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Ferguson Building Services Limited is an established and experienced local extension builder in Steyning. Please contact us for a free, no obligati...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Steyning. Experienced in all extension buildering work and keeping within budget and on quote. Stretc...
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...
From £2,192
Member since August 2026
H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...
Proper Copper DesignWe are a design lead copper homeware company specializing in contemporary handles, taps, showers and accessories. Our products ...
Trusted and professional extension builder in Steyning. Experienced in all extension buildering work and keeping within budget and on quote. Good C...
ACF Carpentry Ltd is an established and experienced local extension builder in Steyning. Please contact us for a free, no obligation quote and comp...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Steyning. Experienced in all extension buildering work and keeping within budget and on quote. BRICKT...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Steyning it ranges from £2,080 (Stretch My Home Ltd based in BN12) to £2,496 (Proper Copper Design based in BN3).
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 Steyning by posting a job with HaMuch and we will send it to extension builders in Steyning.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Lancing | £36 | £249 |
| Install An RSJ near Shoreham-by-Sea | £36 | £250 |
| Install An RSJ near Worthing | £35 | £249 |
| Install An RSJ near Rustington | £35 | £242 |
| Install An RSJ near Brighton | £35 | £253 |
| Install An RSJ near Brighton and Hove | £35 | £252 |
| Install An RSJ near Burgess Hill | £36 | £256 |
| Install An RSJ near Littlehampton | £35 | £241 |
| Install An RSJ near Horsham | £38 | £265 |
| Install An RSJ near Arun | £35 | £241 |
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 - £17,551

Two storey extension - £88,077

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,024

Side return extension - £42,076

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,230

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,076