From £2,024
Relax... you have found a reliable extension builder in CT15. Cosbuild and Maintenance ltd is a friendly and reliable company based in CT15 who con...
From £1,568
Need to find an Extension Builder near you for all your extension buildering work?
A-Pex Building provides a local, trusted extension build...
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...
From £1,736
4D BUILDERS LTD are here to help customers who need an Extension Builder in CT15. We offer a competitive rate to complete all your e...
From £1,936
Need an Extension Builder in CT15? M LONG T/A MJ BUILDINGS has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £1,864
Experienced extension builder ready to quote for your work. Buildstead is the best extension builder in CT15. No obligation free quotes and many ha...
From £2,136
Experienced extension builder ready to quote for your work. THE EAST CLIFF BUILDING CO LTD is the best extension builder in CT15. No obligation fre...
From £1,976
Tom Clark - Raison Home UK is a trusted extension builder serving customers in CT15 and the surrounding area. Contact us to today to get a competit...
From £1,864
Pentland Homes is an established extension buildering business in CT15. We come highly recommended and provide competitive quotes for your work.
From £2,016
Relax... you have found a reliable extension builder in CT15. LEVEL CONSTRUCTION is a friendly and reliable company based in CT15 who consider no ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CT15 it ranges from £1,568 (A-Pex Building based in CT17) to £2,136 (THE EAST CLIFF BUILDING CO LTD based in CT18).
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 CT15 by posting a job with HaMuch and we will send it to extension builders in CT15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Dover | £25 | £199 |
| Install An RSJ near Deal | £22 | £174 |
| Install An RSJ near Folkestone | £27 | £203 |
| Install An RSJ near Hythe | £27 | £196 |
| Install An RSJ near Canterbury | £28 | £211 |
| Install An RSJ near Margate | £24 | £187 |
| Install An RSJ near Ramsgate | £24 | £187 |
| Install An RSJ near Thanet | £24 | £187 |
| Install An RSJ near Broadstairs | £24 | £187 |
| Install An RSJ near Herne Bay | £24 | £184 |
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 - £17,198

Two storey extension - £87,546

Build a timber frame extension - £25,698

Build a swimming pool - £80,698

Single storey extension - £48,952

Side return extension - £38,098

Install an RSJ - £1,898

Outbuilding - £9,698

Build a Mansard loft conversion - £51,698

Loft conversion - £30,915

Build a kitchen extension - £41,698

Hip to gable loft conversion - £41,698

Granny annexe - £86,698

Garden office - £9,698

Convert a Garage - £15,698

Garage - £18,198

Build a flat roof extension - £21,698

Build a dormer loft conversion - £41,698

Concrete foundations - £5,948

Convert a bungalow loft - £28,698

Convert a basement - £34,098