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Select your affordable Pentraeth extension builder
Robert Mitchell
Relax... you have found a reliable extension builder in Pentraeth. Property Maintenance Solutions is a friendly and reliable company based in Pentr...
Need an Extension Builder in Pentraeth? Hughes Construction has been helping local clients (20 mile radius) with their extension buildering jobs fo...
Andrew Mortimer
Fiting of door internal/external All joinery work from new joists to fitting off skirting boards Kitchen fitting Staircase or replac...
Paul Williams
Need to find an Extension Builder near you for all your extension buildering work?
W F CLAYTON & CO LTD provides a local, trusted extension...

Underpinning ranges from £17,020 (Property Maintenance Solutions based in LL74) to £17,244 (Balmoral joinery/construction based in LL60), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Pentraeth by posting a job with HaMuch and we will send it to extension builders in Pentraeth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Conwy | £28 | £211 |
| Underpin A Building near Conway | £28 | £211 |
| Underpin A Building near Llandudno | £28 | £211 |
| Underpin A Building 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 - £17,178

Two storey extension - £87,517

Build a timber frame extension - £25,678

Build a swimming pool - £80,678

Single storey extension - £48,560

Side return extension - £37,878

Install an RSJ - £1,878

Outbuilding - £9,678

Build a Mansard loft conversion - £51,678

Loft conversion - £30,731

Build a kitchen extension - £41,678

Hip to gable loft conversion - £41,678

Granny annexe - £86,678

Garden office - £9,678

Convert a Garage - £15,678

Garage - £18,178

Build a flat roof extension - £21,678

Build a dormer loft conversion - £41,678

Concrete foundations - £5,928

Convert a bungalow loft - £28,678

Convert a basement - £33,878