Single Storey Extension

Our Services for Single Storey Extensions

ExtensionSingle storey extension is simply an extension that can be built onto part of the home whereby one side (or more) of extension adjoins the property, and there is only ground floor built to it, single storey extension expands your living space. If you look for a larger space,  then a single storey extension could be the ideal solution for you

We have extensive knowledge and experience in dealing with single storey extensions in London boroughs, such as Ealing, Merton, Hackney, Kingston and Chelsea, Enfield, Lewisham and Bromley and many others.

Whether you want to extend your garage, have a bigger kitchen, add a dining room or snug, our experts can design your dream, advise on building regulations and apply for planning permission to your London borough council on your behalf. Plus, with our 3D graphic imaging services, you can be sure of what you are getting before you commit yourself to anything.

So, no matter what type of single or double storey extension you’re interested in adding to your London property, we can help. Take a look at our case studies below or get in touch with us for more information.

Frequently Asked Questions about Single Storey Extension

In 2019, an estimate for the cost of a single storey extension is anywhere between £1,350 and £1,950 per m2.

In London and the South East, this could be anywhere between £1,800 and £2,300+ per m2. These prices are for for a good quality extension. Basic quality would naturally cost less and premium would be more.

Let’s say you’re looking for a 5m x 5m extension. The cost of an extension might be around £32,000. In London, maybe even up to £50,000+. That’s just for building the extension.

If we add on 8-10% for professional fees for the architect, planning application, building regulations, structural engineer and so on the cost goes up.
All in all, a single storey extension could cost £40,000 at the lower end. £67,000 in London at the upper end.

The good news is, if you live in a terrced or semi-detached house in 2020, Local Planning Authorities have relaxed the rules and allow for extensions to go to 6 meters . If you live in a detahced house, single storey rear extensions can be up to 8 meters in depth. Just be aware that if your property type is a flat, maisonette, listed building or in a conservation area, then you will need full planning permission.
Side Extensions: Side extensions fall under permitted developent if they do not extend more than half the width of the original house. You can extend a maximum of 3 meters as long as it is a single storey extension and does not extend pas the front elevation.

Research carried out by Nationwide shows how home improvements and home extensions can add significant value to your property. Adding a double bedroom to your house and an en-suite can increase value by 25%. Adding square footage with a kitchen extension and more in general a single storey rear extension will boost the value of your property by 15%.

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