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 £1,800
Relax... you have found a reliable extension builder in CT12. Paragon Stone Design is a friendly and reliable company based in CT12 who consider no...
From £1,704
Christian Builders Margate Ltd is an established and experienced local extension builder in CT12. Please contact us for a free, no obligation quote...
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 £1,832
GDB CONSTRUCTION is a trusted extension builder serving customers in CT12 and the surrounding area. Contact us to today to get a competitive quote ...
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...
From £2,128
Teekay solutions Limited is an established and experienced local extension builder in CT12. Please contact us for a free, no obligation quote and c...
From £1,832
Design – our highly experienced design team can help you visualise your dream outcomes, working sympathetically with your space to find the perfe...
From £1,512
All building work , all hoyse maintenance. House extension and refurbishment works.
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...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CT12 it ranges from £1,512 (B H G M Ltd based in CT7) to £2,128 (Teekay solutions Limited based in CT9).
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 CT12 by posting a job with HaMuch and we will send it to extension builders in CT12.
"RSJ installation, knock internal walls down in kitchen" - CT9
"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
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Thanet | £24 | £187 |
| Install An RSJ near Margate | £24 | £187 |
| Install An RSJ near Ramsgate | £24 | £187 |
| Install An RSJ near Broadstairs | £24 | £187 |
| Install An RSJ near Deal | £22 | £174 |
| Install An RSJ near Herne Bay | £24 | £184 |
| Install An RSJ near Canterbury | £28 | £211 |
| Install An RSJ near Whitstable | £24 | £184 |
| Install An RSJ near Dover | £25 | £199 |
| Install An RSJ near Folkestone | £27 | £203 |
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 - £17,127

Two storey extension - £87,441

Build a timber frame extension - £25,627

Build a swimming pool - £80,627

Single storey extension - £47,544

Side return extension - £37,306

Install an RSJ - £1,827

Outbuilding - £9,627

Build a Mansard loft conversion - £51,627

Loft conversion - £30,255

Build a kitchen extension - £41,627

Hip to gable loft conversion - £41,627

Granny annexe - £86,627

Garden office - £9,627

Convert a Garage - £15,627

Garage - £18,127

Build a flat roof extension - £21,627

Build a dormer loft conversion - £41,627

Concrete foundations - £5,877

Convert a bungalow loft - £28,627

Convert a basement - £33,306