From £17,012
N W Doyle & Son is a trusted extension builder serving customers in Portaferry and the surrounding area. Contact us to today to get a competitive q...
From £16,636
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
From £16,772
apex pharaoh ltd is a trusted extension builder serving customers in Portaferry and the surrounding area. Contact us to today to get a competitive ...

Underpinning ranges from £16,636 (Mount Oriel Conversions & Extensions based in BT8) to £17,012 (N W Doyle & Son based in BT24), 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 Portaferry by posting a job with HaMuch and we will send it to extension builders in Portaferry.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Portaferry | £22 | £164 |
| Underpin A Building near Saintfield | £23 | £162 |
| Underpin A Building near Ballynahinch | £19 | £189 |
| Underpin A Building near Comber | £22 | £160 |
| Underpin A Building near Ballygowan | £24 | £183 |
| Underpin A Building near Carryduff | £23 | £158 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Holywood | £23 | £159 |
| Underpin A Building near Belfast | £23 | £161 |
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 - £16,852

Two storey extension - £87,028

Build a timber frame extension - £25,352

Build a swimming pool - £80,352

Single storey extension - £42,040

Side return extension - £34,210

Install an RSJ - £1,552

Outbuilding - £9,352

Build a Mansard loft conversion - £51,352

Loft conversion - £27,675

Build a kitchen extension - £41,352

Hip to gable loft conversion - £41,352

Granny annexe - £86,352

Garden office - £9,352

Convert a Garage - £15,352

Garage - £17,852

Build a flat roof extension - £21,352

Build a dormer loft conversion - £41,352

Concrete foundations - £5,602

Convert a bungalow loft - £28,352

Convert a basement - £30,210