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Select your affordable Sevenoaks extension builder
Relax... you have found a reliable extension builder in Sevenoaks. UNIVERSAL CONSTRUCTION is a friendly and reliable company based in Sevenoaks who...
Tony Wickham
Trusted and professional extension builder in Sevenoaks. Experienced in all extension buildering work and keeping within budget and on quote. T WIC...
B C Construction is an established and experienced local extension builder in Sevenoaks. Please contact us for a free, no obligation quote and comp...
Sevenoaks, TN13
Experienced extension builder ready to quote for your work. PPC CONSTRUCTION is the best extension builder in Sevenoaks. No obligation free quotes ...
Need to find an Extension Builder near you for all your extension buildering work?
Egidos Limited provides a local, trusted extension build...
Relax... you have found a reliable extension builder in Sevenoaks. A C Ribbens Building & Decorating is a friendly and reliable company based in Se...
Altin Kodra
Our building services company AL-KO Renovations was established over 12 years ago. Since then we have been helping customers in the area by providi...
Trusted and professional extension builder in Sevenoaks. Experienced in all extension buildering work and keeping within budget and on quote. ORBIT...
From £2,096
M L Builders & Sons Limited is an established and experienced local extension builder in Sevenoaks. Please contact us for a free, no obligation quo...
From £2,464
Our building services company Accuracy Developments Ltd has over 25 years’ experience. We have been helping customers in Westerham and the surrou...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Sevenoaks it ranges from £2,088 (A C Ribbens Building & Decorating based in TN16) to £2,728 (AL-KO Construction Ltd based in BR5).
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 Sevenoaks by posting a job with HaMuch and we will send it to extension builders in Sevenoaks.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Sevenoaks | £38 | £234 |
| Install An RSJ near Tonbridge | £38 | £254 |
| Install An RSJ near Tunbridge Wells | £37 | £258 |
| Install An RSJ near Larkfield | £41 | £253 |
| Install An RSJ near Bexley | £42 | £265 |
| Install An RSJ near Caterham | £43 | £271 |
| Install An RSJ near Bromley | £43 | £268 |
| Install An RSJ near Dartford | £41 | £265 |
| Install An RSJ near Northfleet | £41 | £261 |
| Install An RSJ near Croydon | £42 | £267 |
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 - £17,605

Two storey extension - £88,157

Build a timber frame extension - £26,105

Build a swimming pool - £81,105

Single storey extension - £57,096

Side return extension - £42,679

Install an RSJ - £2,305

Outbuilding - £10,105

Build a Mansard loft conversion - £52,105

Loft conversion - £34,733

Build a kitchen extension - £42,105

Hip to gable loft conversion - £42,105

Granny annexe - £87,105

Garden office - £10,105

Convert a Garage - £16,105

Garage - £18,605

Build a flat roof extension - £22,105

Build a dormer loft conversion - £42,105

Concrete foundations - £6,355

Convert a bungalow loft - £29,105

Convert a basement - £38,679