From £10,256
Greater London, EC4M
Need an Extension Builder in EC4M? Flow Property Services has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £9,992
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,104
SCANDIIN is an established and experienced local extension builder in EC4M. Please contact us for a free, no obligation quote and competitive rates...
From £10,392
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 £10,272
Need an Extension Builder in EC4M? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £10,344
Elite Building is an established extension buildering business in EC4M. We come highly recommended and provide competitive quotes for your work.
From £10,488
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 £9,920
Experienced extension builder ready to quote for your work. Kovacs Construction Ltd is the best extension builder in EC4M. No obligation free quote...
From £10,272
At Kovacs Construction, you can rely on our talented builders and engineers to deliver unrivalled building services solutions. Let us show you our ...
From £10,096
Omniform are here to help customers who need an Extension Builder in EC4M. We offer a competitive rate to complete all your extension buildering jo...

Garden offices range from the cheapest of £9,920 (Kovacs Construction Ltd based in EC1N) to the dearest of £10,488 (Elite Building based in WC2A), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in EC4M by posting a job with HaMuch. We'll send it to extension builders in EC4M.
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