How Much Does a Granny Flat Cost in NZ?
- Melisa Aguan
- May 25
- 2 min read
If you're thinking about adding a granny flat to your property, the first question is almost always the same one.
So here's a straight answer: a realistic, honest breakdown of what you'll spend from start to finish no fluff, no hidden surprises at the end. And the timing genuinely is good. The consent-free rules that came into force on 15 January 2026 have taken up to $20,000 off the total cost for most families.
The Build Cost
Our granny flat range starts at $98,900 for the two-bedroom, one-bathroom model. That price covers the complete timber-framed build insulation, kitchen, bathroom, flooring, painting, and all electrical and gas certification.
Our current granny flat range:
10.8 x 3m - Two Bedroom, One Bathroom (33m2) - from $98,900
12 x 4m - Two Bedroom, One Bathroom (48m2) - from $125,900
15 x 4m - Two Bedroom, Two Bathroom (60m2) - from $199,900
12 x 5.8m - Two Bedroom, One Bathroom (70m2) - from $209,900
12 x 5.8m - Three Bedroom, Two Bathroom (70m2) - from $209,900
All models sit under the 70m² consent-free threshold.
Delivery and Installation
Our cabins are built in our Tauranga workshop and transported to your site, so delivery is priced by distance:
• Within 40km - $600
• Within 100km - $1,100
• Within 150km - $1,550
• Within 200km - $2,000
• Further distances contact us for a custom quote.
Delivery includes full setup and levelling. We don't drop and run.
Site Preparation
Your site needs to be ready before the cabin arrives. Depending on your property, this typically runs $500 to $3,000 and covers levelling, a concrete pad or piers if needed, and connecting power from your mains. We walk you through exactly what your site requires during the quoting process.
Council Costs under the 2026 Rules
This is where the new legislation makes a real difference. Before January 2026, building a granny flat meant full building consent $8,000 to $20,000 in fees and up to 12 weeks of waiting. Under the new rules, you're looking at:
Project Information Memorandum (PIM) - $200 to $500
Development contributions - $500 to $2,000
Building consent fee - $0
Total council cost: typically $700 to $2,500, compared to $8,000 to $20,000 under the old process. The average saving is around $10,000 to $15,000.
What to Budget - Complete Cost Summary
Does a Granny Flat Pay for Itself?
For many of our customers, yes and faster than they expected. A two-bedroom granny flat in the Bay of Plenty typically rents for $380 to $450 per week. At that rate, rental income covers the build cost in roughly five to six years. After that, it's pure return.
That's before factoring in what it does to your property value. Based on feedback from our customers, a quality granny flat typically adds $150,000 to $200,000 to your valuation.
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Get a Quote for Your Property
Every site is different, and the only way to get accurate numbers is to talk it through. We'll ask a few questions about your property, your needs, and your budget and give you a clear, no-obligation quote. Call 027 711 8710 or fill in the free quote form at freedomcabinsnz.com
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