From £2,376
Beech is an established and experienced local extension builder in HP6. 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 £2,408
Relax... you have found a reliable extension builder in HP6. M P TIMLIN (CONSTRUCTION) LTD is a friendly and reliable company based in HP6 who cons...
From £2,352
Hamilton Refurbishments is an established and experienced local extension builder in HP6. Please contact us for a free, no obligation quote and com...
From £2,456
Need an Extension Builder in HP6? Mitre Peak Lofts Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for man...
From £2,416
We are passionate about building bespoke homes using quality products that create unique features both internally and externally.
From £2,224
Trusted and professional extension builder in HP6. Experienced in all extension buildering work and keeping within budget and on quote. ALEXANDER C...
From £2,616
Relax... you have found a reliable extension builder in HP6. GURNEY CONSTRUCTION is a friendly and reliable company based in HP6 who consider no jo...
From £3,056
KATELL PROPERTY MAINTENANCE is a trusted extension builder serving customers in HP6 and the surrounding area. Contact us to today to get a competit...
From £2,544
Be Illuminated are here to help customers who need an Extension Builder in HP6. We offer a competitive rate to complete all your extension builderi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in HP6 it ranges from £2,224 (ALEXANDER CONSTRUCTION based in HP5) to £3,056 (KATELL PROPERTY MAINTENANCE based in WD3).
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 HP6 by posting a job with HaMuch and we will send it to extension builders in HP6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Chesham | £42 | £277 |
| 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 Berkhamsted | £41 | £263 |
| Install An RSJ near Dacorum | £42 | £269 |
| Install An RSJ near Hemel Hempstead | £42 | £270 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Watford | £43 | £278 |
| Install An RSJ near Wycombe | £39 | £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 - £17,800

Two storey extension - £88,450

Build a timber frame extension - £26,300

Build a swimming pool - £81,300

Single storey extension - £61,000

Side return extension - £44,875

Install an RSJ - £2,500

Outbuilding - £10,300

Build a Mansard loft conversion - £52,300

Loft conversion - £36,563

Build a kitchen extension - £42,300

Hip to gable loft conversion - £42,300

Granny annexe - £87,300

Garden office - £10,300

Convert a Garage - £16,300

Garage - £18,800

Build a flat roof extension - £22,300

Build a dormer loft conversion - £42,300

Concrete foundations - £6,550

Convert a bungalow loft - £29,300

Convert a basement - £40,875