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...
ACF Carpentry Ltd is an established and experienced local extension builder in BN43. Please contact us for a free, no obligation quote and competit...
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...
KEN BUILDING is an established extension buildering business in BN43. We come highly recommended and provide competitive quotes for your work.
...K. BRAND BUILDING LIMITED are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all your extens...
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 BN43. Experienced in all extension buildering work and keeping within budget and on quote. BRICKTEC B...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,136
Adrian Harris Garden Design And Build are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all...
From £2,360
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BN43 it ranges from £2,080 (KEN BUILDING based in BN3) 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 BN43 by posting a job with HaMuch and we will send it to extension builders in BN43.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Shoreham-by-Sea | £36 | £250 |
| Install An RSJ near Lancing | £36 | £249 |
| Install An RSJ near Worthing | £35 | £249 |
| Install An RSJ near Brighton | £35 | £251 |
| Install An RSJ near Brighton and Hove | £35 | £251 |
| Install An RSJ near Rustington | £35 | £242 |
| Install An RSJ near Burgess Hill | £36 | £240 |
| Install An RSJ near Littlehampton | £35 | £241 |
| Install An RSJ near Arun | £35 | £241 |
| Install An RSJ near Haywards Heath | £35 | £256 |
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 - £17,521

Two storey extension - £88,031

Build a timber frame extension - £26,021

Build a swimming pool - £81,021

Single storey extension - £55,416

Side return extension - £41,734

Install an RSJ - £2,221

Outbuilding - £10,021

Build a Mansard loft conversion - £52,021

Loft conversion - £33,945

Build a kitchen extension - £42,021

Hip to gable loft conversion - £42,021

Granny annexe - £87,021

Garden office - £10,021

Convert a Garage - £16,021

Garage - £18,521

Build a flat roof extension - £22,021

Build a dormer loft conversion - £42,021

Concrete foundations - £6,271

Convert a bungalow loft - £29,021

Convert a basement - £37,734