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 £1,928
Osprey Property Repairs is a trusted extension builder serving customers in CT10 and the surrounding area. Contact us to today to get a competitiv...
From £1,512
All building work , all hoyse maintenance. House extension and refurbishment works.
From £1,256
35 years in the trade can Lay bricks plaster roofing wall and floor tiling
From £1,856
At Wells & Co we offer a comprehensive building service. We specialise in Period properties, bespoke renovations and steel fabrication.Along with o...
From £2,024
Christian Builders Margate Ltd is a multi-service company founded by Nick Christian. We operate with a highly skilled team of designers, tradesmen,...
From £1,752
Small family building business reliable friendly service and very high quality of works
From £1,832
GDB CONSTRUCTION is a trusted extension builder serving customers in CT10 and the surrounding area. Contact us to today to get a competitive quote ...
From £1,640
We been for almost 15 years in the building trade,
we are easy going and willing to work with our client and to archive the best r...
From £1,944
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke building projects provides a local, trusted exte...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CT10 it ranges from £1,256 (S MEGSON CONSTRUCTION based in CT5) to £2,024 (Christian Builders Margate Ltd based in CT12).
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 CT10 by posting a job with HaMuch and we will send it to extension builders in CT10.
"Extending already existing extension by about a meter with some loft windows, there’s already kitchen extension in place but I want to take it further to the other side, I can provide photos and examples" - CT1, job posted 08/01/26
"RSJ installation, knock internal walls down in kitchen" - CT9, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Broadstairs | £27 | £208 |
| Install An RSJ near Ramsgate | £27 | £208 |
| Install An RSJ near Margate | £27 | £208 |
| Install An RSJ near Thanet | £27 | £207 |
| Install An RSJ near Deal | £26 | £199 |
| Install An RSJ near Herne Bay | £28 | £213 |
| Install An RSJ near Canterbury | £31 | £232 |
| Install An RSJ near Dover | £29 | £226 |
| Install An RSJ near Whitstable | £28 | £214 |
| Install An RSJ near Folkestone | £31 | £233 |
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 - £17,031

Two storey extension - £87,297

Build a timber frame extension - £25,531

Build a swimming pool - £80,531

Single storey extension - £45,624

Side return extension - £36,226

Install an RSJ - £1,731

Outbuilding - £9,531

Build a Mansard loft conversion - £51,531

Loft conversion - £29,355

Build a kitchen extension - £41,531

Hip to gable loft conversion - £41,531

Granny annexe - £86,531

Garden office - £9,531

Convert a Garage - £15,531

Garage - £18,031

Build a flat roof extension - £21,531

Build a dormer loft conversion - £41,531

Concrete foundations - £5,781

Convert a bungalow loft - £28,531

Convert a basement - £32,226