From £2,080
PADMANS BUILDERS is a trusted extension builder serving customers in TN12 and the surrounding area. Contact us to today to get a competitive quote ...
From £2,016
Relax... you have found a reliable extension builder in TN12. JOHN HIGGINS BUILDING is a friendly and reliable company based in TN12 who c...
From £2,208
TJ RALPH BUILDINGS SERVICES is a trusted extension builder serving customers in TN12 and the surrounding area. Contact us to today to get a competi...
From £2,072
DAVID WILLIAMSON CONSTRUCTION is a trusted extension builder serving customers in TN12 and the surrounding area. Contact us to today to get a compe...
From £2,072
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,120
Need to find an Extension Builder near you for all your extension buildering work?
Broardview Construction provides a local, trusted extens...
From £4,696
All my work is top class and I've taken pride in everything I do I will come and hire me
From £2,240
Tunbridge Wells Builders are here to help customers who need an Extension Builder in TN12. We offer a competitive rate to complete all your extensi...
From £2,184
Relax... you have found a reliable extension builder in TN12. ARTBUILD LTD is a friendly and reliable company based in TN12 who consider no job as ...
From £2,032
DS BUILDERS is an established extension buildering business in TN12. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in TN12 it ranges from £2,016 (JOHN HIGGINS BUILDING based in ME18) to £4,696 (Transform Builders based in TN12).
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 TN12 by posting a job with HaMuch and we will send it to extension builders in TN12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Tonbridge | £33 | £226 |
| Install An RSJ near Maidstone | £36 | £226 |
| Install An RSJ near Tunbridge Wells | £33 | £228 |
| Install An RSJ near Larkfield | £36 | £224 |
| Install An RSJ near Sevenoaks | £34 | £211 |
| Install An RSJ near Rochester | £34 | £220 |
| Install An RSJ near Crowborough | £31 | £225 |
| Install An RSJ near Chatham | £34 | £220 |
| Install An RSJ near Gillingham | £34 | £219 |
| Install An RSJ near Wealden | £30 | £219 |
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 - £17,672

Two storey extension - £88,258

Build a timber frame extension - £26,172

Build a swimming pool - £81,172

Single storey extension - £58,440

Side return extension - £43,435

Install an RSJ - £2,372

Outbuilding - £10,172

Build a Mansard loft conversion - £52,172

Loft conversion - £35,363

Build a kitchen extension - £42,172

Hip to gable loft conversion - £42,172

Granny annexe - £87,172

Garden office - £10,172

Convert a Garage - £16,172

Garage - £18,672

Build a flat roof extension - £22,172

Build a dormer loft conversion - £42,172

Concrete foundations - £6,422

Convert a bungalow loft - £29,172

Convert a basement - £39,435