From £2,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,520
Essex Elite Services is a trusted extension builder serving customers in Harold Wood and the surrounding area. Contact us to today to get a competi...
From £2,296
Renov8 Create are here to help customers who need an Extension Builder in Harold Wood. We offer a competitive rate to complete all your extension b...
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...
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 £2,224
Need to find an Extension Builder near you for all your extension buildering work?
D Weaver Builders Ltd provides a local, trusted extensio...
From £2,320
We offer good standard and professional services, with competitive prices and long warrantees
From £2,376
Experienced extension builder ready to quote for your work. PMD Construction is the best extension builder in Harold Wood. No obligation free quote...
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 £2,424
Need to find an Extension Builder near you for all your extension buildering work?
THAMESLINK BUILDING SRVCS LTD provides a local, trusted ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Harold Wood it ranges from £2,104 (Line Up Brickwork Ltd based in CM13) to £2,520 (Essex Elite Services based in CM14).
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 Harold Wood by posting a job with HaMuch and we will send it to extension builders in Harold Wood.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Brentwood | £39 | £255 |
| Install An RSJ near Romford | £45 | £275 |
| Install An RSJ near Billericay | £38 | £248 |
| Install An RSJ near South Ockendon | £58 | £276 |
| Install An RSJ near Basildon | £39 | £251 |
| Install An RSJ near Chafford Hundred | £41 | £261 |
| Install An RSJ near Thurrock | £41 | £260 |
| Install An RSJ near Stanford-le-Hope | £40 | £254 |
| Install An RSJ near Grays | £41 | £261 |
| Install An RSJ near Loughton | £44 | £273 |
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 - £17,651

Two storey extension - £88,227

Build a timber frame extension - £26,151

Build a swimming pool - £81,151

Single storey extension - £58,024

Side return extension - £43,201

Install an RSJ - £2,351

Outbuilding - £10,151

Build a Mansard loft conversion - £52,151

Loft conversion - £35,168

Build a kitchen extension - £42,151

Hip to gable loft conversion - £42,151

Granny annexe - £87,151

Garden office - £10,151

Convert a Garage - £16,151

Garage - £18,651

Build a flat roof extension - £22,151

Build a dormer loft conversion - £42,151

Concrete foundations - £6,401

Convert a bungalow loft - £29,151

Convert a basement - £39,201