Experienced extension builder ready to quote for your work. A South View is the best extension builder in Slough. No obligation free quotes and man...
MRE Maintenance Services is an established and experienced local extension builder in Slough. Please contact us for a free, no obligation quote and...
Slough, SL1
BeautifulRenovation are here to help customers who need an Extension Builder in Slough. We offer a competitive rate to complete all your extension ...
Experienced extension builder ready to quote for your work. Sherry Construction is the best extension builder in Slough. No obligation free quotes ...
EIC Builders Ltd are here to help customers who need an Extension Builder in Slough. We offer a competitive rate to complete all your extension bui...
BDR Home Improvement are here to help customers who need an Extension Builder in Slough. We offer a competitive rate to complete all your extension...
Dub Solutions is a trusted extension builder serving customers in Slough and the surrounding area. Contact us to today to get a competitive quote f...
Lee Townsend
Need to find an Extension Builder near you for all your extension buildering work?
Lp Townsend Brickwork provides a local, trusted extensio...
B.A Ruffle Building Contractor is an established extension buildering business in Slough. We come highly recommended and provide competitive quotes...
HAMPTON CONSTRUCTION LTD are here to help customers who need an Extension Builder in Slough. We offer a competitive rate to complete all your exten...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Slough it ranges from £1,880 (Lp Townsend Brickwork based in SL2) to £2,584 (HAMPTON CONSTRUCTION LTD based in SL2).
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 Slough by posting a job with HaMuch and we will send it to extension builders in Slough.
"RSJ installation" - SLOUGH, job posted 05/07/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Slough | £42 | £272 |
| Install An RSJ near Windsor & Maidenhead | £42 | £272 |
| Install An RSJ near Windsor | £41 | £271 |
| Install An RSJ near Maidenhead | £41 | £273 |
| Install An RSJ near Egham | £42 | £266 |
| Install An RSJ near Gerrards Cross | £43 | £282 |
| Install An RSJ near Staines-upon-Thames | £42 | £269 |
| Install An RSJ near Hillingdon | £63 | £276 |
| Install An RSJ near Ascot | £41 | £276 |
| Install An RSJ near Bracknell Forest | £41 | £287 |
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 - £17,561

Two storey extension - £88,091

Build a timber frame extension - £26,061

Build a swimming pool - £81,061

Single storey extension - £56,216

Side return extension - £42,184

Install an RSJ - £2,261

Outbuilding - £10,061

Build a Mansard loft conversion - £52,061

Loft conversion - £34,320

Build a kitchen extension - £42,061

Hip to gable loft conversion - £42,061

Granny annexe - £87,061

Garden office - £10,061

Convert a Garage - £16,061

Garage - £18,561

Build a flat roof extension - £22,061

Build a dormer loft conversion - £42,061

Concrete foundations - £6,311

Convert a bungalow loft - £29,061

Convert a basement - £38,184