JOHN KNOWLES BUILDING SERVICES are here to help customers who need an Extension Builder in ME18. We offer a competitive rate to complete all your e...
Relax... you have found a reliable extension builder in ME18. ARTBUILD LTD is a friendly and reliable company based in ME18 who consider no job as ...
DAVID WILLIAMSON CONSTRUCTION is a trusted extension builder serving customers in ME18 and the surrounding area. Contact us to today to get a compe...
From £2,016
John Higgins
Relax... you have found a reliable extension builder in ME18. JOHN HIGGINS BUILDING is a friendly and reliable company based in ME18 who c...
From £2,208
TJ RALPH BUILDINGS SERVICES is a trusted extension builder serving customers in ME18 and the surrounding area. Contact us to today to get a competi...
From £2,288
We are a family run, specialist loft conversions company who design and build lofts and extensions in the South East and we pride ourselves on prov...
From £2,104
Frisby Building have over 60 years of experience working in the building industry around Kent, specialising in kitchen and bathroom installations a...
From £2,072
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,112
Need to find an Extension Builder near you for all your extension buildering work?
Flisher Construction Ltd provides a local, trusted exten...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in ME18 it ranges from £2,016 (JOHN HIGGINS BUILDING based in ME18) to £2,288 (Elevate Loft Conversions Ltd based in ME19).
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 ME18 by posting a job with HaMuch and we will send it to extension builders in ME18.
| 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 Tonbridge | £38 | £254 |
| Install An RSJ near Rochester | £39 | £254 |
| Install An RSJ near Sevenoaks | £38 | £234 |
| Install An RSJ near Tunbridge Wells | £37 | £258 |
| 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 |
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 - £17,436

Two storey extension - £87,904

Build a timber frame extension - £25,936

Build a swimming pool - £80,936

Single storey extension - £53,720

Side return extension - £40,780

Install an RSJ - £2,136

Outbuilding - £9,936

Build a Mansard loft conversion - £51,936

Loft conversion - £33,150

Build a kitchen extension - £41,936

Hip to gable loft conversion - £41,936

Granny annexe - £86,936

Garden office - £9,936

Convert a Garage - £15,936

Garage - £18,436

Build a flat roof extension - £21,936

Build a dormer loft conversion - £41,936

Concrete foundations - £6,186

Convert a bungalow loft - £28,936

Convert a basement - £36,780