From £16,836
Trusted and professional extension builder in BT29. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £16,884
Relax... you have found a reliable extension builder in BT29. Finch Construction NI is a friendly and reliable company based in BT29 who consider n...
From £16,836
Need an Extension Builder in BT29? H.M.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
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 BT29. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...
From £16,900
T.I Building is a trusted extension builder serving customers in BT29 and the surrounding area. Contact us to today to get a competitive quote for ...
From £16,820
C.H Property Services is a trusted extension builder serving customers in BT29 and the surrounding area. Contact us to today to get a competitive q...
From £16,884
Designco Ltd is an established extension buildering business in BT29. We come highly recommended and provide competitive quotes for your work.
...From £16,868
Relax... you have found a reliable extension builder in BT29. SM Plumbing & Heating is a friendly and reliable company based in BT29 who consider n...
From £16,804
R.J Builders are here to help customers who need an Extension Builder in BT29. We offer a competitive rate to complete all your extension builderin...

Underpinning ranges from £16,676 (Extended living by Gilbert-Ash based in BT12) to £16,900 (T.I Building based in BT28), 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 BT29 by posting a job with HaMuch and we will send it to extension builders in BT29.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Crumlin | £22 | £168 |
| Underpin A Building near Maghaberry | £27 | £175 |
| Underpin A Building near Lisburn | £20 | £139 |
| Underpin A Building near Hillsborough and Culcavy | £21 | £141 |
| Underpin A Building near Belfast | £20 | £137 |
| Underpin A Building near Ballyclare | £17 | £110 |
| Underpin A Building near Carryduff | £20 | £136 |
| Underpin A Building near Waringstown | £21 | £146 |
| Underpin A Building near Greenisland | £20 | £134 |
| Underpin A Building near Holywood | £20 | £138 |
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 - £16,838

Two storey extension - £87,008

Build a timber frame extension - £25,338

Build a swimming pool - £80,338

Single storey extension - £41,768

Side return extension - £34,057

Install an RSJ - £1,538

Outbuilding - £9,338

Build a Mansard loft conversion - £51,338

Loft conversion - £27,548

Build a kitchen extension - £41,338

Hip to gable loft conversion - £41,338

Granny annexe - £86,338

Garden office - £9,338

Convert a Garage - £15,338

Garage - £17,838

Build a flat roof extension - £21,338

Build a dormer loft conversion - £41,338

Concrete foundations - £5,588

Convert a bungalow loft - £28,338

Convert a basement - £30,057