From £2,248
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in RM8. No obligation free quotes ...
From £2,592
Need an Extension Builder in RM8? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £2,248
Trusted and professional extension builder in RM8. Experienced in all extension buildering work and keeping within budget and on quote. WHITE EAGLE...
From £2,360
Homeowners look no further if you want a qualified extension builder to work in your home. LCD Pixel Construction Ltd are tidy and neat, providing ...
From £2,120
Masonic Plumbing and Heating Ltd are here to help customers who need an Extension Builder in RM8. We offer a competitive rate to complete all your ...
From £2,392
Gb construction are here to help customers who need an Extension Builder in RM8. We offer a competitive rate to complete all your extension builde...
From £2,384
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in RM8. No obligation free quotes and m...
From £2,760
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £2,296
Experienced extension builder ready to quote for your work. Mr is the best extension builder in RM8. No obligation free quotes and many happy custo...
From £2,184
JK Doors is a trusted extension builder serving customers in RM8 and the surrounding area. Contact us to today to get a competitive quote for exten...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in RM8 it ranges from £2,120 (Masonic Plumbing and Heating Ltd based in BR2) to £2,760 (Rafix Building based in EN4).
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 RM8 by posting a job with HaMuch and we will send it to extension builders in RM8.
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 - £17,658

Two storey extension - £88,238

Build a timber frame extension - £26,158

Build a swimming pool - £81,158

Single storey extension - £58,168

Side return extension - £43,282

Install an RSJ - £2,358

Outbuilding - £10,158

Build a Mansard loft conversion - £52,158

Loft conversion - £35,235

Build a kitchen extension - £42,158

Hip to gable loft conversion - £42,158

Granny annexe - £87,158

Garden office - £10,158

Convert a Garage - £16,158

Garage - £18,658

Build a flat roof extension - £22,158

Build a dormer loft conversion - £42,158

Concrete foundations - £6,408

Convert a bungalow loft - £29,158

Convert a basement - £39,282