EXPERT BUILDING SERVICES is an established and experienced local extension builder in Ampthill. Please contact us for a free, no obligation quote a...
Trusted and professional extension builder in Ampthill. Experienced in all extension buildering work and keeping within budget and on quote. K FREE...
Robert Mason
Relax... you have found a reliable extension builder in Ampthill. Bench Mark Construction is a friendly and reliable company based in Ampthill who ...
RS Plumbing and Heating is a trusted extension builder serving customers in Ampthill and the surrounding area. Contact us to today to get a competi...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
A M Interiors provides a local, trusted extension builde...
Kestutis Palaitis
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in Ampthill? Custom Construction (UK) Ltd has been helping local clients (20 mile radius) with their extension buildering...
Need an Extension Builder in Ampthill? R&J Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering jo...
Experienced extension builder ready to quote for your work. Cousins Builders Ltd is the best extension builder in Ampthill. No obligation free quot...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Ampthill it ranges from £1,824 (K FREEMAN BUILDERS LIMITED based in MK43) to £3,224 (J K L Building Contractors Ltd based in MK42).
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 Ampthill by posting a job with HaMuch and we will send it to extension builders in Ampthill.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ampthill | £38 | £258 |
| Install An RSJ near Mid Bedfordshire | £42 | £276 |
| Install An RSJ near Kempston | £44 | £273 |
| Install An RSJ near South Bedfordshire | £45 | £278 |
| Install An RSJ near Bedford | £45 | £278 |
| Install An RSJ near Bletchley | £39 | £265 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near Dunstable | £41 | £274 |
| Install An RSJ near Luton | £42 | £279 |
| Install An RSJ near Leighton Buzzard | £38 | £270 |
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 - £17,785

Two storey extension - £88,427

Build a timber frame extension - £26,285

Build a swimming pool - £81,285

Single storey extension - £60,696

Side return extension - £44,704

Install an RSJ - £2,485

Outbuilding - £10,285

Build a Mansard loft conversion - £52,285

Loft conversion - £36,420

Build a kitchen extension - £42,285

Hip to gable loft conversion - £42,285

Granny annexe - £87,285

Garden office - £10,285

Convert a Garage - £16,285

Garage - £18,785

Build a flat roof extension - £22,285

Build a dormer loft conversion - £42,285

Concrete foundations - £6,535

Convert a bungalow loft - £29,285

Convert a basement - £40,704