buildings, formalising the arrange­ments while also protecting everyone’s inter­ests. This is not a matter covered by planning or building control.

Your neighbours cannot stop you from build­ing up to, or even on, the boundary between your properties – even if it requires access onto their land (providing you have planning permission to do so, and there are no restrictive covenants).

If your extension involves building or digging foundations within 3m of the boundary, party wall or party wall struc­ture, or digging foun­dations within 6m of a boundary, the work will require you to comply with the Party Wall Act. In these cases, you may need a surveyor to act on your behalf.

Where your neighbour is in agreement to the work and a survey does not need to be carried out then Blink Architecture can usually deal with a Party Wall Agreement on your behalf.


Extensions testimonials

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