From £2,056
BEACON BUILDERS are here to help customers who need an Extension Builder in WS1. We offer a competitive rate to complete all your extension builder...
From £1,960
RM Builders is an established and experienced local extension builder in WS1. Please contact us for a free, no obligation quote and competitive rat...
From £2,136
Zygi&Bob Builders is an established extension buildering business in WS1. We come highly recommended and provide competitive quotes for your work.<...
From £2,184
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,072
SBS BUILDING & MAINTENANCE LTD is an established extension buildering business in WS1. We come highly recommended and provide competitive quotes fo...
From £2,040
Need to find an Extension Builder near you for all your extension buildering work?
Willbuild provides a local, trusted extension buildering...
From £1,496
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,184
Need to find an Extension Builder near you for all your extension buildering work?
B S Builders provides a local, trusted extension builder...
From £2,032
A.S. BUILDING is a trusted extension builder serving customers in WS1 and the surrounding area. Contact us to today to get a competitive quote for ...
From £3,200
Trusted and professional extension builder in WS1. Experienced in all extension buildering work and keeping within budget and on quote. TG Building...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in WS1 it ranges from £1,496 (Saxonworld Ltd based in WS9) to £3,200 (TG Building Services & Son based in B71).
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 WS1 by posting a job with HaMuch and we will send it to extension builders in WS1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Walsall | £25 | £195 |
| Install An RSJ near Wednesbury | £25 | £194 |
| Install An RSJ near Darlaston | £25 | £194 |
| Install An RSJ near Bloxwich | £25 | £195 |
| Install An RSJ near Sandwell | £25 | £196 |
| Install An RSJ near Willenhall | £25 | £195 |
| Install An RSJ near West Bromwich | £25 | £195 |
| Install An RSJ near Bilston | £25 | £195 |
| Install An RSJ near Tipton | £25 | £196 |
| Install An RSJ near Brownhills | £25 | £193 |
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 - £17,436

Two storey extension - £87,904

Build a timber frame extension - £25,936

Build a swimming pool - £80,936

Single storey extension - £53,720

Side return extension - £40,780

Install an RSJ - £2,136

Outbuilding - £9,936

Build a Mansard loft conversion - £51,936

Loft conversion - £33,150

Build a kitchen extension - £41,936

Hip to gable loft conversion - £41,936

Granny annexe - £86,936

Garden office - £9,936

Convert a Garage - £15,936

Garage - £18,436

Build a flat roof extension - £21,936

Build a dormer loft conversion - £41,936

Concrete foundations - £6,186

Convert a bungalow loft - £28,936

Convert a basement - £36,780