From £2,512
Relax... you have found a reliable extension builder in PO7. MC Architectural Design is a friendly and reliable company based in PO7 who consider n...
From £1,960
Maw Carpentry Services are here to help customers who need an Extension Builder in PO7. We offer a competitive rate to complete all your extension ...
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 £1,952
we're Specialists in the following
•roofing
•brickwork
•Repointing
...From £2,328
Relax... you have found a reliable extension builder in PO7. SLG Mills Building Services is a friendly and reliable company based in PO7 who consid...
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 £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 £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 £2,064
Need an Extension Builder in PO7? CONSTRACT CONSTRUCTION SRVS LT has been helping local clients (20 mile radius) with their extension buildering jo...
From £1,024
Fifty years experience. Multi-trades, Electrical (C&G), Plumbing, Small building works, Maintenance & repair etc. NICEIC, ECA, Guild Master Cra...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in PO7 it ranges from £1,024 (Jones Facilities & Maintenance Services based in PO6) 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 PO7 by posting a job with HaMuch and we will send it to extension builders in PO7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Waterlooville | £31 | £213 |
| Install An RSJ near Horndean | £30 | £213 |
| Install An RSJ near Havant | £30 | £213 |
| Install An RSJ near Havant & Waterloo | £30 | £213 |
| Install An RSJ near Portsmouth | £31 | £216 |
| Install An RSJ near Fareham | £31 | £217 |
| Install An RSJ near Gosport | £30 | £215 |
| Install An RSJ near Lee-on-the-Solent | £31 | £217 |
| Install An RSJ near Locks Heath | £30 | £213 |
| Install An RSJ near Chichester | £31 | £216 |
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 - £17,433

Two storey extension - £87,899

Build a timber frame extension - £25,933

Build a swimming pool - £80,933

Single storey extension - £53,656

Side return extension - £40,744

Install an RSJ - £2,133

Outbuilding - £9,933

Build a Mansard loft conversion - £51,933

Loft conversion - £33,120

Build a kitchen extension - £41,933

Hip to gable loft conversion - £41,933

Granny annexe - £86,933

Garden office - £9,933

Convert a Garage - £15,933

Garage - £18,433

Build a flat roof extension - £21,933

Build a dormer loft conversion - £41,933

Concrete foundations - £6,183

Convert a bungalow loft - £28,933

Convert a basement - £36,744