From £42,000
London, UB3
Relax... you have found a reliable extension builder in UB3. Millimetre HQR Limited is a friendly and reliable company based in UB3 who consider no...
From £41,280
Trusted and professional extension builder in UB3. Experienced in all extension buildering work and keeping within budget and on quote. SME Builder...
From £36,690
Hayes, UB3
Need to find an Extension Builder near you for all your extension buildering work?
A S BUILDER provides a local, trusted extension builderi...
From £41,370
Reliable construction and Joinery company with a track record of excellence. Skilled professionals delivering innovative solutions for over 20 year...
From £36,240
Hayes, UB3
Nirvair Builders is an established extension buildering business in UB3. We come highly recommended and provide competitive quotes for your work.
From £38,850
Trusted and professional extension builder in UB3. Experienced in all extension buildering work and keeping within budget and on quote. Elegance Co...
From £40,920
Hertfordshire, UB3
Game Planner is a trusted extension builder serving customers in UB3 and the surrounding area. Contact us to today to get a competitive quote for e...
From £40,650
Need an Extension Builder in UB3? Nexdat Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for many years. G...
From £40,920
Hayes, UB3
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £39,750
Relax... you have found a reliable extension builder in UB3. SMC Building Services is a friendly and reliable company based in UB3 who consider no ...

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 UB3 by posting a job with HaMuch and we will send it to extension builders in UB3.
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 - £17,710

Two storey extension - £88,316

Build a timber frame extension - £26,210

Build a swimming pool - £81,210

Single storey extension - £59,208

Side return extension - £43,867

Install an RSJ - £2,410

Outbuilding - £10,210

Build a Mansard loft conversion - £52,210

Loft conversion - £35,723

Build a kitchen extension - £42,210

Hip to gable loft conversion - £42,210

Granny annexe - £87,210

Garden office - £10,210

Convert a Garage - £16,210

Garage - £18,710

Build a flat roof extension - £22,210

Build a dormer loft conversion - £42,210

Concrete foundations - £6,460

Convert a bungalow loft - £29,210

Convert a basement - £39,867