From £40,560
Grays, RM20
L A CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extensi...
From £41,910
The England Team is an established extension buildering business in RM20. We come highly recommended and provide competitive quotes for your work.<...
From £38,580
FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extens...
From £36,780
Experienced extension builder ready to quote for your work. Renewvate is the best extension builder in RM20. No obligation free quotes and many hap...
From £40,470
Our building services company Vitec Interiors Ltd have over twenty-eight years’ experience in the trade. Since then we have been helping customer...
From £41,190
Trusted and professional extension builder in RM20. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS BU...
From £35,970
Trusted and professional extension builder in RM20. Experienced in all extension buildering work and keeping within budget and on quote. Access Bui...
From £35,970
HYDER CONSTRUCTION LTD is a trusted extension builder serving customers in RM20 and the surrounding area. Contact us to today to get a competitive ...
From £39,750
LRB general LTD is a trusted extension builder serving customers in RM20 and the surrounding area. Contact us to today to get a competitive quote f...
From £39,660
We are LRB General LTD and we would like to get to know you a bit better. Right, so we go first.We’ve been in the construction and renovation ind...

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 RM20 by posting a job with HaMuch and we will send it to extension builders in RM20.
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 - £17,641

Two storey extension - £88,211

Build a timber frame extension - £26,141

Build a swimming pool - £81,141

Single storey extension - £57,816

Side return extension - £43,084

Install an RSJ - £2,341

Outbuilding - £10,141

Build a Mansard loft conversion - £52,141

Loft conversion - £35,070

Build a kitchen extension - £42,141

Hip to gable loft conversion - £42,141

Granny annexe - £87,141

Garden office - £10,141

Convert a Garage - £16,141

Garage - £18,641

Build a flat roof extension - £22,141

Build a dormer loft conversion - £42,141

Concrete foundations - £6,391

Convert a bungalow loft - £29,141

Convert a basement - £39,084