Warranty And Insurance


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We offer you a

10 Year Warranty

Here at Clapham Construction Service we are proud of each one of our jobs. Many years of experience in building loft conversions in London and extensions has given us the confidence in the quality of our work.
More than just relying on our experience we actively review our works each week, with one of our owners always working in the capacity of quality control officer and reviewing your home, the works and the teams.  All our projects come fully regulated and independently inspected with a certificate of compliance.
If that wasn’t enough… we provide a 10 -year warranty for  all of our projects. We will also keep in touch with you throughout the 10 year period, in case you ever you need us.
Weekly Quality
Fully compliant with the latest building regulations
Independently Inspected by
an approved surveyor
Latest Health &
Safety Practices
After Build Care –
Delivered by Us
10 Year Warranty –
Fully Transferable
We offer you


We are working in your home, with you and we are the ones doing the building. We are qualified in the latest health and safety practices and working closely with the HSE and our tradesmen to remain so. In addition we will maintain a minimum of £5 Million in liability cover for our works and will provide you will our details before works begin. 
£5 Million in
Insurance Cover
Cover for you and your
neighbours as standard
Mortgage lender
approved policy
FSA approved insurer with
comprehensive cover

Quill Lane

Rear Dormer Conversion
incorporating the retained
chimney into the design.

Hillbrook Road

Rear Dormer conversion
with Juliet Balcony.

Courcy Road

Loft Conversion with
Exposed brickwork

Case Studies

See what we can do and get some ideas!

Want some friendly advice?

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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.

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