From £9,448
Trusted and professional extension builder in BT66. Experienced in all extension buildering work and keeping within budget and on quote. The Method...
From £9,360
Power Construction is an established and experienced local extension builder in BT66. Please contact us for a free, no obligation quote and competi...
From £9,536
Experienced extension builder ready to quote for your work. Terry Design is the best extension builder in BT66. No obligation free quotes and many ...
From £9,640
With extensive extension buildering experience, we provide reliable, high-quality workmanship at competitive prices. G K Contracts Building & Joine...
From £9,400
T.I Building is a trusted extension builder serving customers in BT66 and the surrounding area. Contact us to today to get a competitive quote for ...
From £9,384
Relax... you have found a reliable extension builder in BT66. Finch Construction NI is a friendly and reliable company based in BT66 who consider n...
From £9,336
Trusted and professional extension builder in BT66. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £9,176
Trusted and professional extension builder in BT66. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...
From £9,136
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...

Outbuilding costs in BT66 range from the cheapest of £9,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £10,560 (Build a Boiler based in BT67), 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 BT66 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Waringstown | £23 | £167 |
| Outbuilding near Craigavon | £23 | £181 |
| Outbuilding near Maghaberry | £31 | £205 |
| Outbuilding near Banbridge | £29 | £205 |
| Outbuilding near Hillsborough and Culcavy | £25 | £170 |
| Outbuilding near Lisburn | £24 | £164 |
| Outbuilding near Crumlin | £26 | £194 |
| Outbuilding near Coalisland | £27 | £223 |
| Outbuilding near Carryduff | £23 | £158 |
| Outbuilding 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 - £16,998

Two storey extension - £87,246

Build a timber frame extension - £25,498

Build a swimming pool - £80,498

Single storey extension - £44,952

Side return extension - £35,848

Install an RSJ - £1,698

Outbuilding - £9,498

Build a Mansard loft conversion - £51,498

Loft conversion - £29,040

Build a kitchen extension - £41,498

Hip to gable loft conversion - £41,498

Granny annexe - £86,498

Garden office - £9,498

Convert a Garage - £15,498

Garage - £17,998

Build a flat roof extension - £21,498

Build a dormer loft conversion - £41,498

Concrete foundations - £5,748

Convert a bungalow loft - £28,498

Convert a basement - £31,848