From £2,136
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..
From £1,656
we are very efficient in our work.and make sure our client is one 100% satisfied with our work.
From £2,656
A.J Builders is an established and experienced local extension builder in HP19. Please contact us for a free, no obligation quote and competitive r...
From £2,472
Top Notch Tradesmen is an established and experienced local extension builder in HP19. Please contact us for a free, no obligation quote and compet...
From £2,544
Need to find an Extension Builder near you for all your extension buildering work?
Greg-Bud provides a local, trusted extension buildering ...
From £2,480
Member since August 2026
Relax... you have found a reliable extension builder in HP19. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in HP19 who co...
From £2,392
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,432
If you are looking for a HP19 extension builder and you need something replaced, fitted, or fixed, contact Space Above Limited today. We are compet...
From £2,200
Member since July 2020
EB Construction & Building Ltd are here to help customers who need an Extension Builder in HP19. We offer a competitive rate to complete all your e...
From £2,312
JASON SHARP SHARP BUILDERS is a trusted extension builder serving customers in HP19 and the surrounding area. Contact us to today to get a competit...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP19 it ranges from £1,656 (Rite Builders based in LU1) to £2,656 (A.J Builders based in LU4).
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 HP19 by posting a job with HaMuch and we will send it to extension builders in HP19.
"Install an RSJ" - HP20, job posted 01/01/70
"RSJ installation" - HP21, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Leighton Buzzard | £38 | £270 |
| Install An RSJ near Berkhamsted | £41 | £263 |
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Bletchley | £39 | £265 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near Wycombe | £39 | £271 |
| Install An RSJ near Dunstable | £41 | £272 |
| Install An RSJ near High Wycombe | £39 | £272 |
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 - £17,628

Two storey extension - £88,192

Build a timber frame extension - £26,128

Build a swimming pool - £81,128

Single storey extension - £57,560

Side return extension - £42,940

Install an RSJ - £2,328

Outbuilding - £10,128

Build a Mansard loft conversion - £52,128

Loft conversion - £34,950

Build a kitchen extension - £42,128

Hip to gable loft conversion - £42,128

Granny annexe - £87,128

Garden office - £10,128

Convert a Garage - £16,128

Garage - £18,628

Build a flat roof extension - £22,128

Build a dormer loft conversion - £42,128

Concrete foundations - £6,378

Convert a bungalow loft - £29,128

Convert a basement - £38,940