How Much Does It Cost to Build a Granny Flat in Christchurch or Canterbury?
Thinking about building a granny flat on your property? Whether it’s for family, a farm worker, or just a bit of extra space, granny flats are a smart and flexible option — and not as pricey as you might think.
At Pete’s Construction, we’re trusted local builders based in West Melton, and we build granny flats right across Canterbury — either on site, or as transportable units we build in our yard and deliver to you.
Here’s a straight-up look at what it costs to build a one or two-bedroom granny flat in 2025.
Granny Flat Prices in Canterbury
One-Bedroom Granny Flat — From $96,000 (all inclusive)
This price covers everything you need to get it built on site:
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Kitchen and bathroom installed
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Cladding, roofing, painting — the whole lot
That’s a turn-key price — just move your gear in and you’re away.
Transported units are also an option — but delivery and craning will cost extra.
Two-Bedroom Granny Flat — From $131,000 (all inclusive)
Need a bit more space? Our two-bedroom builds are a great option for:
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Elderly parents needing independence but still close by
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Young adults who aren’t ready to leave the nest (or who’ve come back 😅)
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Farm staff needing on-site accommodation
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Short-term rentals or Airbnb setups
Same deal — full build on site with all the key features sorted. We’ll handle it from start to finish.
On-Site Build or Transportable – You Choose
Most of our builds are done right there on your section — especially handy if you’re out in places like Darfield, Leeston, Rolleston, or Prebbleton. But if access is tricky, or you’re keen for a faster build, we can construct the granny flat in our West Melton yard and truck it to your place.
We’ll chat through both options with you and figure out what’s best.
What Can You Use a Granny Flat For?
They’re called granny flats, but they’re not just for Gran. Our clients use them for all sorts of things:
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Accommodation for farm or seasonal workers
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A separate home for Mum or Dad
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Space for the teenagers (or young adults still at home)
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A games room, sleepout or hobby studio
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Short-term rental to bring in extra income
Why Work With Pete’s Construction?
We’re not some big corporate — just a local, trusted team who know how to get stuff done properly. We’ve built granny flats all over Canterbury that are still going strong years later. We:
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Build to suit Canterbury conditions
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Know the council process inside out
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Use solid, proven materials
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Keep things straightforward and honest
Whether it’s a simple one-bedroom setup or a fully kitted-out two-bedder, we can help you make it happen.
Ready to Price Up Your Build?
Flick us an email or head to our Granny Flats page to download our free pricing and floor plan guide — it only takes a couple of minutes. Or give Pete a call and have a yarn about what you’re thinking.