From £17,036
Experienced extension builder ready to quote for your work. Terry Design is the best extension builder in Craigavon. No obligation free quotes and ...
From £16,860
Power Construction is an established and experienced local extension builder in Craigavon. Please contact us for a free, no obligation quote and co...
From £16,948
Craigavon, BT66
Trusted and professional extension builder in Craigavon. Experienced in all extension buildering work and keeping within budget and on quote. The M...
From £17,140
With extensive extension buildering experience, we provide reliable, high-quality workmanship at competitive prices. G K Contracts Building & Joine...
From £17,516
Need to find an Extension Builder near you for all your extension buildering work?
GMC Construction provides a local, trusted extension bui...
From £17,284
JP&S Construction Ltd is an established extension buildering business in Craigavon. We come highly recommended and provide competitive quotes for y...
From £16,900
T.I Building is a trusted extension builder serving customers in Craigavon and the surrounding area. Contact us to today to get a competitive quote...
From £16,884
Relax... you have found a reliable extension builder in Craigavon. Finch Construction NI is a friendly and reliable company based in Craigavon who ...

Underpinning ranges from £16,860 (Power Construction based in BT65) 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 Craigavon by posting a job with HaMuch and we will send it to extension builders in Craigavon.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Craigavon | £23 | £181 |
| Underpin A Building near Waringstown | £23 | £167 |
| Underpin A Building near Banbridge | £29 | £205 |
| Underpin A Building near Maghaberry | £31 | £205 |
| Underpin A Building near Coalisland | £27 | £223 |
| Underpin A Building near Hillsborough and Culcavy | £25 | £170 |
| Underpin A Building near Lisburn | £24 | £164 |
| Underpin A Building near Crumlin | £26 | £194 |
| Underpin A Building near Dungannon | £30 | £238 |
| Underpin A Building near Ballynahinch | £19 | £189 |
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 - £17,181

Two storey extension - £87,521

Build a timber frame extension - £25,681

Build a swimming pool - £80,681

Single storey extension - £48,618

Side return extension - £37,910

Install an RSJ - £1,881

Outbuilding - £9,681

Build a Mansard loft conversion - £51,681

Loft conversion - £30,758

Build a kitchen extension - £41,681

Hip to gable loft conversion - £41,681

Granny annexe - £86,681

Garden office - £9,681

Convert a Garage - £15,681

Garage - £18,181

Build a flat roof extension - £21,681

Build a dormer loft conversion - £41,681

Concrete foundations - £5,931

Convert a bungalow loft - £28,681

Convert a basement - £33,910