Adam Porter
Dover, CT17
Need to find an Extension Builder near you for all your extension buildering work?
A-Pex Building provides a local, trusted extension build...
Need an Extension Builder in Dover? M LONG T/A MJ BUILDINGS has been helping local clients (20 mile radius) with their extension buildering jobs fo...
Igor Nikiforoff
Experienced extension builder ready to quote for your work. Buildstead is the best extension builder in Dover. No obligation free quotes and many h...
From £2,024
Relax... you have found a reliable extension builder in Dover. Cosbuild and Maintenance ltd is a friendly and reliable company based in Dover who c...
From £1,736
Dover, CT14
4D BUILDERS LTD are here to help customers who need an Extension Builder in Dover. We offer a competitive rate to complete all your ...
From £1,856
John Nicoll trained as a joiner and carpenter in St Andrew's, Fife. For over 30 years, he has been operating in the London area - setting up 5 Ways...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Dover it ranges from £1,568 (A-Pex Building based in CT17) to £2,024 (Cosbuild and Maintenance ltd based in CT17).
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 Dover by posting a job with HaMuch and we will send it to extension builders in Dover.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Dover | £29 | £226 |
| Install An RSJ near Folkestone | £31 | £233 |
| Install An RSJ near Deal | £26 | £199 |
| Install An RSJ near Hythe | £31 | £228 |
| Install An RSJ near Canterbury | £31 | £232 |
| Install An RSJ near Margate | £27 | £208 |
| Install An RSJ near Ramsgate | £27 | £208 |
| Install An RSJ near Thanet | £27 | £208 |
| Install An RSJ near Broadstairs | £27 | £208 |
| Install An RSJ near Herne Bay | £28 | £213 |
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 - £17,131

Two storey extension - £87,446

Build a timber frame extension - £25,631

Build a swimming pool - £80,631

Single storey extension - £47,613

Side return extension - £37,345

Install an RSJ - £1,831

Outbuilding - £9,631

Build a Mansard loft conversion - £51,631

Loft conversion - £30,288

Build a kitchen extension - £41,631

Hip to gable loft conversion - £41,631

Granny annexe - £86,631

Garden office - £9,631

Convert a Garage - £15,631

Garage - £18,131

Build a flat roof extension - £21,631

Build a dormer loft conversion - £41,631

Concrete foundations - £5,881

Convert a bungalow loft - £28,631

Convert a basement - £33,345