From £2,624
Need an Extension Builder in Alnwick? K B Surveying has been helping local clients (20 mile radius) with their jobs for many years. Get a quote to...
From £2,544
Trusted and professional extension builder in Alnwick. Experienced in all work and keeping within budget and on quote. Smailes Construction Ltd ha...
From £1,504
We work from Tyne to Tweed. Friendly reliable trustworthy and quick. Free quotes and 1st class finish.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Alnwick it ranges from £1,504 (GIBSON BUILDERS & CONTR LTD based in NE71) to £2,624 (K B Surveying based in NE65).
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 Alnwick by posting a job with HaMuch and we will send it to extension builders in Alnwick.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ashington | £37 | £235 |
| Install An RSJ near Blyth | £36 | £242 |
| Install An RSJ near Cramlington | £31 | £221 |
| Install An RSJ near Whitley Bay | £33 | £227 |
| Install An RSJ near Longbenton | £29 | £204 |
| Install An RSJ near North Tyneside | £30 | £216 |
| Install An RSJ near Tynemouth | £30 | £219 |
| Install An RSJ near Wallsend | £30 | £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 - £17,524

Two storey extension - £88,036

Build a timber frame extension - £26,024

Build a swimming pool - £81,024

Single storey extension - £55,480

Side return extension - £41,770

Install an RSJ - £2,224

Outbuilding - £10,024

Build a Mansard loft conversion - £52,024

Loft conversion - £33,975

Build a kitchen extension - £42,024

Hip to gable loft conversion - £42,024

Granny annexe - £87,024

Garden office - £10,024

Convert a Garage - £16,024

Garage - £18,524

Build a flat roof extension - £22,024

Build a dormer loft conversion - £42,024

Concrete foundations - £6,274

Convert a bungalow loft - £29,024

Convert a basement - £37,770