From £36,600
Greater London, EC1N
Experienced extension builder ready to quote for your work. Kovacs Construction Ltd is the best extension builder in EC1N. No obligation free quote...
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 £40,560
London, EC1N
Experienced extension builder ready to quote for your work. Oxford West is the best extension builder in EC1N. No obligation free quotes and many h...
From £39,750
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £37,950
Hatton Garden, EC1N
JM Building Services is a trusted extension builder serving customers in EC1N and the surrounding area. Contact us to today to get a competitive qu...
From £38,670
SCANDIIN is an established and experienced local extension builder in EC1N. Please contact us for a free, no obligation quote and competitive rates...
From £60,720
We build Lofts. We build Extensions. We undertake conversions. Our Terms and conditions apply as shown in our starter packs.
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 EC1N? Aylaa Exclusive has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £37,410
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

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 EC1N by posting a job with HaMuch and we will send it to extension builders in EC1N.
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 - £17,853

Two storey extension - £88,529

Build a timber frame extension - £26,353

Build a swimming pool - £81,353

Single storey extension - £62,056

Side return extension - £45,469

Install an RSJ - £2,553

Outbuilding - £10,353

Build a Mansard loft conversion - £52,353

Loft conversion - £37,058

Build a kitchen extension - £42,353

Hip to gable loft conversion - £42,353

Granny annexe - £87,353

Garden office - £10,353

Convert a Garage - £16,353

Garage - £18,853

Build a flat roof extension - £22,353

Build a dormer loft conversion - £42,353

Concrete foundations - £6,603

Convert a bungalow loft - £29,353

Convert a basement - £41,469