House Extensions London


Interested in House Extensions? Contact Us Today


Having completed every type of house extension across the capital we are proud of our ability in executing these works, like our lofts, we don’t subcontract the project to another builder. 

Our house extension building teams, who we trained are the ones doing the works to your property.

This way of working, along with the fundamentals that our clients come to expect of Clapham construction service, make us London’s leader in-house, kitchen, rear and side return extensions. 

We offer a 100% bespoke house extension service and can include all the associated works, including decoration, flooring, gardening and kitchens.

House Extension Complete Process

We manage the design and build of your home extension for you, planning permission, structural design, building control and your project manager will be on your site almost daily to oversee the works and keep you updated.

Quality Craftsmanship & Materials

Our works are warrantied, but they will stand much monger than that. We are builders primarily and our teams are experts with quality on our mind – you will get weekly inspections by the owner to ensure we deliver.

10 – Year Warranty On All Home Extensions

Exactly what it says. We provide you with a warranty to cover you and your home for any defect from our works so you don’t have to worry. In addition, you get an independent certificate by the regulators confirming that our works meet the approved building standards.

Home Extensions Add Value

Quality made house extensions with us can add up to 25% to the value of your home making it one the best investments you can make.

Looking For Home Extensions in London? Contact Us Today


In London no two properties are alike and neither are their owners. The same can be said of the lofts in London, however having built hundreds, we at Clapham Construction Service, understand a thing or two about them. Though the finish may be different for every client the structure follows a few set designs.

We have laid them out for you here to gain a better understanding. During the home consultation, we will help you choose the right one for you and your home.

House Extensions London

View Our Design and Build Process

Check out the work of our amazing teams and
what we can achieve in your home

Want some friendly advice?

Contact Us For Advice On Home Extensions

Our clients love us, because we provide honest and straightforward information and advice, no sales pitch, no hassle! We are trusted because we aim to satisfy all of our clients, not just build a job for profit. We do this by being open and honest from the start right up to the finish. So if you want to get some information or want some advice about a potential project, just give us a call or drop a line.

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