From £2,104
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £2,112
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,744
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,640
Bush Builders are a domestic building contracting firm which is based in Upminster, Essex. Covering all of Essex, London and the surrounding areas....
From £2,472
Our building services company Harris Murray Carpentry & Building Ltd has been helping customers in Brentwood, Billericay, and Essex by providing pr...
From £2,520
Essex Elite Services is a trusted extension builder serving customers in CM13 and the surrounding area. Contact us to today to get a competitive qu...
From £2,296
Renov8 Create are here to help customers who need an Extension Builder in CM13. We offer a competitive rate to complete all your extension builderi...
From £2,272
PRESTON BUILDERS LTD is a trusted extension builder serving customers in CM13 and the surrounding area. Contact us to today to get a competitive qu...
From £2,176
Complete house renovations, extensions build, loft conversions, kitchen and bathrooms renovations, plumbing, electrical, plastering, painting & dec...
From £2,400
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CM13 it ranges from £2,104 (Line Up Brickwork Ltd based in CM13) to £2,744 (Clive Williams based in CM13).
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 CM13 by posting a job with HaMuch and we will send it to extension builders in CM13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Brentwood | £39 | £256 |
| Install An RSJ near Billericay | £38 | £248 |
| Install An RSJ near Basildon | £39 | £251 |
| Install An RSJ near Romford | £45 | £275 |
| Install An RSJ near Stanford-le-Hope | £40 | £254 |
| Install An RSJ near South Ockendon | £57 | £276 |
| Install An RSJ near Thurrock | £41 | £260 |
| Install An RSJ near Wickford | £39 | £255 |
| Install An RSJ near Chafford Hundred | £41 | £261 |
| Install An RSJ near Grays | £41 | £261 |
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 - £17,674

Two storey extension - £88,260

Build a timber frame extension - £26,174

Build a swimming pool - £81,174

Single storey extension - £58,472

Side return extension - £43,453

Install an RSJ - £2,374

Outbuilding - £10,174

Build a Mansard loft conversion - £52,174

Loft conversion - £35,378

Build a kitchen extension - £42,174

Hip to gable loft conversion - £42,174

Granny annexe - £87,174

Garden office - £10,174

Convert a Garage - £16,174

Garage - £18,674

Build a flat roof extension - £22,174

Build a dormer loft conversion - £42,174

Concrete foundations - £6,424

Convert a bungalow loft - £29,174

Convert a basement - £39,453