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A basement is the ideal way to extend your living space in London. From designer bathrooms and kitchens to wireless media rooms, flood-lit swimming pools and walk-in wine cellars, a basement development opens up a world of possibility.

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In-house Design
and Build

We are a full-service design and build company with architects, surveyors, designers and project managers all working under one roof. This means we can provide an end-to-end solution without you having to manage different contractors & suppliers.

Our Process
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Basement Ideas to Inspire

Our Difference

Our
Difference

Insurance Backed Guarantee

We are able to offer a full 10 year insurance backed guarantee at a premium for our basement construction works if required

Assigned JCT contract

Our commitment to deliver your project on schedule and on budget

35+ years of experience

Clients have confidence in our knowledge, expertise and word of mouth referrals

Family-run business

Honesty, loyalty and trust are what define our business values

A stress-free build

We assign a dedicated project manager to keep your build running smoothly

No sub-contractors

Being a close-knit team means we can keep all our work in-house
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    I under-estimated how useful a basement conversion would be

    I under-estimated how useful a basement conversion would be – it’s the one room that we now use most in the house. I’d definitely recommend Cool Basements to any of my clients and contacts.

    Adam Pearson

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    The team was very flexible, responsive and provided us with some great advice during the design and planning permission process

    James Little was extremely good at working with architects, building engineers and the Council. We were also impressed with the meticulous attention to the building and engineering requirements while being imaginative at maximising the aesthetics of the building.

    Solomon Soquar

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    James, Peter and the team are a highly knowledgeable, competent and professional outfit

    They kept us fully informed as our project evolved and worked collaboratively with us to resolve unforeseen problems. As busy professionals, we simply left them to get on with it, which they did. The team were always punctual, reliable, tidy and friendly which certainly helped with neighbours. We’re delighted with our end result and finish, and would certainly hire them again.

    Sonia Gogna

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    James, Peter and their team were both professional and accommodating, nothing was too much trouble

    We are delighted with our new basement and very pleased with the work carried out by Cool Basements. James, Peter and their team were both professional and accommodating, nothing was too much trouble. Everyone who worked on the project were courteous and friendly and had a great attitude, I very much enjoyed working with them and was made to feel part of the team! James did an excellent job making sure that everything came together to create a wonderful finished new space. I would highly recommend to others.

    Mr Hudson

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