From £3,112
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
From £1,728
Experienced extension builder ready to quote for your work. KIETH GRAY ROOFING & BUILDING is the best extension builder in Seaton Carew. No obligat...
From £2,008
Trusted and professional extension builder in Seaton Carew. Experienced in all extension buildering work and keeping within budget and on quote. DH...
From £2,184
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,136
Building Craft Ltd is an established extension buildering business in Seaton Carew. We come highly recommended and provide competitive quotes for y...
From £2,032
LJP Roofing are here to help customers who need an Extension Builder in Seaton Carew. We offer a competitive rate to complete all your extension bu...
From £1,944
Trusted and professional extension builder in Seaton Carew. Experienced in all extension buildering work and keeping within budget and on quote. Em...
From £2,080
Relax... you have found a reliable extension builder in Seaton Carew. Under Pressure is a friendly and reliable company based in Seaton Carew who c...
From £1,960
Trusted and professional extension builder in Seaton Carew. Experienced in all extension buildering work and keeping within budget and on quote. D ...
From £2,328
Need an Extension Builder in Seaton Carew? Holvey Home Improvements has been helping local clients (20 mile radius) with their extension buildering...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Seaton Carew it ranges from £1,728 (KIETH GRAY ROOFING & BUILDING based in TS24) to £3,112 (Radici Construction North East Ltd based in DH1).
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 Seaton Carew by posting a job with HaMuch and we will send it to extension builders in Seaton Carew.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Hartlepool | £40 | £236 |
| Install An RSJ near Billingham | £44 | £242 |
| Install An RSJ near Middlesbrough | £43 | £236 |
| Install An RSJ near Eston | £42 | £241 |
| Install An RSJ near Redcar | £42 | £240 |
| Install An RSJ near Redcar & Cleveland | £43 | £254 |
| Install An RSJ near Stockton-on-Tees | £41 | £228 |
| Install An RSJ near Peterlee | £36 | £230 |
| Install An RSJ near Thornaby-on-Tees | £42 | £231 |
| Install An RSJ near Ingleby Barwick | £41 | £228 |
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 - £17,451

Two storey extension - £87,927

Build a timber frame extension - £25,951

Build a swimming pool - £80,951

Single storey extension - £54,024

Side return extension - £40,951

Install an RSJ - £2,151

Outbuilding - £9,951

Build a Mansard loft conversion - £51,951

Loft conversion - £33,293

Build a kitchen extension - £41,951

Hip to gable loft conversion - £41,951

Granny annexe - £86,951

Garden office - £9,951

Convert a Garage - £15,951

Garage - £18,451

Build a flat roof extension - £21,951

Build a dormer loft conversion - £41,951

Concrete foundations - £6,201

Convert a bungalow loft - £28,951

Convert a basement - £36,951