From £17,524
Hertfordshire, WD19
Cannon Build Solutions is an established extension buildering business in WD19. We come highly recommended and provide competitive quotes for your ...
From £17,724
Relax... you have found a reliable extension builder in WD19. C S C BUILDINGS LTD is a friendly and reliable company based in WD19 who consider no ...
From £17,804
Watford, WD19
Trusted and professional extension builder in WD19. Experienced in all extension buildering work and keeping within budget and on quote. Ideal Plac...
From £17,924
Sharp Building Ltd is an established and experienced local extension builder in WD19. Please contact us for a free, no obligation quote and competi...
From £17,780
Hertfordshire, WD19
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £17,964
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £20,260
Trusted and professional extension builder in WD19. Experienced in all extension buildering work and keeping within budget and on quote. Design & B...
From £17,812
Relax... you have found a reliable extension builder in WD19. Frame Brickwork is a friendly and reliable company based in WD19 who consider no job ...
From £17,924
Trusted and professional extension builder in WD19. Experienced in all extension buildering work and keeping within budget and on quote. S2M VENTUR...
From £17,924
Experienced extension builder ready to quote for your work. 1st Choice Builders UK is the best extension builder in WD19. No obligation free quotes...

Underpinning ranges from £17,524 (Cannon Build Solutions based in WD19) to £20,260 (Design & Build Builders Ltd based in WD18), 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 WD19 by posting a job with HaMuch and we will send it to extension builders in WD19.
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 - £18,064

Two storey extension - £88,846

Build a timber frame extension - £26,564

Build a swimming pool - £81,564

Single storey extension - £66,280

Side return extension - £47,845

Install an RSJ - £2,764

Outbuilding - £10,564

Build a Mansard loft conversion - £52,564

Loft conversion - £39,038

Build a kitchen extension - £42,564

Hip to gable loft conversion - £42,564

Granny annexe - £87,564

Garden office - £10,564

Convert a Garage - £16,564

Garage - £19,064

Build a flat roof extension - £22,564

Build a dormer loft conversion - £42,564

Concrete foundations - £6,814

Convert a bungalow loft - £29,564

Convert a basement - £43,845