Relax... you have found a reliable extension builder in BT15. SM Plumbing & Heating is a friendly and reliable company based in BT15 who consider n...
From £16,796
Ballantine building solutions is an established extension buildering business in BT15. We come highly recommended and provide competitive quotes fo...
From £16,884
Designco Ltd is an established extension buildering business in BT15. We come highly recommended and provide competitive quotes for your work.
...From £16,676
Trusted and professional extension builder in BT15. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...

Underpinning ranges from £16,676 (Extended living by Gilbert-Ash based in BT12) to £16,884 (Designco Ltd based in BT36), 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 BT15 by posting a job with HaMuch and we will send it to extension builders in BT15.
"Underpin a building" - BT11, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Belfast | £23 | £161 |
| Underpin A Building near Holywood | £23 | £159 |
| Underpin A Building near Greenisland | £23 | £153 |
| Underpin A Building near Carryduff | £23 | £158 |
| Underpin A Building near Comber | £22 | £160 |
| Underpin A Building near Lisburn | £24 | £164 |
| Underpin A Building near Carrickfergus | £23 | £158 |
| Underpin A Building near Ballyclare | £20 | £124 |
| Underpin A Building near Ballygowan | £24 | £183 |
| Underpin A Building near Crumlin | £26 | £194 |
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 - £16,806

Two storey extension - £86,959

Build a timber frame extension - £25,306

Build a swimming pool - £80,306

Single storey extension - £41,120

Side return extension - £33,693

Install an RSJ - £1,506

Outbuilding - £9,306

Build a Mansard loft conversion - £51,306

Loft conversion - £27,244

Build a kitchen extension - £41,306

Hip to gable loft conversion - £41,306

Granny annexe - £86,306

Garden office - £9,306

Convert a Garage - £15,306

Garage - £17,806

Build a flat roof extension - £21,306

Build a dormer loft conversion - £41,306

Concrete foundations - £5,556

Convert a bungalow loft - £28,306

Convert a basement - £29,693