Experienced extension builder ready to quote for your work. THE EAST CLIFF BUILDING CO LTD is the best extension builder in CT20. No obligation fre...
Need an Extension Builder in CT20? M LONG T/A MJ BUILDINGS has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £1,976
Tom Clark - Raison Home UK is a trusted extension builder serving customers in CT20 and the surrounding area. Contact us to today to get a competit...
From £1,944
Trusted and professional extension builder in CT20. Experienced in all extension buildering work and keeping within budget and on quote. Stade Stre...
From £2,040
Trusted and professional extension builder in CT20. Experienced in all extension buildering work and keeping within budget and on quote. Sprinks Co...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CT20 it ranges from £1,936 (M LONG T/A MJ BUILDINGS based in CT19) 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 CT20 by posting a job with HaMuch and we will send it to extension builders in CT20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Folkestone | £31 | £233 |
| Install An RSJ near Hythe | £31 | £228 |
| Install An RSJ near Dover | £29 | £226 |
| Install An RSJ near Ashford | £36 | £256 |
| Install An RSJ near Deal | £26 | £199 |
| Install An RSJ near Canterbury | £31 | £232 |
| Install An RSJ near Faversham | £34 | £235 |
| Install An RSJ near Whitstable | £28 | £214 |
| Install An RSJ near Herne Bay | £28 | £213 |
| Install An RSJ near Margate | £27 | £208 |
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 - £17,306

Two storey extension - £87,710

Build a timber frame extension - £25,806

Build a swimming pool - £80,806

Single storey extension - £51,128

Side return extension - £39,322

Install an RSJ - £2,006

Outbuilding - £9,806

Build a Mansard loft conversion - £51,806

Loft conversion - £31,935

Build a kitchen extension - £41,806

Hip to gable loft conversion - £41,806

Granny annexe - £86,806

Garden office - £9,806

Convert a Garage - £15,806

Garage - £18,306

Build a flat roof extension - £21,806

Build a dormer loft conversion - £41,806

Concrete foundations - £6,056

Convert a bungalow loft - £28,806

Convert a basement - £35,322