From £2,400
Greater London, RM19
LRB general LTD is a trusted extension builder serving customers in RM19 and the surrounding area. Contact us to today to get a competitive quote f...
From £2,392
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...
From £2,472
L A CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM19. We offer a competitive rate to complete all your extensi...
From £2,520
ABAH Property Services Ltd is a trusted extension builder serving customers in RM19 and the surrounding area. Contact us to today to get a competit...
From £2,592
The England Team is an established extension buildering business in RM19. We come highly recommended and provide competitive quotes for your work.<...
From £2,464
Our building services company Vitec Interiors Ltd have over twenty-eight years’ experience in the trade. Since then we have been helping customer...
From £2,168
SV Roofing & Renovations are here to help customers who need an Extension Builder in RM19. We offer a competitive rate to complete all your extensi...
From £2,128
Trusted and professional extension builder in RM19. Experienced in all extension buildering work and keeping within budget and on quote. Elite Roof...
From £1,736
Experienced extension builder ready to quote for your work. ABC DECORATORS is the best extension builder in RM19. No obligation free quotes and man...
From £2,288
Need an Extension Builder in RM19? DP Construction has been helping local clients (10 mile radius) with their extension buildering jobs for many ye...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in RM19 it ranges from £1,736 (ABC DECORATORS based in DA8) to £2,592 (The England Team based in RM16).
Comparing extension builders estimates for fitting an RSJ gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get rates and quotes to install an RSJ in RM19 by posting a job with HaMuch and we will send it to extension builders in RM19.
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 - £17,616

Two storey extension - £88,174

Build a timber frame extension - £26,116

Build a swimming pool - £81,116

Single storey extension - £57,320

Side return extension - £42,805

Install an RSJ - £2,316

Outbuilding - £10,116

Build a Mansard loft conversion - £52,116

Loft conversion - £34,838

Build a kitchen extension - £42,116

Hip to gable loft conversion - £42,116

Granny annexe - £87,116

Garden office - £10,116

Convert a Garage - £16,116

Garage - £18,616

Build a flat roof extension - £22,116

Build a dormer loft conversion - £42,116

Concrete foundations - £6,366

Convert a bungalow loft - £29,116

Convert a basement - £38,805