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S ROBERTS ROOFING are here to help customers who need an Extension Builder in Denbigh. We offer a competitive rate to complete all your extension b...
Relax... you have found a reliable extension builder in Denbigh. L & J BUILDERS is a friendly and reliable company based in Denbigh who consider no...
From £1,648
Shaun Davies
We are a company with over 30 years of experience. Who pride ourselves by providing a honest reliable service

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Denbigh it ranges from £1,648 (S A Davies Sustainable Construction Limited based in CH7) to £2,096 (L & J BUILDERS based in LL15).
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 Denbigh by posting a job with HaMuch and we will send it to extension builders in Denbigh.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Rhyl | £28 | £209 |
| Install An RSJ near Prestatyn | £29 | £213 |
| Install An RSJ near Flintshire | £33 | £224 |
| Install An RSJ near Colwyn Bay | £28 | £211 |
| Install An RSJ near Connah's Quay | £33 | £229 |
| Install An RSJ near Hawarden | £33 | £228 |
| Install An RSJ near Heswall | £30 | £213 |
| Install An RSJ near Conwy | £28 | £211 |
| Install An RSJ near Conway | £28 | £211 |
| Install An RSJ near Vale Royal | £35 | £251 |
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 - £17,100

Two storey extension - £87,400

Build a timber frame extension - £25,600

Build a swimming pool - £80,600

Single storey extension - £47,000

Side return extension - £37,000

Install an RSJ - £1,800

Outbuilding - £9,600

Build a Mansard loft conversion - £51,600

Loft conversion - £30,000

Build a kitchen extension - £41,600

Hip to gable loft conversion - £41,600

Granny annexe - £86,600

Garden office - £9,600

Convert a Garage - £15,600

Garage - £18,100

Build a flat roof extension - £21,600

Build a dormer loft conversion - £41,600

Concrete foundations - £5,850

Convert a bungalow loft - £28,600

Convert a basement - £33,000