Flat roof extensions are one of the most common forms of home extensions in the UK. This is because they are generally easier to build, and are thus cheaper, than pitched roofs. Another reason flat roofs are popular is that they can give a more contemporary feel. However, there are disadvantages, such as a high level of maintenance and it does limit the height of your new extension’s ceiling.

Flat roofs are ideal for small structures as they save space and, contrary to what most people believe, a flat roof should always have a slight pitch to enable rainwater to drain. If you decide to opt for a flat roof, it is still possible to install design features such as skylights and light wells and you may even be able take advantage of the design to create a roof terrace – giving you more outdoor space.(This will need to be specified during the design process and is subject to planning approval.)
For inspiration on how your London flat roof extension could look, take a look at our case studies below:

Rosebery Road, Haringey












This North London home has been transformed with a flat roof side return extension. Light wells, made of reinforced glass, were installed to ensure that plenty of light penetrated the room. The extra space has been used to create a large kitchen diner and a roof terrace on top of the extension roof. This feature has also allowed more natural light to enter a pre-existing bedroom. Click here to see more.

Kings Road, Kingston-on-Thames



The owners of this South West London home have added a flat roof extension to their home to create a spacious and light kitchen diner. The floor to ceiling bi-folding doors give a seamless feel between the garden and the kitchen. Skylights have been installed over the dining table to let in as much daylight as possible. For more images and details, click here.

Colyton Road, Dulwich Southwark

This contemporary extension located in Dulwich, South London has incorporated design features that allow as much light as possible to enter the open plan living space. Picture bi-folding doors help to bring the outdoors in and the three skylights offer, not just light, but also an interesting design feature. For more information and pictures, click here.

Manor Grove, Richmond

For this build in South West London, we demolished an existing kitchen extension and built a modern flat roof extension to open up the rear of the house. Our team transformed this space into a kitchen diner that overlooks their landscaped garden, which we also created. Four skylights and two French windows give the room a light and spacious feel, and connect the space to the garden. To see more pictures, click here.

Brondesbury Road, Queens Park

This property in North West London shows that you do not need a large space, or even a house, to have a flat roof kitchen extension in London. This ground floor flat has been transformed with a clever extension and reconfiguration of the flat. A single long light well, a roof lantern and large bi-folding doors bring light into what might otherwise be a dark room. For more information, click here.

Balfour Road, Highbury Islington

Contemporary and design-led, this Islington property has been brought into the 21st century with a wrap-around extension including a flat roof side return extension. Featuring a long light well over the kitchen, this open plan kitchen diner is designed to keep light flowing into the room. The bi-folding doors connect the inside with the modern decking outside – giving the owners the option of opening the room to the garden when the weather permits. For more details and images, click here.
Want to transform your London home with a flat roof extension? Then contact Simply Extend for a free site survey.

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