From £17,020
Relax... you have found a reliable extension builder in Llanfairpwllgwyngyll. Property Maintenance Solutions is a friendly and reliable company bas...
From £17,220
Need an Extension Builder in Llanfairpwllgwyngyll? Hughes Construction has been helping local clients (20 mile radius) with their extension builder...
From £17,244
Fiting of door internal/external All joinery work from new joists to fitting off skirting boards Kitchen fitting Staircase or replac...
From £17,300
Need an Extension Builder in Llanfairpwllgwyngyll? Chris's Roofing & Property Maintenance has been helping local clients (20 mile radius) with thei...
From £17,228
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 £17,028
Glyndwr Roofing & Building Services are here to help customers who need an Extension Builder in Llanfairpwllgwyngyll. We offer a competitive rate t...
From £16,756
Building & Flat Roofing Contractors is a trusted extension builder serving customers in Llanfairpwllgwyngyll and the surrounding area. Contact us t...

Underpinning ranges from £16,756 (Building & Flat Roofing Contractors based in LL54) to £17,300 (Chris's Roofing & Property Maintenance based in LL31), 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 Llanfairpwllgwyngyll by posting a job with HaMuch and we will send it to extension builders in Llanfairpwllgwyngyll.
| 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 - £17,114

Two storey extension - £87,421

Build a timber frame extension - £25,614

Build a swimming pool - £80,614

Single storey extension - £47,274

Side return extension - £37,154

Install an RSJ - £1,814

Outbuilding - £9,614

Build a Mansard loft conversion - £51,614

Loft conversion - £30,129

Build a kitchen extension - £41,614

Hip to gable loft conversion - £41,614

Granny annexe - £86,614

Garden office - £9,614

Convert a Garage - £15,614

Garage - £18,114

Build a flat roof extension - £21,614

Build a dormer loft conversion - £41,614

Concrete foundations - £5,864

Convert a bungalow loft - £28,614

Convert a basement - £33,154