From £17,020
Relax... you have found a reliable extension builder in Penmaenmawr. Property Maintenance Solutions is a friendly and reliable company based in Pen...
From £17,220
Need an Extension Builder in Penmaenmawr? Hughes Construction has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £17,372
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £17,076
Relax... you have found a reliable extension builder in Penmaenmawr. UK Leisure Living Ltd is a friendly and reliable company based in Penmaenmawr ...
From £17,300
Need an Extension Builder in Penmaenmawr? Chris's Roofing & Property Maintenance has been helping local clients (20 mile radius) with their extensi...
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 £16,756
Building & Flat Roofing Contractors is a trusted extension builder serving customers in Penmaenmawr and the surrounding area. Contact us to today t...
From £17,332
Wood floor services is a trusted extension builder serving customers in Penmaenmawr and the surrounding area. Contact us to today to get a competi...
From £16,916
Octagon Construction Ltd is a trusted extension builder serving customers in Penmaenmawr and the surrounding area. Contact us to today to get a com...

Underpinning ranges from £16,756 (Building & Flat Roofing Contractors based in LL54) to £17,372 (Brothers Construction based in LL18), 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 Penmaenmawr by posting a job with HaMuch and we will send it to extension builders in Penmaenmawr.
| 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 |
| Underpin A Building near Rhyl | £28 | £209 |
| Underpin A Building near Prestatyn | £29 | £213 |
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 - £17,146

Two storey extension - £87,470

Build a timber frame extension - £25,646

Build a swimming pool - £80,646

Single storey extension - £47,928

Side return extension - £37,522

Install an RSJ - £1,846

Outbuilding - £9,646

Build a Mansard loft conversion - £51,646

Loft conversion - £30,435

Build a kitchen extension - £41,646

Hip to gable loft conversion - £41,646

Granny annexe - £86,646

Garden office - £9,646

Convert a Garage - £15,646

Garage - £18,146

Build a flat roof extension - £21,646

Build a dormer loft conversion - £41,646

Concrete foundations - £5,896

Convert a bungalow loft - £28,646

Convert a basement - £33,522