From £41,730
Need to find an Extension Builder near you for all your extension buildering work?
GRAPHENE provides a local, trusted extension buildering ...
From £41,640
Pinner, HA5
Relax... you have found a reliable extension builder in Pinner. Building Service and Support Ltd is a friendly and reliable company based in Pinner...
From £36,870
Excelsior Construction Ltd is an established and experienced local extension builder in Pinner. Please contact us for a free, no obligation quote a...
From £42,810
Pinner Lancashire, HA5
Experienced extension builder ready to quote for your work. none is the best extension builder in Pinner. No obligation free quotes and many happy ...
From £38,670
Experienced extension builder ready to quote for your work. Kieran Mccormack Building Serv is the best extension builder in Pinner. No obligation f...
From £37,770
Middlesex, HA5
Experienced extension builder ready to quote for your work. RMB Building and Development Ltd is the best extension builder in Pinner. No obligation...
From £38,400
Relax... you have found a reliable extension builder in Pinner. West7Services UK is a friendly and reliable company based in Pinner who consider no...
From £37,050
Pinner, HA5
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £42,000
A Roofing company which prides itself on quality and superior service. As a company we have decades of experience within the industry and have diff...
From £39,660
Need to find an Extension Builder near you for all your extension buildering work?
Oldfield Construction provides a local, trusted extensio...

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 Pinner by posting a job with HaMuch and we will send it to extension builders in Pinner.
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 - £17,692

Two storey extension - £88,288

Build a timber frame extension - £26,192

Build a swimming pool - £81,192

Single storey extension - £58,840

Side return extension - £43,660

Install an RSJ - £2,392

Outbuilding - £10,192

Build a Mansard loft conversion - £52,192

Loft conversion - £35,550

Build a kitchen extension - £42,192

Hip to gable loft conversion - £42,192

Granny annexe - £87,192

Garden office - £10,192

Convert a Garage - £16,192

Garage - £18,692

Build a flat roof extension - £22,192

Build a dormer loft conversion - £42,192

Concrete foundations - £6,442

Convert a bungalow loft - £29,192

Convert a basement - £39,660