From £2,136
Extensions, Refurbishments & Loft ConversionsAt Keystone our mission is to help our clients imagine, design & build environments that enhance their...
From £2,008
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,312
Experienced extension builder ready to quote for your work. MRA CONSTRUCTION is the best extension builder in RH16. No obligation free quotes and m...
From £2,208
Need to find an Extension Builder near you for all your extension buildering work?
Tj's Fencing provides a local, trusted extension builder...
From £2,800
Rjscarpentryconstruction is a well established company with over 30 years of experience in the carpentry and construction industries
From £2,048
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,560
TOLLEY CARPENTRY is an established extension buildering business in RH16. We come highly recommended and provide competitive quotes for your work.<...
From £2,264
JG Brickwork Services Limited is an established extension buildering business in RH16. We come highly recommended and provide competitive quotes fo...
From £1,936
Relax... you have found a reliable extension builder in RH16. Atlas Installations is a friendly and reliable company based in RH16 who consider no ...
From £1,984
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in RH16 it ranges from £1,936 (Atlas Installations based in RH15) to £2,800 (RJ's Carpentry Construction based in RH15).
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 RH16 by posting a job with HaMuch and we will send it to extension builders in RH16.
"RSJ installation" - HAYWARDS HEATH, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Haywards Heath | £35 | £256 |
| Install An RSJ near Mid Sussex | £35 | £261 |
| Install An RSJ near Burgess Hill | £36 | £240 |
| Install An RSJ near Crawley | £38 | £255 |
| Install An RSJ near East Grinstead | £37 | £259 |
| Install An RSJ near Horsham | £38 | £265 |
| Install An RSJ near Brighton and Hove | £35 | £251 |
| Install An RSJ near Horley | £38 | £258 |
| Install An RSJ near Crowborough | £36 | £258 |
| Install An RSJ near Brighton | £35 | £251 |
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 - £17,526

Two storey extension - £88,038

Build a timber frame extension - £26,026

Build a swimming pool - £81,026

Single storey extension - £55,512

Side return extension - £41,788

Install an RSJ - £2,226

Outbuilding - £10,026

Build a Mansard loft conversion - £52,026

Loft conversion - £33,990

Build a kitchen extension - £42,026

Hip to gable loft conversion - £42,026

Granny annexe - £87,026

Garden office - £10,026

Convert a Garage - £16,026

Garage - £18,526

Build a flat roof extension - £22,026

Build a dormer loft conversion - £42,026

Concrete foundations - £6,276

Convert a bungalow loft - £29,026

Convert a basement - £37,788