From £41,730
Southall, UB1
D.S Builders is a trusted extension builder serving customers in UB1 and the surrounding area. Contact us to today to get a competitive quote for e...
From £31,200
Experienced extension builder ready to quote for your work. Kairon Construction is the best extension builder in UB1. No obligation free quotes and...
From £42,540
Greater London, UB1
Need an Extension Builder in UB1? House Builders London has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £40,470
Need an Extension Builder in UB1? S.K Singh has been helping local clients (10 mile radius) with their extension buildering jobs for many years. Ge...
From £39,300
Trusted and professional extension builder in UB1. Experienced in all extension buildering work and keeping within budget and on quote. BAL CONSTRU...
From £42,090
Need an Extension Builder in UB1? Marz Building Maintenance has been helping local clients (10 mile radius) with their extension buildering jobs fo...
From £37,590
Berkshire, UB1
Relax... you have found a reliable extension builder in UB1. Randhawa Design & Build Ltd is a friendly and reliable company based in UB1 who consid...
From £40,470
United Design & Build Ltd is an established extension buildering business in UB1. We come highly recommended and provide competitive quotes for you...
From £42,090
Southall, UB1
Relax... you have found a reliable extension builder in UB1. RAJ BUILDING CONTRACTORS LTD is a friendly and reliable company based in UB1 who consi...
From £39,300
F&S BUILDERS LTD is an established and experienced local extension builder in UB1. Please contact us for a free, no obligation quote and competitiv...

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 UB1 by posting a job with HaMuch and we will send it to extension builders in UB1.
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 - £17,694

Two storey extension - £88,290

Build a timber frame extension - £26,194

Build a swimming pool - £81,194

Single storey extension - £58,872

Side return extension - £43,678

Install an RSJ - £2,394

Outbuilding - £10,194

Build a Mansard loft conversion - £52,194

Loft conversion - £35,565

Build a kitchen extension - £42,194

Hip to gable loft conversion - £42,194

Granny annexe - £87,194

Garden office - £10,194

Convert a Garage - £16,194

Garage - £18,694

Build a flat roof extension - £22,194

Build a dormer loft conversion - £42,194

Concrete foundations - £6,444

Convert a bungalow loft - £29,194

Convert a basement - £39,678