From £2,816
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in ME20 and the surrounding area. Contact us to today to get a com...
From £2,120
Masonic Plumbing and Heating Ltd are here to help customers who need an Extension Builder in ME20. We offer a competitive rate to complete all your...
From £2,416
Experienced extension builder ready to quote for your work. Liviu Toma is the best extension builder in ME20. No obligation free quotes and many ha...
From £2,456
Lover Build is an established and experienced local extension builder in ME20. Please contact us for a free, no obligation quote and competitive ra...
From £2,072
Need to find an Extension Builder near you for all your extension buildering work?
AMJAC CONSTRUCTION LTD provides a local, trusted extensi...
From £2,376
Witton & Pearce Builders in Essex is a trusted extension builder serving customers in ME20 and the surrounding area. Contact us to today to get a c...
From £2,472
P OUGHTON BUILDING is an established and experienced local extension builder in ME20. Please contact us for a free, no obligation quote and competi...
From £1,656
Experienced extension builder ready to quote for your work. Capital Roofing Ltd is the best extension builder in ME20. No obligation free quotes an...
From £2,560
Need an Extension Builder in ME20? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension buildering j...
From £2,360
Property Maintenance are here to help customers who need an Extension Builder in ME20. We offer a competitive rate to complete all your extension b...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in ME20 it ranges from £1,656 (Capital Roofing Ltd based in SS13) to £2,816 (HOUSE BUILDING SERVICES LIMITED based in DA16).
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 ME20 by posting a job with HaMuch and we will send it to extension builders in ME20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Larkfield | £41 | £253 |
| Install An RSJ near Maidstone | £40 | £255 |
| Install An RSJ near Rochester | £39 | £254 |
| Install An RSJ near Chatham | £39 | £254 |
| Install An RSJ near Gillingham | £39 | £253 |
| Install An RSJ near Gravesend | £40 | £260 |
| Install An RSJ near Northfleet | £41 | £261 |
| Install An RSJ near Tonbridge | £38 | £254 |
| Install An RSJ near Sevenoaks | £38 | £234 |
| Install An RSJ near Sittingbourne | £35 | £246 |
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 - £17,630

Two storey extension - £88,196

Build a timber frame extension - £26,130

Build a swimming pool - £81,130

Single storey extension - £57,608

Side return extension - £42,967

Install an RSJ - £2,330

Outbuilding - £10,130

Build a Mansard loft conversion - £52,130

Loft conversion - £34,973

Build a kitchen extension - £42,130

Hip to gable loft conversion - £42,130

Granny annexe - £87,130

Garden office - £10,130

Convert a Garage - £16,130

Garage - £18,630

Build a flat roof extension - £22,130

Build a dormer loft conversion - £42,130

Concrete foundations - £6,380

Convert a bungalow loft - £29,130

Convert a basement - £38,967