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G. Finnigan Builders is an established extension buildering business in L34. We come highly recommended and provide competitive quotes for your wor...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Liverpool Builder is an established extension buildering business in L34. We come highly recommended and provide competitive quotes for your work.<...
Relax... you have found a reliable extension builder in L34. Hyst is a friendly and reliable company based in L34 who consider no job as too big or...
McBuild is a trusted extension builder serving customers in L34 and the surrounding area. Contact us to today to get a competitive quote for extens...
From £2,576
Paul Rossiter
We are Aurora Building Company & we are the home improvement company you can depend upon to help transform your home to suit your needs. We spe...
From £2,504
Stephen Waddup
Experienced extension builder ready to quote for your work. Spectrum is the best extension builder in L34. No obligation free quotes and many happy...
From £1,304
Anthony Hulme
Liverpool Direct Builders is a trusted extension builder serving customers in L34 and the surrounding area. Contact us to today to get a competitiv...
From £2,096
HIGHTOWN CONSTRUCTION LTD is an established extension buildering business in L34. We come highly recommended and provide competitive quotes for you...
From £2,000
Event planning interior designer new to buisness platform but have project managed a lot of my own home projects and organised events for birthdays...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L34 it ranges from £1,304 (Liverpool Direct Builders based in L14) to £2,576 (Aurora Building company ltd based in L12).
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 L34 by posting a job with HaMuch and we will send it to extension builders in L34.
"Install an RSJ" - L36, job posted 27/09/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Prescot | £31 | £223 |
| Install An RSJ near Knowsley | £31 | £222 |
| Install An RSJ near Huyton with Roby | £31 | £225 |
| Install An RSJ near St Helens | £31 | £224 |
| Install An RSJ near Kirkby | £31 | £224 |
| Install An RSJ near Widnes | £31 | £220 |
| Install An RSJ near Halton | £31 | £220 |
| Install An RSJ near Bootle | £33 | £228 |
| Install An RSJ near Maghull | £34 | £231 |
| Install An RSJ near Liverpool | £31 | £222 |
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 - £17,310

Two storey extension - £87,714

Build a timber frame extension - £25,810

Build a swimming pool - £80,810

Single storey extension - £51,192

Side return extension - £39,358

Install an RSJ - £2,010

Outbuilding - £9,810

Build a Mansard loft conversion - £51,810

Loft conversion - £31,965

Build a kitchen extension - £41,810

Hip to gable loft conversion - £41,810

Granny annexe - £86,810

Garden office - £9,810

Convert a Garage - £15,810

Garage - £18,310

Build a flat roof extension - £21,810

Build a dormer loft conversion - £41,810

Concrete foundations - £6,060

Convert a bungalow loft - £28,810

Convert a basement - £35,358