From £2,488
BRICK CONSTRUCTION is a trusted extension builder serving customers in GU20 and the surrounding area. Contact us to today to get a competitive quot...
From £2,136
BESPOKE BUILDING SOLUTIONS is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote and...
From £2,232
I have been remodelling and restyling homes for over 35 years ; creating amazing spaces to live and making people happy is my passion , my hobby an...
From £2,672
Kendall Construction is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote and compe...
From £2,632
JAMES BURKE GENERAL BUILDING is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote a...
From £2,488
Trusted and professional extension builder in GU20. Experienced in all extension buildering work and keeping within budget and on quote. Crown Desi...
From £2,600
HSL BUILDING SERVICES are here to help customers who need an Extension Builder in GU20. We offer a competitive rate to complete all your extension...
From £2,192
Stoke Park Developments Ltd is a trusted extension builder serving customers in GU20 and the surrounding area. Contact us to today to get a competi...
From £2,168
JORDAN CONSTRUCTION LTD are here to help customers who need an Extension Builder in GU20. We offer a competitive rate to complete all your extensio...
From £2,432
Our highly professional business is named after the incredible grandfather of our company’s founder, Zane. Ron Smale guided Zane into the constru...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in GU20 it ranges from £2,136 (BESPOKE BUILDING SOLUTIONS based in GU20) to £2,672 (Kendall Construction based in GU19).
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 GU20 by posting a job with HaMuch and we will send it to extension builders in GU20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ascot | £41 | £276 |
| Install An RSJ near Camberley | £41 | £283 |
| Install An RSJ near Bracknell | £41 | £286 |
| Install An RSJ near Bracknell Forest | £41 | £287 |
| Install An RSJ near Sandhurst | £41 | £283 |
| Install An RSJ near Woking | £43 | £277 |
| Install An RSJ near Egham | £42 | £266 |
| Install An RSJ near Farnborough | £41 | £273 |
| Install An RSJ near New Haw | £43 | £273 |
| Install An RSJ near Staines-upon-Thames | £42 | £269 |
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 - £17,704

Two storey extension - £88,306

Build a timber frame extension - £26,204

Build a swimming pool - £81,204

Single storey extension - £59,080

Side return extension - £43,795

Install an RSJ - £2,404

Outbuilding - £10,204

Build a Mansard loft conversion - £52,204

Loft conversion - £35,663

Build a kitchen extension - £42,204

Hip to gable loft conversion - £42,204

Granny annexe - £87,204

Garden office - £10,204

Convert a Garage - £16,204

Garage - £18,704

Build a flat roof extension - £22,204

Build a dormer loft conversion - £42,204

Concrete foundations - £6,454

Convert a bungalow loft - £29,204

Convert a basement - £39,795