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Select your affordable Alton extension builder
Experienced extension builder ready to quote for your work. Trad Roofing is the best extension builder in Alton. No obligation free quotes and many...
From £2,384
RP Superstructures was formed in 2011 by principals Gerry Budd and Pat Sheehan following the successful build of Gerry’s own house, using his mul...
From £2,280
Alton, GU34
Need an Extension Builder in Alton? A & J Roofing (Haslemere) Ltd has been helping local clients (20 mile radius) with their extension buildering j...
From £2,104
Vaughan Design and Development is an established extension buildering business in Alton. We come highly recommended and provide competitive quotes ...
From £2,304
Need to find an Extension Builder near you for all your extension buildering work?
360 CONSTRUCTION SURREY LTD provides a local, trusted ex...
From £3,032
John Shea
Experienced extension builder ready to quote for your work. CANADA BUILDERS & ROOFING LTD is the best extension builder in Alton. No obligation fre...
From £2,176
Relax... you have found a reliable extension builder in Alton. Design & Construction Support Ltd is a friendly and reliable company based in Alton ...
From £2,448
REPAIR CRAFT CONSTRUCTION is a trusted extension builder serving customers in Alton and the surrounding area. Contact us to today to get a competit...
From £2,400
Relax... you have found a reliable extension builder in Alton. RP Superstructures is a friendly and reliable company based in Alton who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Alton it ranges from £2,104 (Vaughan Design and Development based in gu32) to £3,032 (CANADA BUILDERS & ROOFING LTD based in GU35).
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 Alton by posting a job with HaMuch and we will send it to extension builders in Alton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near East Hampshire | £38 | £258 |
| Install An RSJ near Basingstoke | £39 | £274 |
| Install An RSJ near Farnham | £41 | £276 |
| Install An RSJ near Fleet | £41 | £270 |
| Install An RSJ near Aldershot | £41 | £275 |
| Install An RSJ near Waverley | £68 | £313 |
| Install An RSJ near Basingstoke & Deane | £39 | £273 |
| Install An RSJ near Ash Vale | £41 | £277 |
| Install An RSJ near Farnborough | £41 | £272 |
| Install An RSJ near Winchester | £39 | £283 |
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 - £17,686

Two storey extension - £88,280

Build a timber frame extension - £26,186

Build a swimming pool - £81,186

Single storey extension - £58,728

Side return extension - £43,597

Install an RSJ - £2,386

Outbuilding - £10,186

Build a Mansard loft conversion - £52,186

Loft conversion - £35,498

Build a kitchen extension - £42,186

Hip to gable loft conversion - £42,186

Granny annexe - £87,186

Garden office - £10,186

Convert a Garage - £16,186

Garage - £18,686

Build a flat roof extension - £22,186

Build a dormer loft conversion - £42,186

Concrete foundations - £6,436

Convert a bungalow loft - £29,186

Convert a basement - £39,597