How Much Does a Granny Flat Cost in NZ?

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. There are two ways to get there, and which one's cheaper depends on which one you choose.

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

  
  

We offer the following options with our cabins;

• Tiny home on wheels (caravan style)

• Built to Code - Granny Flat

• COC Granny Flat

Same build, same quality — the difference below is what happens with council.

Delivery and Installation

Our cabins are built in our Tauranga yard 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.

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 on a fully consented build covers the 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, consented granny flat typically adds $150,000 to $200,000 to your valuation.

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