From £3,296
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.
From £2,104
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,064
Need an Extension Builder in PO9? CONSTRACT CONSTRUCTION SRVS LT has been helping local clients (20 mile radius) with their extension buildering jo...
From £3,704
Need to find an Extension Builder near you for all your extension buildering work?
KC Fencing Ltd provides a local, trusted extension buil...
From £2,168
Solent Home Improvements are here to help customers who need an Extension Builder in PO9. We offer a competitive rate to complete all your extensio...
From £2,312
Solent Home Improvements are here to help customers who need an Extension Builder in PO9. We offer a competitive rate to complete all your extensio...
From £1,952
Park Building Services Ltd is a trusted extension builder serving customers in PO9 and the surrounding area. Contact us to today to get a competiti...
From £2,096
With over 40 years of experience ARC Property Maintenance & Home Improvements Ltd has been providing a full range of structural repairs and buildin...
From £2,120
Need an Extension Builder in PO9? Aspen Garden Rooms has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £2,224
Relax... you have found a reliable extension builder in PO9. SYNERGY Home Renovations is a friendly and reliable company based in PO9 who consider ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in PO9 it ranges from £1,952 (Park Building Services Ltd based in PO9) to £3,704 (KC Fencing Ltd 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 PO9 by posting a job with HaMuch and we will send it to extension builders in PO9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Havant | £35 | £249 |
| Install An RSJ near Havant & Waterloo | £35 | £248 |
| Install An RSJ near Waterlooville | £36 | £250 |
| Install An RSJ near Horndean | £35 | £253 |
| Install An RSJ near Portsmouth | £36 | £250 |
| Install An RSJ near Gosport | £35 | £246 |
| Install An RSJ near Fareham | £35 | £250 |
| Install An RSJ near Chichester | £34 | £242 |
| Install An RSJ near Lee-on-the-Solent | £35 | £249 |
| Install An RSJ near East Hampshire | £38 | £258 |
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