From £1,992
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,176
Southbourne, BH6
Experienced extension builder ready to quote for your work. PINECLIFFE CONSTRUCTION LTD is the best extension builder in Southbourne. No obligation...
From £2,416
Need an Extension Builder in Southbourne? Upscale Home Improvements has been helping local clients (20 mile radius) with their extension buildering...
From £2,168
pantlin construction ltd are here to help customers who need an Extension Builder in Southbourne. We offer a competitive rate to complete all your ...
From £2,176
Our building services company Colin Sloper General Builder has twenty five years’ experience and have been helping customers in Dorset and the su...
From £2,360
A design and build service for commercial or residential properties. House of Tigerhorse is the design arm of Broad Construction which together of...
From £2,168
Trusted and professional extension builder in Southbourne. Experienced in all extension buildering work and keeping within budget and on quote. B.H...
From £2,040
Relax... you have found a reliable extension builder in Southbourne. First Alpha Home Improvements Ltd is a friendly and reliable company based in ...
From £2,424
Elmer Building Services ltd is an established extension buildering business in Southbourne. We come highly recommended and provide competitive quot...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Southbourne it ranges from £1,992 (J F DEWHIRST & CO based in BH6) to £2,704 (Zeneli Builders based in BH23).
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 Southbourne by posting a job with HaMuch and we will send it to extension builders in Southbourne.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Christchurch | £36 | £251 |
| Install An RSJ near Bournemouth | £38 | £257 |
| Install An RSJ near Poole | £38 | £250 |
| Install An RSJ near New Forest | £32 | £245 |
| Install An RSJ near Totton | £34 | £243 |
| Install An RSJ near Southampton | £34 | £243 |
| Install An RSJ near Isle of Wight | £34 | £246 |
| Install An RSJ near Romsey | £32 | £230 |
| Install An RSJ near Salisbury | £35 | £247 |
| Install An RSJ near Locks Heath | £33 | £240 |
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 - £17,562

Two storey extension - £88,094

Build a timber frame extension - £26,062

Build a swimming pool - £81,062

Single storey extension - £56,248

Side return extension - £42,202

Install an RSJ - £2,262

Outbuilding - £10,062

Build a Mansard loft conversion - £52,062

Loft conversion - £34,335

Build a kitchen extension - £42,062

Hip to gable loft conversion - £42,062

Granny annexe - £87,062

Garden office - £10,062

Convert a Garage - £16,062

Garage - £18,562

Build a flat roof extension - £22,062

Build a dormer loft conversion - £42,062

Concrete foundations - £6,312

Convert a bungalow loft - £29,062

Convert a basement - £38,202