Chris Bond
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
Gerry
Need to find an Extension Builder near you for all your extension buildering work?
Main Construction provides a local, trusted extension bu...
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in BN17 and the surrounding areas. ...
Need an Extension Builder in BN17? MPS Home Improvements Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...
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...
R S Construction (Surrey) is an established extension buildering business in BN17. We come highly recommended and provide competitive quotes for yo...
Futureways Design and Build are here to help customers who need an Extension Builder in BN17. We offer a competitive rate to complete all your exte...
Park Building Services Ltd is a trusted extension builder serving customers in BN17 and the surrounding area. Contact us to today to get a competit...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Giles Dixon is an experienced Project Manager with over 30 years experience, having worked from the ground up starting in 1984 as an apprentice ele...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BN17 it ranges from £1,952 (Park Building Services Ltd based in PO9) to £3,296 (R&B Property Improvements based in PO9).
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 BN17 by posting a job with HaMuch and we will send it to extension builders in BN17.
"RSJ installation 5.2 mx 300 wide to kitchen extension in Littlehampton" - LITTLEHAMPTON, job posted 09/01/25
"RSJ installation" - BN17, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Littlehampton | £35 | £244 |
| Install An RSJ near Rustington | £36 | £246 |
| Install An RSJ near Arun | £35 | £241 |
| Install An RSJ near Bognor Regis | £35 | £247 |
| Install An RSJ near Worthing | £35 | £251 |
| Install An RSJ near Lancing | £37 | £251 |
| Install An RSJ near Chichester | £34 | £242 |
| Install An RSJ near Shoreham-by-Sea | £36 | £250 |
| Install An RSJ near Brighton | £35 | £251 |
| Install An RSJ near Brighton and Hove | £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 - £17,702

Two storey extension - £88,302

Build a timber frame extension - £26,202

Build a swimming pool - £81,202

Single storey extension - £59,032

Side return extension - £43,768

Install an RSJ - £2,402

Outbuilding - £10,202

Build a Mansard loft conversion - £52,202

Loft conversion - £35,640

Build a kitchen extension - £42,202

Hip to gable loft conversion - £42,202

Granny annexe - £87,202

Garden office - £10,202

Convert a Garage - £16,202

Garage - £18,702

Build a flat roof extension - £22,202

Build a dormer loft conversion - £42,202

Concrete foundations - £6,452

Convert a bungalow loft - £29,202

Convert a basement - £39,768