Granny flat prices (from) - Smart Housing Solutions
Most of our granny flat customers pick a 10m × 3m one-bedroom or a 12m × 3m one-or-two-bedroom configuration. Both are fully self-contained with kitchen, bathroom, bedroom and living space. 2026 starting prices:
- 10m × 3m one-bedroom granny flat: from $72,450
- 10m × 4m one-bedroom granny flat (more living space): from $96,600
- 12m × 3m one-or-two-bedroom granny flat: from $92,000
- 12m × 4m one-or-two-bedroom granny flat: from $119,025
What's included in a granny flat build
A complete Smart Housing Solutions granny flat arrives ready to land and connect. Standard build includes: steel chassis, fully insulated Coloursteel® panel construction, internal lining and flooring, fully fitted kitchen (bench, overhead cabinets, sink, hob, rangehood), bathroom with shower / vanity / toilet, separate bedroom partition, living and dining space, electrical wiring throughout, plumbing rough-in to the chassis edge, and free gate-to-gate North Island delivery on most ≤8×3 designs.
What you'll budget on top of the build price
Granny flats with plumbing and sleeping accommodation almost always require building consent, so the consent process is part of your total spend. Typical added costs:
- Building consent fee: $1,500–5,000 depending on council and complexity
- Site preparation: $2,000–8,000 (concrete piles or gravel pad, levelling, drainage)
- Power connection from main house or street: $1,500–4,000
- Plumbing connection (sewer + water + greywater): $2,000–8,000
- Site project management if not DIY: variable
Why a transportable granny flat costs less than a traditional build
A traditional minor dwelling built on-site by a builder typically runs $200k–350k once you include foundations, framing, services, finishes and council fees - and takes 6–12 months. A transportable granny flat from our workshop is built in 8–14 weeks, arrives complete, lands in a day, and your total spend including site works is usually $95k–160k. The trade-off is that the build is standardised - we don't custom-architect every layout - but for most family situations the standard sizes work well.