From £2,528
Mayfair developers have been in the construction industry for over a decade. Our passion is to transform old spaces into new usable homes for our c...
From £2,280
HED Builders Ltd - Building The Dream is a trusted extension builder serving customers in ME8 and the surrounding area. Contact us to today to ge...
From £2,248
HED Builders Ltd is a London based construction company specialising in the exclusive private housing market. Founded by Chris Hambrook and Marcin ...
From £2,120
DG Building Services Kent Limited is an established and experienced local extension builder in ME8. Please contact us for a free, no obligation quo...
From £2,400
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,280
We are a family run business with over 30 years experience in the roofing industry. We pride ourselves on our high standards of workmanship and cus...
From £2,160
Need to find an Extension Builder near you for all your extension buildering work?
McCready's Lofts & Refurbishments provides a local, trus...
From £2,144
Top Form Construction are here to help customers who need an Extension Builder in ME8. We offer a competitive rate to complete all your extension b...
From £2,104
Zeppelin Construction Ltd is a construction company based in Gillingham, Kent. We offer a wide range of construction services to both domestic and ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in ME8 it ranges from £2,104 (Zeppelin Construction Ltd based in ME7) to £2,624 (Des Durant General Building based in ME5).
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 ME8 by posting a job with HaMuch and we will send it to extension builders in ME8.
"RSJ installation, 203/203/46 beam length 5150mm, also digging concrete pad 900x900x 600 deep for site support post. For more information please get in touch." - RAINHAM, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Gillingham | £39 | £253 |
| Install An RSJ near Chatham | £39 | £254 |
| Install An RSJ near Rochester | £39 | £254 |
| Install An RSJ near Sittingbourne | £35 | £246 |
| Install An RSJ near Maidstone | £40 | £255 |
| Install An RSJ near Larkfield | £41 | £253 |
| Install An RSJ near Swale | £35 | £241 |
| Install An RSJ near Gravesend | £40 | £260 |
| Install An RSJ near Canvey Island | £39 | £256 |
| Install An RSJ near Northfleet | £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 - £17,589

Two storey extension - £88,133

Build a timber frame extension - £26,089

Build a swimming pool - £81,089

Single storey extension - £56,776

Side return extension - £42,499

Install an RSJ - £2,289

Outbuilding - £10,089

Build a Mansard loft conversion - £52,089

Loft conversion - £34,583

Build a kitchen extension - £42,089

Hip to gable loft conversion - £42,089

Granny annexe - £87,089

Garden office - £10,089

Convert a Garage - £16,089

Garage - £18,589

Build a flat roof extension - £22,089

Build a dormer loft conversion - £42,089

Concrete foundations - £6,339

Convert a bungalow loft - £29,089

Convert a basement - £38,499