From £16,836
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. Belfast...
From £16,884
Relax... you have found a reliable extension builder in Crumlin. Finch Construction NI is a friendly and reliable company based in Crumlin who cons...
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 £16,676
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. Extende...
From £16,900
T.I Building is a trusted extension builder serving customers in Crumlin and the surrounding area. Contact us to today to get a competitive quote f...
From £16,884
Designco Ltd is an established extension buildering business in Crumlin. We come highly recommended and provide competitive quotes for your work.
From £16,868
Relax... you have found a reliable extension builder in Crumlin. SM Plumbing & Heating is a friendly and reliable company based in Crumlin who cons...
From £16,796
Ballantine building solutions is an established extension buildering business in Crumlin. We come highly recommended and provide competitive quotes...
From £16,764
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. DGA hav...

Underpinning ranges from £16,676 (Extended living by Gilbert-Ash based in BT12) 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 Crumlin by posting a job with HaMuch and we will send it to extension builders in Crumlin.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Crumlin | £26 | £194 |
| Underpin A Building near Maghaberry | £31 | £205 |
| Underpin A Building near Lisburn | £24 | £164 |
| Underpin A Building near Hillsborough and Culcavy | £25 | £170 |
| Underpin A Building near Belfast | £23 | £161 |
| Underpin A Building near Ballyclare | £20 | £124 |
| Underpin A Building near Carryduff | £23 | £158 |
| Underpin A Building near Waringstown | £23 | £167 |
| Underpin A Building near Greenisland | £23 | £153 |
| Underpin A Building near Holywood | £23 | £159 |
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 - £16,954

Two storey extension - £87,182

Build a timber frame extension - £25,454

Build a swimming pool - £80,454

Single storey extension - £44,088

Side return extension - £35,362

Install an RSJ - £1,654

Outbuilding - £9,454

Build a Mansard loft conversion - £51,454

Loft conversion - £28,635

Build a kitchen extension - £41,454

Hip to gable loft conversion - £41,454

Granny annexe - £86,454

Garden office - £9,454

Convert a Garage - £15,454

Garage - £17,954

Build a flat roof extension - £21,454

Build a dormer loft conversion - £41,454

Concrete foundations - £5,704

Convert a bungalow loft - £28,454

Convert a basement - £31,362