Bill Matharu
Matharu Buildings is an established extension buildering business in Uxbridge. We come highly recommended and provide competitive quotes for your w...
Bhupinder Singh
Trusted and professional extension builder in Uxbridge. Experienced in all extension buildering work and keeping within budget and on quote. Elegan...
Relax... you have found a reliable extension builder in Uxbridge. RODOF Ltd is a friendly and reliable company based in Uxbridge who consider no jo...
Uxbridge, UB8
GMB BUILDING SERVICES is an established and experienced local extension builder in Uxbridge. Please contact us for a free, no obligation quote and ...
Sheppard Construction Ltd is a trusted extension builder serving customers in Uxbridge and the surrounding area. Contact us to today to get a compe...
Experienced extension builder ready to quote for your work. Tej Builders is the best extension builder in Uxbridge. No obligation free quotes and m...
ROBINSON AND EDGSON BUILDERS is a trusted extension builder serving customers in Uxbridge and the surrounding area. Contact us to today to get a co...
Alister Lawson
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Experienced extension builder ready to quote for your work. KRSS CONSTRUCTION is the best extension builder in Uxbridge. No obligation free quotes ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Uxbridge it ranges from £2,280 (Tej Builders based in UB7) to £2,632 (GMB BUILDING SERVICES based in UB8).
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 Uxbridge by posting a job with HaMuch and we will send it to extension builders in Uxbridge.
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 - £17,752

Two storey extension - £88,378

Build a timber frame extension - £26,252

Build a swimming pool - £81,252

Single storey extension - £60,040

Side return extension - £44,335

Install an RSJ - £2,452

Outbuilding - £10,252

Build a Mansard loft conversion - £52,252

Loft conversion - £36,113

Build a kitchen extension - £42,252

Hip to gable loft conversion - £42,252

Granny annexe - £87,252

Garden office - £10,252

Convert a Garage - £16,252

Garage - £18,752

Build a flat roof extension - £22,252

Build a dormer loft conversion - £42,252

Concrete foundations - £6,502

Convert a bungalow loft - £29,252

Convert a basement - £40,335