From £2,048
Trusted and professional extension builder in PO8. Experienced in all extension buildering work and keeping within budget and on quote. Richard Tho...
From £1,952
we're Specialists in the following
•roofing
•brickwork
•Repointing
...From £1,968
TP Developments are here to help customers who need an Extension Builder in PO8. We offer a competitive rate to complete all your extension builder...
From £2,000
Relax... you have found a reliable extension builder in PO8. C M BENNETT CONSTRUCTION LTD is a friendly and reliable company based in PO8 who consi...
From £1,384
Need to find an Extension Builder near you for all your extension buildering work?
M G Home Improvements provides a local, trusted extensio...
From £1,960
Maw Carpentry Services are here to help customers who need an Extension Builder in PO8. We offer a competitive rate to complete all your extension ...
From £2,264
Relax... you have found a reliable extension builder in PO8. CLARKE BUILDING SERVICES is a friendly and reliable company based in PO8 who consider ...
From £2,216
NDR BUILDING SERVICES LTD is an established extension buildering business in PO8. We come highly recommended and provide competitive quotes for you...
From £1,928
Mark Creese is an established and experienced local extension builder in PO8. Please contact us for a free, no obligation quote and competitive rat...
From £2,512
Relax... you have found a reliable extension builder in PO8. MC Architectural Design is a friendly and reliable company based in PO8 who consider n...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in PO8 it ranges from £1,384 (M G Home Improvements based in PO8) to £2,512 (MC Architectural Design 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 PO8 by posting a job with HaMuch and we will send it to extension builders in PO8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Horndean | £35 | £253 |
| Install An RSJ near Waterlooville | £36 | £250 |
| Install An RSJ near Havant | £35 | £249 |
| Install An RSJ near Havant & Waterloo | £35 | £248 |
| Install An RSJ near Portsmouth | £36 | £250 |
| Install An RSJ near Fareham | £35 | £250 |
| Install An RSJ near Gosport | £35 | £246 |
| Install An RSJ near East Hampshire | £38 | £258 |
| Install An RSJ near Lee-on-the-Solent | £35 | £249 |
| Install An RSJ near Chichester | £34 | £242 |
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 - £17,323

Two storey extension - £87,735

Build a timber frame extension - £25,823

Build a swimming pool - £80,823

Single storey extension - £51,464

Side return extension - £39,511

Install an RSJ - £2,023

Outbuilding - £9,823

Build a Mansard loft conversion - £51,823

Loft conversion - £32,093

Build a kitchen extension - £41,823

Hip to gable loft conversion - £41,823

Granny annexe - £86,823

Garden office - £9,823

Convert a Garage - £15,823

Garage - £18,323

Build a flat roof extension - £21,823

Build a dormer loft conversion - £41,823

Concrete foundations - £6,073

Convert a bungalow loft - £28,823

Convert a basement - £35,511