Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
Relax... you have found a reliable extension builder in Comber. SM Plumbing & Heating is a friendly and reliable company based in Comber who consid...
From £16,772
apex pharaoh ltd is a trusted extension builder serving customers in Comber and the surrounding area. Contact us to today to get a competitive quot...

Underpinning ranges from £16,636 (Mount Oriel Conversions & Extensions based in BT8) to £16,988 (AK Building Services based in BT8), 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 Comber by posting a job with HaMuch and we will send it to extension builders in Comber.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| 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 Holywood | £23 | £159 |
| Underpin A Building near Saintfield | £23 | £162 |
| Underpin A Building near Belfast | £23 | £161 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Ballynahinch | £19 | £189 |
| Underpin A Building near Greenisland | £23 | £153 |
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 - £16,816

Two storey extension - £86,974

Build a timber frame extension - £25,316

Build a swimming pool - £80,316

Single storey extension - £41,320

Side return extension - £33,805

Install an RSJ - £1,516

Outbuilding - £9,316

Build a Mansard loft conversion - £51,316

Loft conversion - £27,338

Build a kitchen extension - £41,316

Hip to gable loft conversion - £41,316

Granny annexe - £86,316

Garden office - £9,316

Convert a Garage - £15,316

Garage - £17,816

Build a flat roof extension - £21,316

Build a dormer loft conversion - £41,316

Concrete foundations - £5,566

Convert a bungalow loft - £28,316

Convert a basement - £29,805