From £2,248
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Swanscombe. No obligation free ...
From £2,120
Masonic Plumbing and Heating Ltd are here to help customers who need an Extension Builder in Swanscombe. We offer a competitive rate to complete al...
From £2,392
Gb construction are here to help customers who need an Extension Builder in Swanscombe. We offer a competitive rate to complete all your extension...
From £2,384
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Swanscombe. No obligation free quote...
From £2,392
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £2,512
skilled worker who specializes in completing a wide range of building and renovation projects
From £2,816
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Swanscombe and the surrounding area. Contact us to today to get...
From £2,400
Relax... you have found a reliable extension builder in Swanscombe. Derryard Construction Ltd is a friendly and reliable company based in Swanscomb...
From £2,168
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Swanscombe. We offer a competitive rate to complete all your extens...
From £2,232
Relax... you have found a reliable extension builder in Swanscombe. Major Building Contractors Ltd is a friendly and reliable company based in Swan...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Swanscombe it ranges from £2,120 (Masonic Plumbing and Heating Ltd based in BR2) to £2,816 (HOUSE BUILDING SERVICES LIMITED based in DA16).
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 Swanscombe by posting a job with HaMuch and we will send it to extension builders in Swanscombe.
"RSJ installation across a 5 metre section of rear wall." - CHAFFORD HUNDRED, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Northfleet | £41 | £261 |
| Install An RSJ near Grays | £41 | £261 |
| Install An RSJ near Chafford Hundred | £41 | £261 |
| Install An RSJ near Gravesend | £40 | £260 |
| Install An RSJ near Thurrock | £41 | £260 |
| Install An RSJ near Dartford | £51 | £273 |
| Install An RSJ near South Ockendon | £58 | £276 |
| Install An RSJ near Bexley | £42 | £265 |
| Install An RSJ near Stanford-le-Hope | £40 | £254 |
| Install An RSJ near Rochester | £39 | £254 |
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 - £17,666

Two storey extension - £88,250

Build a timber frame extension - £26,166

Build a swimming pool - £81,166

Single storey extension - £58,328

Side return extension - £43,372

Install an RSJ - £2,366

Outbuilding - £10,166

Build a Mansard loft conversion - £52,166

Loft conversion - £35,310

Build a kitchen extension - £42,166

Hip to gable loft conversion - £42,166

Granny annexe - £87,166

Garden office - £10,166

Convert a Garage - £16,166

Garage - £18,666

Build a flat roof extension - £22,166

Build a dormer loft conversion - £42,166

Concrete foundations - £6,416

Convert a bungalow loft - £29,166

Convert a basement - £39,372