From £37,050
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £41,100
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Nine Elms. No obligation f...
From £40,380
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £39,750
Need an Extension Builder in Nine Elms? Build Team has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £36,240
Experienced extension builder ready to quote for your work. Sturdy Evolution Developments Ltd is the best extension builder in Nine Elms. No obliga...
From £37,410
Need to find an Extension Builder near you for all your extension buildering work?
BUILD TEAM provides a local, trusted extension builderin...
From £42,630
Our building services company Inside Out Property Refurbishment Ltd have ten years’ experience and have been helping customers in London and the ...
From £41,010
Experienced extension builder ready to quote for your work. Gustav Building Services is the best extension builder in Nine Elms. No obligation free...
From £37,950
I am Gustav, I run a team of professionals who offer competitive prices, design guide, materials supply, professional advice and project management...

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 Nine Elms by posting a job with HaMuch and we will send it to extension builders in Nine Elms.
"Basement conversion" - LAMBETH, job posted 05/02/25
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 - £17,690

Two storey extension - £88,284

Build a timber frame extension - £26,190

Build a swimming pool - £81,190

Single storey extension - £58,792

Side return extension - £43,633

Install an RSJ - £2,390

Outbuilding - £10,190

Build a Mansard loft conversion - £52,190

Loft conversion - £35,528

Build a kitchen extension - £42,190

Hip to gable loft conversion - £42,190

Granny annexe - £87,190

Garden office - £10,190

Convert a Garage - £16,190

Garage - £18,690

Build a flat roof extension - £22,190

Build a dormer loft conversion - £42,190

Concrete foundations - £6,440

Convert a bungalow loft - £29,190

Convert a basement - £39,633