From £2,440
Experienced extension builder ready to quote for your work. A & R BUILDING SERVICES is the best extension builder in BH18. No obligation free quote...
From £2,472
yas is a trusted extension builder serving customers in BH18 and the surrounding area. Contact us to today to get a competitive quote for extension...
From £1,992
M & J CONSTRUCTION is an established extension buildering business in BH18. We come highly recommended and provide competitive quotes for your work...
From £2,472
I am a stove, fireplace and chimney specialist offering a wide range of services from maintenance and annual chimney sweeping to the design, supply...
From £2,120
Hi my name is Robert, welcome and thank you for reviewing our company profile, you are already on the right path to finding a reputable an...
From £2,392
Relax... you have found a reliable extension builder in BH18. Amirez Developments is a friendly and reliable company based in BH18 who consider no ...
From £2,488
Need to find an Extension Builder near you for all your extension buildering work?
R & M Building & GroundWork Limited provides a local, tr...
From £1,992
AUTOGRAPH CONSTRUCTION LTD is a trusted extension builder serving customers in BH18 and the surrounding area. Contact us to today to get a competit...
From £1,784
Total Building Creations is an established and experienced local extension builder in BH18. Please contact us for a free, no obligation quote and ...
From £2,496
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BH18 it ranges from £1,784 (Total Building Creations based in BH21) to £2,496 (SOUTHGATE CONSTRUCTION LTD based in BH16).
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 - £17,565

Two storey extension - £88,097

Build a timber frame extension - £26,065

Build a swimming pool - £81,065

Single storey extension - £56,296

Side return extension - £42,229

Install an RSJ - £2,265

Outbuilding - £10,065

Build a Mansard loft conversion - £52,065

Loft conversion - £34,358

Build a kitchen extension - £42,065

Hip to gable loft conversion - £42,065

Granny annexe - £87,065

Garden office - £10,065

Convert a Garage - £16,065

Garage - £18,565

Build a flat roof extension - £22,065

Build a dormer loft conversion - £42,065

Concrete foundations - £6,315

Convert a bungalow loft - £29,065

Convert a basement - £38,229