From £40,380
Need an Extension Builder in Fleet Street? Flow Property Services has been helping local clients (5 mile radius) with their extension buildering jo...
From £37,410
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £38,670
SCANDIIN is an established and experienced local extension builder in Fleet Street. Please contact us for a free, no obligation quote and competiti...
From £41,910
We have the experience and knowledge to carry out any project, big or small. Our team of experts thoroughly plan the budget and manage your projec...
From £40,560
Need an Extension Builder in Fleet Street? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for ...
From £41,370
Elite Building is an established extension buildering business in Fleet Street. We come highly recommended and provide competitive quotes for your ...
From £42,990
Elite Building And Heating was founded by Davinder Dhanda in 2018. Based in Central London, Davinder Worked on Construction sites since the age of ...
From £36,600
Experienced extension builder ready to quote for your work. Kovacs Construction Ltd is the best extension builder in Fleet Street. No obligation fr...
From £40,560
At Kovacs Construction, you can rely on our talented builders and engineers to deliver unrivalled building services solutions. Let us show you our ...
From £38,580
Omniform are here to help customers who need an Extension Builder in Fleet Street. We offer a competitive rate to complete all your extension build...

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 Fleet Street by posting a job with HaMuch and we will send it to extension builders in Fleet Street.
"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 - £17,714

Two storey extension - £88,320

Build a timber frame extension - £26,214

Build a swimming pool - £81,214

Single storey extension - £59,272

Side return extension - £43,903

Install an RSJ - £2,414

Outbuilding - £10,214

Build a Mansard loft conversion - £52,214

Loft conversion - £35,753

Build a kitchen extension - £42,214

Hip to gable loft conversion - £42,214

Granny annexe - £87,214

Garden office - £10,214

Convert a Garage - £16,214

Garage - £18,714

Build a flat roof extension - £22,214

Build a dormer loft conversion - £42,214

Concrete foundations - £6,464

Convert a bungalow loft - £29,214

Convert a basement - £39,903