From £16,764
Trusted and professional extension builder in Greenisland. Experienced in all extension buildering work and keeping within budget and on quote. DGA...
From £16,796
Ballantine building solutions is an established extension buildering business in Greenisland. We come highly recommended and provide competitive qu...
From £16,884
Designco Ltd is an established extension buildering business in Greenisland. We come highly recommended and provide competitive quotes for your wor...
From £16,876
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,868
Relax... you have found a reliable extension builder in Greenisland. SM Plumbing & Heating is a friendly and reliable company based in Greenisland ...
From £16,708
Need an Extension Builder in Greenisland? MIRKOW has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
From £16,852
Need to find an Extension Builder near you for all your extension buildering work?
Firenstack Solutions provides a local, trusted extension...
From £16,780
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,676
Trusted and professional extension builder in Greenisland. Experienced in all extension buildering work and keeping within budget and on quote. Ext...
From £16,836
Need an Extension Builder in Greenisland? H.M.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for man...

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 Greenisland by posting a job with HaMuch and we will send it to extension builders in Greenisland.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Greenisland | £23 | £153 |
| Underpin A Building near Carrickfergus | £23 | £158 |
| Underpin A Building near Holywood | £23 | £159 |
| Underpin A Building near Belfast | £23 | £161 |
| Underpin A Building near Ballyclare | £20 | £124 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Bangor | £24 | £183 |
| Underpin A Building near Carryduff | £23 | £158 |
| Underpin A Building near Ballygowan | £24 | £183 |
| Underpin A Building near Larne | £15 | £122 |
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 - £16,804

Two storey extension - £86,956

Build a timber frame extension - £25,304

Build a swimming pool - £80,304

Single storey extension - £41,080

Side return extension - £33,670

Install an RSJ - £1,504

Outbuilding - £9,304

Build a Mansard loft conversion - £51,304

Loft conversion - £27,225

Build a kitchen extension - £41,304

Hip to gable loft conversion - £41,304

Granny annexe - £86,304

Garden office - £9,304

Convert a Garage - £15,304

Garage - £17,804

Build a flat roof extension - £21,304

Build a dormer loft conversion - £41,304

Concrete foundations - £5,554

Convert a bungalow loft - £28,304

Convert a basement - £29,670