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Relax... you have found a reliable extension builder in St Columb. BUILDMARK BUILDERS is a friendly and reliable company based in St Columb who con...
Elements Build SW Ltd is an established and experienced local extension builder in St Columb. Please contact us for a free, no obligation quote and...
From £2,288
Need an Extension Builder in St Columb? DAVEY CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs...
From £1,832
Relax... you have found a reliable extension builder in St Columb. KC DESIGN AND BUILD is a friendly and reliable company based in St Columb who co...
From £2,088
HANDLEY BUILDERS is an established and experienced local extension builder in St Columb. Please contact us for a free, no obligation quote and comp...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in St Columb it ranges from £1,832 (KC DESIGN AND BUILD based in TR2) to £2,288 (DAVEY CONSTRUCTION LTD based in PL30).
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 St Columb by posting a job with HaMuch and we will send it to extension builders in St Columb.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Newquay | £32 | £230 |
| Install An RSJ near St Austell | £38 | £245 |
| Install An RSJ near Truro | £31 | £206 |
| Install An RSJ near Falmouth | £33 | £220 |
| Install An RSJ near Camborne | £28 | £196 |
| Install An RSJ near St Ives, Cornwall | £27 | £188 |
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 - £17,377

Two storey extension - £87,816

Build a timber frame extension - £25,877

Build a swimming pool - £80,877

Single storey extension - £52,547

Side return extension - £40,120

Install an RSJ - £2,077

Outbuilding - £9,877

Build a Mansard loft conversion - £51,877

Loft conversion - £32,600

Build a kitchen extension - £41,877

Hip to gable loft conversion - £41,877

Granny annexe - £86,877

Garden office - £9,877

Convert a Garage - £15,877

Garage - £18,377

Build a flat roof extension - £21,877

Build a dormer loft conversion - £41,877

Concrete foundations - £6,127

Convert a bungalow loft - £28,877

Convert a basement - £36,120