From £38,040
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in UB10. No obligation free quotes...
1 review
From £39,660
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £41,910
Need an Extension Builder in UB10? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many ye...
From £40,650
Member since August 2026
Relax... you have found a reliable extension builder in UB10. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in UB10 who co...
From £39,660
Need an Extension Builder in UB10? VA Structures has been helping local clients (10 mile radius) with their extension buildering jobs for many year...
From £40,650
Trusted and professional extension builder in UB10. Experienced in all extension buildering work and keeping within budget and on quote. DC Build &...
From £41,010
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £42,360
DP Services is a fully insured friendly local company which has been trading since 2002 and delivers high quality building work in domestic extensi...
From £39,210
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £40,920
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...

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 UB10 by posting a job with HaMuch and we will send it to extension builders in UB10.
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 - £17,758

Two storey extension - £88,388

Build a timber frame extension - £26,258

Build a swimming pool - £81,258

Single storey extension - £60,168

Side return extension - £44,407

Install an RSJ - £2,458

Outbuilding - £10,258

Build a Mansard loft conversion - £52,258

Loft conversion - £36,173

Build a kitchen extension - £42,258

Hip to gable loft conversion - £42,258

Granny annexe - £87,258

Garden office - £10,258

Convert a Garage - £16,258

Garage - £18,758

Build a flat roof extension - £22,258

Build a dormer loft conversion - £42,258

Concrete foundations - £6,508

Convert a bungalow loft - £29,258

Convert a basement - £40,407