From £17,540
NK Living is an interior design led design & build company with a passion for reinventing period living spaces for modern lifestyles, whether that ...
From £17,772
Bonsai Property Services are here to help customers who need an Extension Builder in Marleybone. We offer a competitive rate to complete all your e...
From £17,580
Experienced extension builder ready to quote for your work. Azur London is the best extension builder in Marleybone. No obligation free quotes and ...
From £17,892
We understand that the appearance of a property not only says something about your home or investment, it could be a deal maker or breaker for that...
From £17,660
Experienced extension builder ready to quote for your work. Duke of Design is the best extension builder in Marleybone. No obligation free quotes a...
From £17,500
Duke of Design are an avant-garde, bright and ingenious design and refurbishment company driven by the intention of creating spaces perfected by de...
From £17,772
Experienced extension builder ready to quote for your work. D’Eufemia Co is the best extension builder in Marleybone. No obligation free quotes a...
From £17,596
Need to find an Extension Builder near you for all your extension buildering work?
Pillar Contractors Ltd provides a local, trusted extensi...
From £17,588
Dominic Payte - Design & Build is an established extension buildering business in Marleybone. We come highly recommended and provide competitive qu...

Underpinning ranges from £17,500 (Duke of Design based in W2) to £17,932 (Marylebone Interiors London Ltd based in W1H), 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 Marleybone by posting a job with HaMuch and we will send it to extension builders in Marleybone.
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 - £17,683

Two storey extension - £88,275

Build a timber frame extension - £26,183

Build a swimming pool - £81,183

Single storey extension - £58,664

Side return extension - £43,561

Install an RSJ - £2,383

Outbuilding - £10,183

Build a Mansard loft conversion - £52,183

Loft conversion - £35,468

Build a kitchen extension - £42,183

Hip to gable loft conversion - £42,183

Granny annexe - £87,183

Garden office - £10,183

Convert a Garage - £16,183

Garage - £18,683

Build a flat roof extension - £22,183

Build a dormer loft conversion - £42,183

Concrete foundations - £6,433

Convert a bungalow loft - £29,183

Convert a basement - £39,561