From £2,600
Helenski Group Ltd specialises in complete bathroom renovations, luxury tiling, kitchens and full property refurbishments. We have over 20 years of...
From £2,288
Eric Handyman- builder is an established and experienced local extension builder in Denver. Please contact us for a free, no obligation quote and c...
From £1,768
We are a family business providing a one stop shop to meet all your building and renervation needs
From £1,728
Relax... you have found a reliable extension builder in Denver. B & K BUILDING SERVICES is a friendly and reliable company based in Denver who cons...
From £2,216
Need to find an Extension Builder near you for all your extension buildering work?
A Sindall Building provides a local, trusted extension b...
From £2,160
Trusted and professional extension builder in Denver. Experienced in all extension buildering work and keeping within budget and on quote. ANDREW R...
From £1,920
Trusted and professional extension builder in Denver. Experienced in all extension buildering work and keeping within budget and on quote. WEST NOR...
From £1,912
Grey's Construction & Civil Engineering is an established extension buildering business in Denver. We come highly recommended and provide competiti...
From £1,880
NB CONSTRUCTION (UK) LIMITED is an established and experienced local extension builder in Denver. Please contact us for a free, no obligation quote...
From £2,440
Relax... you have found a reliable extension builder in Denver. Fantastic Finishing is a friendly and reliable company based in Denver who consider...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Denver it ranges from £1,728 (B & K BUILDING SERVICES based in PE30) to £2,600 (Helenski Group Ltd based in IP24).
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 Denver by posting a job with HaMuch and we will send it to extension builders in Denver.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Wisbech | £34 | £255 |
| Install An RSJ near King's Lynn | £33 | £254 |
| Install An RSJ near Kings Lynn & West Norfolk | £31 | £238 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Breckland | £28 | £248 |
| Install An RSJ near Thetford | £42 | £277 |
| Install An RSJ near Dereham | £25 | £203 |
| Install An RSJ near Spalding | £32 | £238 |
| Install An RSJ near Peterborough | £40 | £281 |
| Install An RSJ near Bury St Edmunds | £34 | £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 - £17,391

Two storey extension - £87,837

Build a timber frame extension - £25,891

Build a swimming pool - £80,891

Single storey extension - £52,824

Side return extension - £40,276

Install an RSJ - £2,091

Outbuilding - £9,891

Build a Mansard loft conversion - £51,891

Loft conversion - £32,730

Build a kitchen extension - £41,891

Hip to gable loft conversion - £41,891

Granny annexe - £86,891

Garden office - £9,891

Convert a Garage - £15,891

Garage - £18,391

Build a flat roof extension - £21,891

Build a dormer loft conversion - £41,891

Concrete foundations - £6,141

Convert a bungalow loft - £28,891

Convert a basement - £36,276