Trusted and professional extension builder in Blyth. Experienced in all extension buildering work and keeping within budget and on quote. DGS Prope...
Arrowhead Construction is a trusted extension builder serving customers in Blyth and the surrounding area. Contact us to today to get a competitive...
Relax... you have found a reliable extension builder in Blyth. J3 BUILDING SOLUTIONS LTD is a friendly and reliable company based in Blyth who cons...
Relax... you have found a reliable extension builder in Blyth. Gdt builders is a friendly and reliable company based in Blyth who consider no job a...
From £3,080
Experienced extension builder ready to quote for your work. Premier Preservations Ltd is the best extension builder in Blyth. No obligation free qu...
From £2,352
Trusted and professional extension builder in Blyth. Experienced in all extension buildering work and keeping within budget and on quote. Green Aro...
From £2,352
We cover all of your building needs from house conversions, extensions, kitchens, bathrooms, room design, bespoke features and much more.Contact us...
From £2,344
North East Contractors Ltd are here to help customers who need an Extension Builder in Blyth. We offer a competitive rate to complete all your exte...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Blyth it ranges from £1,920 (J3 BUILDING SOLUTIONS LTD based in NE61) to £3,080 (Premier Preservations Ltd based in NE23).
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 Blyth by posting a job with HaMuch and we will send it to extension builders in Blyth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Blyth | £42 | £288 |
| Install An RSJ near Cramlington | £36 | £256 |
| Install An RSJ near Ashington | £44 | £280 |
| Install An RSJ near Whitley Bay | £38 | £268 |
| Install An RSJ near North Tyneside | £35 | £253 |
| Install An RSJ near Tynemouth | £36 | £257 |
| Install An RSJ near Longbenton | £34 | £234 |
| Install An RSJ near Wallsend | £34 | £245 |
| Install An RSJ near South Shields | £36 | £257 |
| Install An RSJ near Hebburn | £34 | £246 |
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 - £17,678

Two storey extension - £88,267

Build a timber frame extension - £26,178

Build a swimming pool - £81,178

Single storey extension - £58,560

Side return extension - £43,503

Install an RSJ - £2,378

Outbuilding - £10,178

Build a Mansard loft conversion - £52,178

Loft conversion - £35,419

Build a kitchen extension - £42,178

Hip to gable loft conversion - £42,178

Granny annexe - £87,178

Garden office - £10,178

Convert a Garage - £16,178

Garage - £18,678

Build a flat roof extension - £22,178

Build a dormer loft conversion - £42,178

Concrete foundations - £6,428

Convert a bungalow loft - £29,178

Convert a basement - £39,503