From £1,912
Trusted and professional extension builder in Ambleside. Experienced in all extension buildering work and keeping within budget and on quote. J R S...
From £1,776
Experienced extension builder ready to quote for your work. SIMPSON CONSTRUCTION is the best extension builder in Ambleside. No obligation free quo...
From £2,032
Relax... you have found a reliable extension builder in Ambleside. STEPHEN FELLER (BUILDER) is a friendly and reliable company based in Ambleside w...
From £2,584
Use our depth of knowledge in design, build, renovation and property development to realise your true one-off home.Our track record in residential ...
From £2,088
Need to find an Extension Builder near you for all your extension buildering work?
Absolute Build provides a local, trusted extension build...
From £2,056
Relax... you have found a reliable extension builder in Ambleside. CHRIS ELLWOOD BUILDING CONTR is a friendly and reliable company based in Amblesi...
From £2,104
Relax... you have found a reliable extension builder in Ambleside. Wolfe Design & Build is a friendly and reliable company based in Ambleside who c...
From £1,960
Experienced extension builder ready to quote for your work. Helmside Building Services is the best extension builder in Ambleside. No obligation fr...
From £1,592
Ian Groves is an established extension buildering business in Ambleside. We come highly recommended and provide competitive quotes for your work.
From £1,720
Relax... you have found a reliable extension builder in Ambleside. M & K BUILDERS KESWICK LIMITED is a friendly and reliable company based in Amble...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Ambleside it ranges from £1,592 (Ian Groves based in CA12) to £2,584 (ROJ.house based in LA9).
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 Ambleside by posting a job with HaMuch and we will send it to extension builders in Ambleside.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Kendal | £28 | £236 |
| Install An RSJ near Barrow-in-Furness | £25 | £204 |
| Install An RSJ near Morecambe | £25 | £212 |
| Install An RSJ near Whitehaven | £22 | £221 |
| Install An RSJ near Lancaster | £25 | £211 |
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 - £17,282

Two storey extension - £87,674

Build a timber frame extension - £25,782

Build a swimming pool - £80,782

Single storey extension - £50,648

Side return extension - £39,052

Install an RSJ - £1,982

Outbuilding - £9,782

Build a Mansard loft conversion - £51,782

Loft conversion - £31,710

Build a kitchen extension - £41,782

Hip to gable loft conversion - £41,782

Granny annexe - £86,782

Garden office - £9,782

Convert a Garage - £15,782

Garage - £18,282

Build a flat roof extension - £21,782

Build a dormer loft conversion - £41,782

Concrete foundations - £6,032

Convert a bungalow loft - £28,782

Convert a basement - £35,052