House Extensions London

Home and Kitchen Extension Builders in North London

If you live in London or Hertfordshire, extending your home gives you more space and increases the value of your property too. Our experienced team has completed many bespoke home and kitchen extensions. We offer two types of building packages. Design and Build - when our architect works closely with you to prepare the architectural and structural drawings, and then submits the plans to your Local Authority. When the application is approved, our skilled construction team completes your extension to the highest standards. If you already have hired an architect to do the design, we can build your extension following their drawings and specifications. Upon completion, we provide all our client's with a ten-year structural warranty and all the necessary building certificates. Our latest extension projects include a rear house extension in Marriott Road, Barnet, two storey home extension in Hampstead, highly glazed extension in Mill Hill, North West London, and a kitchen extension in Welwyn Garden City, Hertfordshire. 

House Extension Design

When it comes to designing your extension, you will usually be restricted to four basic variations: a single or a double-storey extension with a flat or a pitched roof. To get an idea if your plans are likely to be accepted, take a look around your area to see what types of extensions other people have built. Your design might even qualify under the Permitted Development, in which case you will not need to apply for Planning Permission

3D render of a singley storey wrap around extension in Hampstead

Single Storey House and Kitchen Extensions

A single storey extension is a popular type of home improvement project, as it visually connects the house with the garden. You can choose between a rear, a side return and a wrap-around house extension (pictured). While most one storey rear and side extensions qualify under the Permitted Development, wrap around extensions always require Planning Permission. You could use your new space to create a large open-plan kitchen, a bright lounge area with a fireplace, or your private gym.

Double storey house extension in Welwyn Garden City, Hertfordshire

Double Storey House Extensions

A double storey house extension might be more cost-effective than a single storey, as the roof and the foundations usually tend to be the most expensive parts of the build. You can add a two storey extension to the back or the side of the property (the latter will usually need to have a pitched roof similar to the existing one in order to comply with planning regulations). You could extend your kitchen, and add an extra bedroom, a playroom for the children, or an office upstairs.

How much does a House Extension Cost?

It will mostly depend on the quality of the finish. While you can build a basic quality extension for around £1500 per square metre, if you want a high-end finish, the cost can go up to £3000 per sq. m. A high-quality extension can increase the value of your London or Hertfordshire home by up to 25 per cent. 

Our recent house extension projects in London and Hertfordshire

Rear house extension in Marriott Road

Rear House Extension in Marriott Road, Barnet

Highly glazed extension in Mill Hill

Glazed Extension in Mill Hill, North West London

Double storey extension in Hampstead

Two Storey Extension in Hampstead, NW London

Kitchen extension in Welwyn Garden City, Hertfordshire

Kitchen Extension in Welwyn, Hertfordshire

Request a quote


183 Edgware Road


0208 205 8173

We operate across all of North London and North West London including Hampstead, Mill Hill, Finchley, Edgware and Barnet. We also cover parts of Hertfordshire including Bushey, Elstree, Potters Bar, and St. Albans.