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Brendan Healy
All building work , all hoyse maintenance. House extension and refurbishment works.
Christian Builders Margate Ltd is a multi-service company founded by Nick Christian. We operate with a highly skilled team of designers, tradesmen,...
GDB CONSTRUCTION is a trusted extension builder serving customers in Sandwich and the surrounding area. Contact us to today to get a competitive qu...
Festim Kastrati
We been for almost 15 years in the building trade,
we are easy going and willing to work with our client and to archive the best r...
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke building projects provides a local, trusted exte...
From £2,232
Jordan Pink
Monarch Builders South East Ltd is an established and experienced local extension builder in Sandwich. Please contact us for a free, no obligation ...
From £1,736
4D BUILDERS LTD are here to help customers who need an Extension Builder in Sandwich. We offer a competitive rate to complete all yo...
From £1,704
Christian Builders Margate Ltd is an established and experienced local extension builder in Sandwich. Please contact us for a free, no obligation q...
From £1,800
Relax... you have found a reliable extension builder in Sandwich. Paragon Stone Design is a friendly and reliable company based in Sandwich who con...
From £1,832
Design – our highly experienced design team can help you visualise your dream outcomes, working sympathetically with your space to find the perfe...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Sandwich it ranges from £1,512 (B H G M Ltd based in CT7) to £2,232 (Monarch Builders South East Ltd based in CT9).
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 Sandwich by posting a job with HaMuch and we will send it to extension builders in Sandwich.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Deal | £26 | £199 |
| Install An RSJ near Margate | £27 | £208 |
| Install An RSJ near Ramsgate | £27 | £208 |
| Install An RSJ near Thanet | £27 | £207 |
| Install An RSJ near Broadstairs | £27 | £208 |
| Install An RSJ near Dover | £29 | £226 |
| Install An RSJ near Canterbury | £31 | £232 |
| Install An RSJ near Herne Bay | £28 | £213 |
| Install An RSJ near Whitstable | £28 | £214 |
| Install An RSJ near Folkestone | £31 | £233 |
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 - £17,126

Two storey extension - £87,438

Build a timber frame extension - £25,626

Build a swimming pool - £80,626

Single storey extension - £47,512

Side return extension - £37,288

Install an RSJ - £1,826

Outbuilding - £9,626

Build a Mansard loft conversion - £51,626

Loft conversion - £30,240

Build a kitchen extension - £41,626

Hip to gable loft conversion - £41,626

Granny annexe - £86,626

Garden office - £9,626

Convert a Garage - £15,626

Garage - £18,126

Build a flat roof extension - £21,626

Build a dormer loft conversion - £41,626

Concrete foundations - £5,876

Convert a bungalow loft - £28,626

Convert a basement - £33,288