From £1,960
M B Brickwork is an established extension buildering business in PO6. We come highly recommended and provide competitive quotes for your work.
...From £2,328
Relax... you have found a reliable extension builder in PO6. SLG Mills Building Services is a friendly and reliable company based in PO6 who consid...
From £2,304
As a family owned limited company of over 40 years, our focus on quality and service has seen our business thrive and grow, solely through recommen...
From £1,928
Experienced extension builder ready to quote for your work. A G Builders is the best extension builder in PO6. No obligation free quotes and many h...
From £2,200
Build Light Group is an established and experienced local extension builder in PO6. Please contact us for a free, no obligation quote and competiti...
From £2,184
Sigma Probuild Ltd is an established extension buildering business in PO6. We come highly recommended and provide competitive quotes for your work....
From £2,024
Relax... you have found a reliable extension builder in PO6. Bribern Property Services is a friendly and reliable company based in PO6 who consider...
From £1,984
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,000
Need to find an Extension Builder near you for all your extension buildering work?
DC Roofing & Sons Ltd provides a local, trusted extensio...
From £1,912
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 PO6 it ranges from £1,912 (Westcott Construction Ltd based in PO3) to £2,328 (SLG Mills Building Services based in PO7).
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 PO6 by posting a job with HaMuch and we will send it to extension builders in PO6.
"RSJ installation" - PO2, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Portsmouth | £36 | £250 |
| Install An RSJ near Waterlooville | £36 | £250 |
| Install An RSJ near Havant & Waterloo | £35 | £248 |
| Install An RSJ near Havant | £35 | £249 |
| Install An RSJ near Gosport | £35 | £246 |
| Install An RSJ near Horndean | £35 | £253 |
| Install An RSJ near Fareham | £35 | £250 |
| Install An RSJ near Lee-on-the-Solent | £35 | £249 |
| Install An RSJ near Locks Heath | £33 | £240 |
| Install An RSJ near Hedge End | £34 | £244 |
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 - £17,382

Two storey extension - £87,824

Build a timber frame extension - £25,882

Build a swimming pool - £80,882

Single storey extension - £52,648

Side return extension - £40,177

Install an RSJ - £2,082

Outbuilding - £9,882

Build a Mansard loft conversion - £51,882

Loft conversion - £32,648

Build a kitchen extension - £41,882

Hip to gable loft conversion - £41,882

Granny annexe - £86,882

Garden office - £9,882

Convert a Garage - £15,882

Garage - £18,382

Build a flat roof extension - £21,882

Build a dormer loft conversion - £41,882

Concrete foundations - £6,132

Convert a bungalow loft - £28,882

Convert a basement - £36,177