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P ALLEN BUILDERS is an established and experienced local extension builder in Pentre. Please contact us for a free, no obligation quote and competi...
G Wager Building Maintenance is a trusted extension builder serving customers in Pentre and the surrounding area. Contact us to today to get a comp...
Relax... you have found a reliable extension builder in Pentre. Cwtch Property Developments is a friendly and reliable company based in Pentre who ...
Barlam Drylining Ltd are here to help customers who need an Extension Builder in Pentre. We offer a competitive rate to complete all your extension...
We are a small family run business, established over 35 years ago, specialising in Hard Landscaping (Patios) and Block Paving.We a...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,728
Need an Extension Builder in Pentre? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs...
From £1,776
L E JONES BUILDER is an established extension buildering business in Pentre. We come highly recommended and provide competitive quotes for your wor...
From £2,008
Dare Fitness is an established extension buildering business in Pentre. We come highly recommended and provide competitive quotes for your work.
From £1,816
Excel Home Design Ltd is an established extension buildering business in Pentre. We come highly recommended and provide competitive quotes for your...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Pentre it ranges from £1,728 (A POWELL CONSTRUCTION LTD based in CF44) to £2,096 (Barlam Drylining Ltd based in CF45).
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 Pentre by posting a job with HaMuch and we will send it to extension builders in Pentre.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Rhondda, Cynon, Taff | £31 | £209 |
| Install An RSJ near Rhondda | £31 | £206 |
| Install An RSJ near Aberdare | £32 | £212 |
| Install An RSJ near Pontypridd | £33 | £211 |
| Install An RSJ near Maesteg | £38 | £283 |
| Install An RSJ near Merthyr Tydfil | £33 | £220 |
| Install An RSJ near Church Village | £34 | £214 |
| Install An RSJ near Bridgend | £32 | £200 |
| Install An RSJ near Neath Port Talbot | £31 | £224 |
| Install An RSJ near Pyle | £34 | £262 |
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 - £17,177

Two storey extension - £87,515

Build a timber frame extension - £25,677

Build a swimming pool - £80,677

Single storey extension - £48,536

Side return extension - £37,864

Install an RSJ - £1,877

Outbuilding - £9,677

Build a Mansard loft conversion - £51,677

Loft conversion - £30,720

Build a kitchen extension - £41,677

Hip to gable loft conversion - £41,677

Granny annexe - £86,677

Garden office - £9,677

Convert a Garage - £15,677

Garage - £18,177

Build a flat roof extension - £21,677

Build a dormer loft conversion - £41,677

Concrete foundations - £5,927

Convert a bungalow loft - £28,677

Convert a basement - £33,864