From £16,476
Have worked in building industry for over 30 years contracts from government to private sector.
From £16,900
T.I Building is a trusted extension builder serving customers in Newtownabbey and the surrounding area. Contact us to today to get a competitive qu...
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 £16,868
Relax... you have found a reliable extension builder in Newtownabbey. SM Plumbing & Heating is a friendly and reliable company based in Newtownabbe...
From £16,836
Trusted and professional extension builder in Newtownabbey. Experienced in all extension buildering work and keeping within budget and on quote. Be...
From £16,796
Ballantine building solutions is an established extension buildering business in Newtownabbey. We come highly recommended and provide competitive q...
From £16,764
Trusted and professional extension builder in Newtownabbey. Experienced in all extension buildering work and keeping within budget and on quote. DG...
From £16,884
Designco Ltd is an established extension buildering business in Newtownabbey. We come highly recommended and provide competitive quotes for your wo...

Underpinning ranges from £16,476 (Anak based in BT40) to £18,060 (Build a Boiler based in BT67), 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 Newtownabbey by posting a job with HaMuch and we will send it to extension builders in Newtownabbey.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Greenisland | £23 | £153 |
| Underpin A Building near Holywood | £23 | £159 |
| Underpin A Building near Belfast | £23 | £161 |
| Underpin A Building near Carrickfergus | £23 | £158 |
| Underpin A Building near Ballyclare | £20 | £124 |
| 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 Comber | £22 | £160 |
| Underpin A Building near Ballygowan | £24 | £183 |
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 - £16,921

Two storey extension - £87,131

Build a timber frame extension - £25,421

Build a swimming pool - £80,421

Single storey extension - £43,416

Side return extension - £34,984

Install an RSJ - £1,621

Outbuilding - £9,421

Build a Mansard loft conversion - £51,421

Loft conversion - £28,320

Build a kitchen extension - £41,421

Hip to gable loft conversion - £41,421

Granny annexe - £86,421

Garden office - £9,421

Convert a Garage - £15,421

Garage - £17,921

Build a flat roof extension - £21,421

Build a dormer loft conversion - £41,421

Concrete foundations - £5,671

Convert a bungalow loft - £28,421

Convert a basement - £30,984