From £16,948
Trusted and professional extension builder in Derryadd. Experienced in all extension buildering work and keeping within budget and on quote. The Me...
From £16,860
Power Construction is an established and experienced local extension builder in Derryadd. Please contact us for a free, no obligation quote and com...
From £17,036
Experienced extension builder ready to quote for your work. Terry Design is the best extension builder in Derryadd. No obligation free quotes and m...
From £17,140
With extensive extension buildering experience, we provide reliable, high-quality workmanship at competitive prices. G K Contracts Building & Joine...
From £16,900
T.I Building is a trusted extension builder serving customers in Derryadd 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 Derryadd. Finch Construction NI is a friendly and reliable company based in Derryadd who co...
From £16,836
Trusted and professional extension builder in Derryadd. Experienced in all extension buildering work and keeping within budget and on quote. Belfas...
From £16,836
Need an Extension Builder in Derryadd? H.M.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
From £16,676
Trusted and professional extension builder in Derryadd. Experienced in all extension buildering work and keeping within budget and on quote. Extend...

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 Derryadd by posting a job with HaMuch and we will send it to extension builders in Derryadd.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Waringstown | £23 | £167 |
| Underpin A Building near Craigavon | £23 | £181 |
| Underpin A Building near Maghaberry | £31 | £205 |
| Underpin A Building near Banbridge | £29 | £205 |
| 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 Coalisland | £27 | £223 |
| Underpin A Building near Carryduff | £23 | £158 |
| 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 - £17,018

Two storey extension - £87,276

Build a timber frame extension - £25,518

Build a swimming pool - £80,518

Single storey extension - £45,352

Side return extension - £36,073

Install an RSJ - £1,718

Outbuilding - £9,518

Build a Mansard loft conversion - £51,518

Loft conversion - £29,228

Build a kitchen extension - £41,518

Hip to gable loft conversion - £41,518

Granny annexe - £86,518

Garden office - £9,518

Convert a Garage - £15,518

Garage - £18,018

Build a flat roof extension - £21,518

Build a dormer loft conversion - £41,518

Concrete foundations - £5,768

Convert a bungalow loft - £28,518

Convert a basement - £32,073