Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in HP5. GURNEY CONSTRUCTION is a friendly and reliable company based in HP5 who consider no jo...
From £2,408
Relax... you have found a reliable extension builder in HP5. M P TIMLIN (CONSTRUCTION) LTD is a friendly and reliable company based in HP5 who cons...
From £2,224
Trusted and professional extension builder in HP5. Experienced in all extension buildering work and keeping within budget and on quote. ALEXANDER C...
From £2,376
Beech is an established and experienced local extension builder in HP5. Please contact us for a free, no obligation quote and competitive rates. Co...
From £2,552
Distinct Build Ltd. has been built purely on referrals. We care about our client's ideas and needs and work tirelessly to deliver their dreams.
...From £2,432
Our building services company Headline Construction Ltd have twenty years experience and have been helping customers in Berkhamstead, Milton Keynes...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP5 it ranges from £2,224 (ALEXANDER CONSTRUCTION based in HP5) to £2,616 (GURNEY CONSTRUCTION based in HP5).
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 HP5 by posting a job with HaMuch and we will send it to extension builders in HP5.
"RSJ installation" - GREAT MISSENDEN, job posted 09/06/24
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Chesham | £42 | £277 |
| Install An RSJ near Berkhamsted | £41 | £263 |
| Install An RSJ near Dacorum | £42 | £269 |
| Install An RSJ near Hemel Hempstead | £42 | £270 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near Rickmansworth | £42 | £278 |
| Install An RSJ near Gerrards Cross | £43 | £282 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Watford | £43 | £278 |
| Install An RSJ near Wycombe | £40 | £271 |
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 - £17,742

Two storey extension - £88,363

Build a timber frame extension - £26,242

Build a swimming pool - £81,242

Single storey extension - £59,846

Side return extension - £44,226

Install an RSJ - £2,442

Outbuilding - £10,242

Build a Mansard loft conversion - £52,242

Loft conversion - £36,021

Build a kitchen extension - £42,242

Hip to gable loft conversion - £42,242

Granny annexe - £87,242

Garden office - £10,242

Convert a Garage - £16,242

Garage - £18,742

Build a flat roof extension - £22,242

Build a dormer loft conversion - £42,242

Concrete foundations - £6,492

Convert a bungalow loft - £29,242

Convert a basement - £40,226