Steve Harris
Hi my name is Steve harris of hb builders we are based in portchester and have over 40 years of experience in the building trade we would be mor...
Nick Smith
NICK SMITH BUILDERS is an established extension buildering business in PO17. We come highly recommended and provide competitive quotes for your wor...
Thermic Homes is an energy-saving home improvement company operating out of the south coast of England. Our mission is to create warmer homes for t...
From £2,384
Stubbington Roofing Ltd. is an established extension buildering business in PO17. We come highly recommended and provide competitive quotes for you...
From £2,240
Wayne Roxburgh
Been in the trade for over 30 yrs and take pride in my work. Fully insured and references both trade and private available
From £2,600
Mike Cripps
Cripps property services has 18 years experience in the construction industry and specializes in many different categories from bathrooms, heating,...
From £2,184
Trusted and professional extension builder in PO17. Experienced in all extension buildering work and keeping within budget and on quote. DAVE HARRI...
From £2,280
Need an Extension Builder in PO17? WINSOR CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for man...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in PO17 it ranges from £1,936 (H B Builders based in PO16) to £2,600 (Cripps Property Services based in PO16).
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 PO17 by posting a job with HaMuch and we will send it to extension builders in PO17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Fareham | £35 | £250 |
| Install An RSJ near Locks Heath | £33 | £240 |
| Install An RSJ near Portsmouth | £36 | £250 |
| Install An RSJ near Waterlooville | £36 | £250 |
| Install An RSJ near Lee-on-the-Solent | £35 | £249 |
| Install An RSJ near Hedge End | £34 | £244 |
| Install An RSJ near Gosport | £35 | £246 |
| Install An RSJ near Horndean | £36 | £254 |
| Install An RSJ near Havant | £35 | £249 |
| Install An RSJ near Havant & Waterloo | £35 | £248 |
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 - £17,564

Two storey extension - £88,096

Build a timber frame extension - £26,064

Build a swimming pool - £81,064

Single storey extension - £56,280

Side return extension - £42,220

Install an RSJ - £2,264

Outbuilding - £10,064

Build a Mansard loft conversion - £52,064

Loft conversion - £34,350

Build a kitchen extension - £42,064

Hip to gable loft conversion - £42,064

Granny annexe - £87,064

Garden office - £10,064

Convert a Garage - £16,064

Garage - £18,564

Build a flat roof extension - £22,064

Build a dormer loft conversion - £42,064

Concrete foundations - £6,314

Convert a bungalow loft - £29,064

Convert a basement - £38,220