From £1,752
Marhsall is an established extension buildering business in DN17. We come highly recommended and provide competitive quotes for your work.
From £1,808
Experienced extension builder ready to quote for your work. City Builders is the best extension builder in DN17. No obligation free quotes and many...
From £1,904
Need to find an Extension Builder near you for all your extension buildering work?
HEPWORTH BUILDING provides a local, trusted extension bu...
From £1,888
Lace Construction Ltd are here to help customers who need an Extension Builder in DN17. We offer a competitive rate to complete all your extension ...
From £1,808
RB Building Services is an established extension buildering business in DN17. We come highly recommended and provide competitive quotes for your wo...
From £1,944
Trusted and professional extension builder in DN17. Experienced in all extension buildering work and keeping within budget and on quote. MERCER PAR...
From £1,864
1980 are here to help customers who need an Extension Builder in DN17. We offer a competitive rate to complete all your extension buildering jobs t...
From £2,008
Relax... you have found a reliable extension builder in DN17. LFC Builders is a friendly and reliable company based in DN17 who consider no job as ...
From £2,216
ABBS Building & Plastics are here to help customers who need an Extension Builder in DN17. We offer a competitive rate to complete all your extensi...
From £1,840
Relax... you have found a reliable extension builder in DN17. Gosling Builders is a friendly and reliable company based in DN17 who consider no job...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DN17 it ranges from £1,752 (Marhsall based in HU15) to £2,216 (ABBS Building & Plastics based in DN14).
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 DN17 by posting a job with HaMuch and we will send it to extension builders in DN17.
"RSJ installation to support a chimney which has been removed" - DN16, job posted 04/12/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Scunthorpe | £26 | £207 |
| Install An RSJ near North Lincolnshire | £28 | £216 |
| Install An RSJ near Gainsborough | £30 | £234 |
| Install An RSJ near Goole | £26 | £217 |
| Install An RSJ near Willerby | £29 | £221 |
| Install An RSJ near Doncaster | £29 | £238 |
| Install An RSJ near Bassetlaw | £31 | £243 |
| Install An RSJ near Hull | £29 | £223 |
| Install An RSJ near Retford | £31 | £243 |
| Install An RSJ near Selby | £30 | £240 |
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 - £17,203

Two storey extension - £87,555

Build a timber frame extension - £25,703

Build a swimming pool - £80,703

Single storey extension - £49,064

Side return extension - £38,161

Install an RSJ - £1,903

Outbuilding - £9,703

Build a Mansard loft conversion - £51,703

Loft conversion - £30,968

Build a kitchen extension - £41,703

Hip to gable loft conversion - £41,703

Granny annexe - £86,703

Garden office - £9,703

Convert a Garage - £15,703

Garage - £18,203

Build a flat roof extension - £21,703

Build a dormer loft conversion - £41,703

Concrete foundations - £5,953

Convert a bungalow loft - £28,703

Convert a basement - £34,161