From £17,476
A to Z Builders Ltd are here to help customers who need an Extension Builder in Houses Of Parliament. We offer a competitive rate to complete all y...
From £17,756
F & F Building Services is an established extension buildering business in Houses Of Parliament. We come highly recommended and provide competitive...
From £17,492
Relax... you have found a reliable extension builder in Houses Of Parliament. London Projects Ltd is a friendly and reliable company based in House...
From £15,708
Here at London Design and Build, our team of architects, interior designers, structural engineers and contractors, offer a bespoke, turn-key servic...
From £17,820
Cliden Construction (London) is a trusted extension builder serving customers in Houses Of Parliament and the surrounding area. Contact us to today...
From £17,836
Luxury Movement is an established extension buildering business in Houses Of Parliament. We come highly recommended and provide competitive quotes ...
From £18,004
Welcome to Adamko Interiors Ltd. We specialize in customized interior design solutions, prioritizing customer satisfaction and creating safe, comfo...
From £17,852
Experienced extension builder ready to quote for your work. Mayfair Design is the best extension builder in Houses Of Parliament. No obligation fre...
From £17,884
Experienced extension builder ready to quote for your work. Future Homes Design and Build is the best extension builder in Houses Of Parliament. No...
From £17,604
Trusted and professional extension builder in Houses Of Parliament. Experienced in all extension buildering work and keeping within budget and on q...

Underpinning ranges from £15,708 (London Design And Build based in SW1A) to £18,004 (Adamko Dry Lining London based in WC2N), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Houses Of Parliament by posting a job with HaMuch and we will send it to extension builders in Houses Of Parliament.
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 - £17,543

Two storey extension - £88,065

Build a timber frame extension - £26,043

Build a swimming pool - £81,043

Single storey extension - £55,864

Side return extension - £41,986

Install an RSJ - £2,243

Outbuilding - £10,043

Build a Mansard loft conversion - £52,043

Loft conversion - £34,155

Build a kitchen extension - £42,043

Hip to gable loft conversion - £42,043

Granny annexe - £87,043

Garden office - £10,043

Convert a Garage - £16,043

Garage - £18,543

Build a flat roof extension - £22,043

Build a dormer loft conversion - £42,043

Concrete foundations - £6,293

Convert a bungalow loft - £29,043

Convert a basement - £37,986