T.I Building is a trusted extension builder serving customers in BT28 and the surrounding area. Contact us to today to get a competitive quote for ...
From £9,336
Trusted and professional extension builder in BT28. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £9,384
Relax... you have found a reliable extension builder in BT28. Finch Construction NI is a friendly and reliable company based in BT28 who consider n...

Outbuilding costs in BT28 range from the cheapest of £9,336 (Belfast Loft Company based in BT17) to the dearest of £9,400 (T.I Building based in BT28), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in BT28 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Lisburn | £24 | £164 |
| Outbuilding near Hillsborough and Culcavy | £25 | £170 |
| Outbuilding near Maghaberry | £31 | £205 |
| Outbuilding near Carryduff | £23 | £158 |
| Outbuilding near Crumlin | £26 | £194 |
| Outbuilding near Belfast | £23 | £161 |
| Outbuilding near Waringstown | £23 | £167 |
| Outbuilding near Saintfield | £23 | £162 |
| Outbuilding near Ballynahinch | £19 | £189 |
| Outbuilding 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 - £16,873

Two storey extension - £87,060

Build a timber frame extension - £25,373

Build a swimming pool - £80,373

Single storey extension - £42,467

Side return extension - £34,450

Install an RSJ - £1,573

Outbuilding - £9,373

Build a Mansard loft conversion - £51,373

Loft conversion - £27,875

Build a kitchen extension - £41,373

Hip to gable loft conversion - £41,373

Granny annexe - £86,373

Garden office - £9,373

Convert a Garage - £15,373

Garage - £17,873

Build a flat roof extension - £21,373

Build a dormer loft conversion - £41,373

Concrete foundations - £5,623

Convert a bungalow loft - £28,373

Convert a basement - £30,450