From £2,616
Relax... you have found a reliable extension builder in Kent. Radiant Homes is a friendly and reliable company based in Kent who consider no job as...
From £2,080
GM BUILDING SERVICES are here to help customers who need an Extension Builder in Kent. We offer a competitive rate to complete all your extension b...
From £2,512
Need an Extension Builder in Kent? GS&M Construction has been helping local clients (10 mile radius) with their extension buildering jobs for many ...
From £2,096
Need an Extension Builder in Kent? Make Construction Limited has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £2,232
Trusted and professional extension builder in Kent. Experienced in all extension buildering work and keeping within budget and on quote. Reeve Reno...
From £2,616
Since 2010, we have provided clients with a wide range of specialist services. Reeve Renovations offers a bespoke service for all your residential ...
From £2,168
Relax... you have found a reliable extension builder in Kent. UNIVERSAL CONSTRUCTION is a friendly and reliable company based in Kent who consider ...
From £2,280
Alpha Construction Building Company ltd. undertakes a wide variety of refurbishment works from roofing, kitchens and bathrooms to lofts extensions ...
From £2,200
Experienced extension builder ready to quote for your work. NA Brickwork is the best extension builder in Kent. No obligation free quotes and many ...
From £2,336
Building company specialising in mordenising, extending and re modelling your home.
With a 100% record for fulfilling jobs to the highes...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Kent it ranges from £2,080 (GM BUILDING SERVICES based in BR8) to £2,616 (Radiant Homes based in BR8).
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 Kent by posting a job with HaMuch and we will send it to extension builders in Kent.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bexley | £42 | £265 |
| Install An RSJ near Dartford | £51 | £273 |
| Install An RSJ near Bromley | £42 | £265 |
| Install An RSJ near Northfleet | £41 | £261 |
| Install An RSJ near Sevenoaks | £38 | £234 |
| Install An RSJ near Grays | £41 | £261 |
| Install An RSJ near South Ockendon | £58 | £276 |
| Install An RSJ near Lewisham | £43 | £268 |
| Install An RSJ near Gravesend | £40 | £260 |
| Install An RSJ near Greenwich | £44 | £268 |
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 - £17,614

Two storey extension - £88,170

Build a timber frame extension - £26,114

Build a swimming pool - £81,114

Single storey extension - £57,272

Side return extension - £42,778

Install an RSJ - £2,314

Outbuilding - £10,114

Build a Mansard loft conversion - £52,114

Loft conversion - £34,815

Build a kitchen extension - £42,114

Hip to gable loft conversion - £42,114

Granny annexe - £87,114

Garden office - £10,114

Convert a Garage - £16,114

Garage - £18,614

Build a flat roof extension - £22,114

Build a dormer loft conversion - £42,114

Concrete foundations - £6,364

Convert a bungalow loft - £29,114

Convert a basement - £38,778