From £2,208
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...
From £2,512
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in SS11. Please contact us for a free, no obliga...
From £2,512
skilled worker who specializes in completing a wide range of building and renovation projects
From £2,440
M&J Brickwork Ltd are a Chelmsford based Bricklaying & General Building company that operate throughout the Essex and South London...
From £2,168
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in SS11. We offer a competitive rate to complete all your extension bu...
From £2,232
Relax... you have found a reliable extension builder in SS11. Major Building Contractors Ltd is a friendly and reliable company based in SS11 who c...
From £2,912
Experienced extension builder ready to quote for your work. Render is the best extension builder in SS11. No obligation free quotes and many happy ...
From £3,432
Optimus Build Solutions delivers exceptional construction services in London and surronding areas. Specializing in bathroom and kitchen refurbishme...
From £2,232
M & S Builders is a trusted extension builder serving customers in SS11 and the surrounding area. Contact us to today to get a competitive quote fo...
From £1,616
Welcome to RTC Plumbers! With over 15 years of experience, we offer a range of plumbing services from simple repairs to complex installations, each...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SS11 it ranges from £1,616 (RTC Plumbers based in RM6) to £3,432 (Optimus Build Solutions based in Rm1).
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 SS11 by posting a job with HaMuch and we will send it to extension builders in SS11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Wickford | £39 | £255 |
| Install An RSJ near Basildon | £39 | £251 |
| Install An RSJ near Rayleigh | £39 | £252 |
| Install An RSJ near Billericay | £38 | £248 |
| Install An RSJ near Thundersley | £38 | £251 |
| Install An RSJ near Canvey Island | £39 | £256 |
| Install An RSJ near Stanford-le-Hope | £40 | £254 |
| Install An RSJ near Brentwood | £39 | £255 |
| Install An RSJ near Southend-on-Sea | £37 | £247 |
| Install An RSJ near Chelmsford | £38 | £258 |
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 - £17,726

Two storey extension - £88,340

Build a timber frame extension - £26,226

Build a swimming pool - £81,226

Single storey extension - £59,528

Side return extension - £44,047

Install an RSJ - £2,426

Outbuilding - £10,226

Build a Mansard loft conversion - £52,226

Loft conversion - £35,873

Build a kitchen extension - £42,226

Hip to gable loft conversion - £42,226

Granny annexe - £87,226

Garden office - £10,226

Convert a Garage - £16,226

Garage - £18,726

Build a flat roof extension - £22,226

Build a dormer loft conversion - £42,226

Concrete foundations - £6,476

Convert a bungalow loft - £29,226

Convert a basement - £40,047