Power Construction is an established and experienced local extension builder in BT66. Please contact us for a free, no obligation quote and competi...
From £86,448
Trusted and professional extension builder in BT66. Experienced in all extension buildering work and keeping within budget and on quote. The Method...

Building a granny annexe ranges from £86,360 (Power Construction based in BT65) to £86,448 (The Method Group based in BT66), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in BT66 by posting a job with HaMuch. We will send it to extension builders in BT66 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Waringstown | £23 | £167 |
| Granny Annexe near Craigavon | £23 | £181 |
| Granny Annexe near Maghaberry | £31 | £205 |
| Granny Annexe near Banbridge | £29 | £205 |
| Granny Annexe near Hillsborough and Culcavy | £25 | £170 |
| Granny Annexe near Lisburn | £24 | £164 |
| Granny Annexe near Crumlin | £26 | £194 |
| Granny Annexe near Coalisland | £27 | £223 |
| Granny Annexe near Carryduff | £23 | £158 |
| Granny Annexe 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 - £16,904

Two storey extension - £87,106

Build a timber frame extension - £25,404

Build a swimming pool - £80,404

Single storey extension - £43,080

Side return extension - £34,795

Install an RSJ - £1,604

Outbuilding - £9,404

Build a Mansard loft conversion - £51,404

Loft conversion - £28,163

Build a kitchen extension - £41,404

Hip to gable loft conversion - £41,404

Granny annexe - £86,404

Garden office - £9,404

Convert a Garage - £15,404

Garage - £17,904

Build a flat roof extension - £21,404

Build a dormer loft conversion - £41,404

Concrete foundations - £5,654

Convert a bungalow loft - £28,404

Convert a basement - £30,795