From £1,984
Swanage, BH19
SWANAGE BUILDING SERVICES is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a compet...
From £2,024
Experienced extension builder ready to quote for your work. ARNOLD SNELL BUILDING LTD is the best extension builder in Swanage. No obligation free ...
From £2,784
Need an Extension Builder in Swanage? RNTP ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £2,216
K CONSTRUCTION T/A is an established and experienced local extension builder in Swanage. Please contact us for a free, no obligation quote and comp...
From £2,488
Experienced extension builder ready to quote for your work. Portus Homes is the best extension builder in Swanage. No obligation free quotes and ma...
From £2,208
DJ HALE BUILDING CONTRACTORS is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a com...
From £2,016
Urban Projects are here to help customers who need an Extension Builder in Swanage. We offer a competitive rate to complete all your extension buil...
From £2,320
Ground Up Building Services Ltd is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a ...
From £1,400
MARLEY TRained roofer, reliable ,flat roofs , slating and tiling,fascias and gutters. All repairs, no job too small
From £2,264
Need an Extension Builder in Swanage? D&B Build has been helping local clients (20 mile radius) with their extension buildering jobs for many years...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Swanage 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 Swanage by posting a job with HaMuch and we will send it to extension builders in Swanage.
| 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 Dorchester | £30 | £230 |
| Install An RSJ near Weymouth | £33 | £260 |
| Install An RSJ near New Forest | £32 | £245 |
| Install An RSJ near Totton | £34 | £243 |
| Install An RSJ near Isle of Wight | £34 | £246 |
| Install An RSJ near Southampton | £34 | £243 |
| Install An RSJ near Romsey | £32 | £230 |
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 - £17,470

Two storey extension - £87,956

Build a timber frame extension - £25,970

Build a swimming pool - £80,970

Single storey extension - £54,408

Side return extension - £41,167

Install an RSJ - £2,170

Outbuilding - £9,970

Build a Mansard loft conversion - £51,970

Loft conversion - £33,473

Build a kitchen extension - £41,970

Hip to gable loft conversion - £41,970

Granny annexe - £86,970

Garden office - £9,970

Convert a Garage - £15,970

Garage - £18,470

Build a flat roof extension - £21,970

Build a dormer loft conversion - £41,970

Concrete foundations - £6,220

Convert a bungalow loft - £28,970

Convert a basement - £37,167