From £36,330
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £40,920
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £38,040
A Twickenham Roofing Service is an established extension buildering business in Strawberry Hill. We come highly recommended and provide competitive...
From £41,370
Planning Design Building is a trusted extension builder serving customers in Strawberry Hill and the surrounding area. Contact us to today to get a...
From £38,400
Maltwood are here to help customers who need an Extension Builder in Strawberry Hill. We offer a competitive rate to complete all your extension bu...
From £41,280
CALLAGHAN CONSTRUCTION is a trusted extension builder serving customers in Strawberry Hill and the surrounding area. Contact us to today to get a c...
From £37,860
Experienced extension builder ready to quote for your work. Everest Design Ltd is the best extension builder in Strawberry Hill. No obligation free...
From £39,750
Need an Extension Builder in Strawberry Hill? Twickenham Home Ltd has been helping local clients (10 mile radius) with their extension buildering j...
From £37,320
Based in West London, Darwin Home Improvements is a friendly professional, conscientious building company you can trust; built on over 20 years of ...
From £38,220
Experienced extension builder ready to quote for your work. Active Builders London ltd is the best extension builder in Strawberry Hill. No obligat...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in Strawberry Hill by posting a job with HaMuch and we will send it to extension builders in Strawberry Hill.
"Basement conversion" - TW2, job posted 05/04/26
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,629

Two storey extension - £88,193

Build a timber frame extension - £26,129

Build a swimming pool - £81,129

Single storey extension - £57,576

Side return extension - £42,949

Install an RSJ - £2,329

Outbuilding - £10,129

Build a Mansard loft conversion - £52,129

Loft conversion - £34,958

Build a kitchen extension - £42,129

Hip to gable loft conversion - £42,129

Granny annexe - £87,129

Garden office - £10,129

Convert a Garage - £16,129

Garage - £18,629

Build a flat roof extension - £22,129

Build a dormer loft conversion - £42,129

Concrete foundations - £6,379

Convert a bungalow loft - £29,129

Convert a basement - £38,949