From £1,720
Relax... you have found a reliable extension builder in Llangefni. Property Maintenance Solutions is a friendly and reliable company based in Llang...
From £1,920
Need an Extension Builder in Llangefni? Hughes Construction has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £1,944
Fiting of door internal/external All joinery work from new joists to fitting off skirting boards Kitchen fitting Staircase or replac...
From £1,928
Need to find an Extension Builder near you for all your extension buildering work?
W F CLAYTON & CO LTD provides a local, trusted extension...
From £1,728
Glyndwr Roofing & Building Services are here to help customers who need an Extension Builder in Llangefni. We offer a competitive rate to complete ...
From £1,456
Building & Flat Roofing Contractors is a trusted extension builder serving customers in Llangefni and the surrounding area. Contact us to today to ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Llangefni it ranges from £1,456 (Building & Flat Roofing Contractors based in LL54) to £1,944 (Balmoral joinery/construction based in LL60).
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 Llangefni by posting a job with HaMuch and we will send it to extension builders in Llangefni.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Conwy | £28 | £211 |
| Install An RSJ near Conway | £28 | £211 |
| Install An RSJ near Llandudno | £28 | £211 |
| Install An RSJ near Colwyn Bay | £28 | £211 |
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 - £17,083

Two storey extension - £87,374

Build a timber frame extension - £25,583

Build a swimming pool - £80,583

Single storey extension - £46,653

Side return extension - £36,805

Install an RSJ - £1,783

Outbuilding - £9,583

Build a Mansard loft conversion - £51,583

Loft conversion - £29,838

Build a kitchen extension - £41,583

Hip to gable loft conversion - £41,583

Granny annexe - £86,583

Garden office - £9,583

Convert a Garage - £15,583

Garage - £18,083

Build a flat roof extension - £21,583

Build a dormer loft conversion - £41,583

Concrete foundations - £5,833

Convert a bungalow loft - £28,583

Convert a basement - £32,805