From £2,544
Bromley, BR2
Mardle Developments Ltd is a Bromley based family company who established themselves in 1998 and became incorporated in 2007.We carry out a...
From £2,360
Need to find an Extension Builder near you for all your extension buildering work?
Heritage Roofing and Building Solutions Ltd provides a l...
From £2,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,088
EXCELL BUILDING is a trusted extension builder serving customers in BR2 and the surrounding area. Contact us to today to get a competitive quote fo...
From £2,520
Relax... you have found a reliable extension builder in BR2. PROBUILD (SE) LTD is a friendly and reliable company based in BR2 who consider no job ...
From £2,256
Welcome to A & A Roofing SolutionsWe are a professional family-run team experienced in all aspects of roofing, ranging from complete new ro...
From £2,240
Need an Extension Builder in BR2? LEXA BUILDING SERVICES LTD has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £1,656
Highly dedicated company to deliver exceptional customer service
From £2,216
Inscope Management Services Ltd are here to help customers who need an Extension Builder in BR2. We offer a competitive rate to complete all your e...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BR2 it ranges from £1,656 (London Quality Construction Group Limited based in BR2) to £2,544 (Mardle Developments Ltd based in BR2).
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 BR2 by posting a job with HaMuch and we will send it to extension builders in BR2.
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 - £17,560

Two storey extension - £88,090

Build a timber frame extension - £26,060

Build a swimming pool - £81,060

Single storey extension - £56,200

Side return extension - £42,175

Install an RSJ - £2,260

Outbuilding - £10,060

Build a Mansard loft conversion - £52,060

Loft conversion - £34,313

Build a kitchen extension - £42,060

Hip to gable loft conversion - £42,060

Granny annexe - £87,060

Garden office - £10,060

Convert a Garage - £16,060

Garage - £18,560

Build a flat roof extension - £22,060

Build a dormer loft conversion - £42,060

Concrete foundations - £6,310

Convert a bungalow loft - £29,060

Convert a basement - £38,175