Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in BH18. Experienced in all extension buildering work and keeping within budget and on quote. WR WARREN ...
Trusted and professional extension builder in BH18. Experienced in all extension buildering work and keeping within budget and on quote. Hayes Land...
Experienced extension builder ready to quote for your work. JOSCELYNE BUILDERS is the best extension builder in BH18. No obligation free quotes and...
Richard Thomas
Need an Extension Builder in BH18? RNTP ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Ge...
Trusted and professional extension builder in BH18. Experienced in all extension buildering work and keeping within budget and on quote. MDW KITCHE...
BIRCHES CONSTRUCTION LTD are here to help customers who need an Extension Builder in BH18. We offer a competitive rate to complete all your extensi...
Experienced extension builder ready to quote for your work. Nevil Rose is the best extension builder in BH18. No obligation free quotes and many ha...
Urban Projects are here to help customers who need an Extension Builder in BH18. We offer a competitive rate to complete all your extension builder...
George DIXON
MARLEY TRained roofer, reliable ,flat roofs , slating and tiling,fascias and gutters. All repairs, no job too small

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BH18 it ranges from £1,400 (GMD Roofing based in BH15) to £2,784 (RNTP ltd based in BH14).
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 BH18 by posting a job with HaMuch and we will send it to extension builders in BH18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Poole | £38 | £250 |
| Install An RSJ near Bournemouth | £38 | £257 |
| Install An RSJ near Christchurch | £36 | £251 |
| Install An RSJ near New Forest | £32 | £245 |
| Install An RSJ near Dorchester | £30 | £230 |
| Install An RSJ near Weymouth | £33 | £260 |
| Install An RSJ near Salisbury | £35 | £247 |
| Install An RSJ near Totton | £34 | £243 |
| Install An RSJ near Romsey | £32 | £230 |
| Install An RSJ near Southampton | £34 | £243 |
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 - £17,494

Two storey extension - £87,990

Build a timber frame extension - £25,994

Build a swimming pool - £80,994

Single storey extension - £54,872

Side return extension - £41,428

Install an RSJ - £2,194

Outbuilding - £9,994

Build a Mansard loft conversion - £51,994

Loft conversion - £33,690

Build a kitchen extension - £41,994

Hip to gable loft conversion - £41,994

Granny annexe - £86,994

Garden office - £9,994

Convert a Garage - £15,994

Garage - £18,494

Build a flat roof extension - £21,994

Build a dormer loft conversion - £41,994

Concrete foundations - £6,244

Convert a bungalow loft - £28,994

Convert a basement - £37,428