From £16,900
T.I Building is a trusted extension builder serving customers in BT27 and the surrounding area. Contact us to today to get a competitive quote for ...
From £16,884
Relax... you have found a reliable extension builder in BT27. Finch Construction NI is a friendly and reliable company based in BT27 who consider n...
From £16,836
Trusted and professional extension builder in BT27. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £16,836
Need an Extension Builder in BT27? H.M.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
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 £16,676
Trusted and professional extension builder in BT27. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...
From £16,780
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,820
C.H Property Services is a trusted extension builder serving customers in BT27 and the surrounding area. Contact us to today to get a competitive q...
From £16,708
Need an Extension Builder in BT27? MIRKOW has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get ...

Underpinning ranges from £16,636 (Mount Oriel Conversions & Extensions based in BT8) to £16,988 (AK Building Services based in BT8), 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 BT27 by posting a job with HaMuch and we will send it to extension builders in BT27.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Lisburn | £20 | £139 |
| Underpin A Building near Hillsborough and Culcavy | £21 | £141 |
| Underpin A Building near Carryduff | £20 | £136 |
| Underpin A Building near Maghaberry | £27 | £175 |
| Underpin A Building near Belfast | £20 | £137 |
| Underpin A Building near Saintfield | £20 | £141 |
| Underpin A Building near Ballynahinch | £15 | £150 |
| Underpin A Building near Crumlin | £22 | £168 |
| Underpin A Building near Comber | £20 | £142 |
| 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 - £16,806

Two storey extension - £86,960

Build a timber frame extension - £25,306

Build a swimming pool - £80,306

Single storey extension - £41,128

Side return extension - £33,697

Install an RSJ - £1,506

Outbuilding - £9,306

Build a Mansard loft conversion - £51,306

Loft conversion - £27,248

Build a kitchen extension - £41,306

Hip to gable loft conversion - £41,306

Granny annexe - £86,306

Garden office - £9,306

Convert a Garage - £15,306

Garage - £17,806

Build a flat roof extension - £21,306

Build a dormer loft conversion - £41,306

Concrete foundations - £5,556

Convert a bungalow loft - £28,306

Convert a basement - £29,697