From £2,080
Relax... you have found a reliable extension builder in BS37. A M I Construction is a friendly and reliable company based in BS37 who consider no j...
From £1,920
Relax... you have found a reliable extension builder in BS37. J SUTTON CONSTRUCTION is a friendly and reliable company based in BS37 who consider n...
From £2,144
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,056
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,496
N J Laity & Son & Grandson's are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your ext...
From £2,040
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your exte...
From £1,928
Neil Causon & Son is an established and experienced local extension builder in BS37. Please contact us for a free, no obligation quote and competit...
From £2,024
Need an Extension Builder in BS37? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £2,744
GARY G BOND LIMITED are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your extension bu...
From £2,120
Relax... you have found a reliable extension builder in BS37. RD Pope Construction is a friendly and reliable company based in BS37 who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BS37 it ranges from £1,920 (J SUTTON CONSTRUCTION based in GL5) to £2,744 (GARY G BOND LIMITED based in BS16).
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 BS37 by posting a job with HaMuch and we will send it to extension builders in BS37.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Yate | £34 | £263 |
| Install An RSJ near South Gloucestershire | £34 | £260 |
| Install An RSJ near Bradley Stoke | £34 | £259 |
| Install An RSJ near Kingswood | £34 | £257 |
| Install An RSJ near Bristol | £33 | £255 |
| Install An RSJ near Keynsham | £33 | £251 |
| Install An RSJ near Clifton | £33 | £255 |
| Install An RSJ near Chippenham | £34 | £258 |
| Install An RSJ near Portishead | £33 | £247 |
| Install An RSJ near Bath | £32 | £249 |
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 - £17,455

Two storey extension - £87,933

Build a timber frame extension - £25,955

Build a swimming pool - £80,955

Single storey extension - £54,104

Side return extension - £40,996

Install an RSJ - £2,155

Outbuilding - £9,955

Build a Mansard loft conversion - £51,955

Loft conversion - £33,330

Build a kitchen extension - £41,955

Hip to gable loft conversion - £41,955

Granny annexe - £86,955

Garden office - £9,955

Convert a Garage - £15,955

Garage - £18,455

Build a flat roof extension - £21,955

Build a dormer loft conversion - £41,955

Concrete foundations - £6,205

Convert a bungalow loft - £28,955

Convert a basement - £36,996