Granny Flats in New Zealand: A Smart Investment with Waikato Shed Company
Granny flats—also known as secondary dwellings—are quickly becoming one of the smartest property investments for New Zealand homeowners. With recent regulatory changes, building a 70m² self-contained unit on your property has never been more accessible.
At Waikato Shed Company, we help Kiwi property owners turn their backyard space into a high-performing investment—without the red tape, delays, or guesswork.
What’s Changed? Easier Rules, Faster Builds
Recent government changes now allow homeowners to build a granny flat up to 70m² without requiring traditional building or resource consents in many regions. This removes a major hurdle and means you can build faster and with less upfront cost.
That said, you still need to meet building code requirements. Your plans must be legitimate and built by Licensed Building Practitioners (LBPs)—and that’s where our team at Waikato Shed Company comes in. We’ll manage the entire process, ensuring your build is compliant, efficient, and stress-free.
How Much Does a Granny Flat Cost?
Here’s a simple breakdown:
Base build cost: From $200,000 for a quality, turnkey-ready two-bedroom unit.
Utility connections: Expect $20,000–$30,000, depending on your site conditions.
Financing Examples (100% lending, interest rate approx. 4.99%):
20 year term ~$365 weekly repayment
30 year term ~$248 weekly repayment
These estimates provide a realistic starting point for anyone considering the addition of a granny flat.
Rental Returns: What Could You Earn?
The potential for rental income is strong, especially with the current housing demand across New Zealand. A modern, well-insulated two-bedroom granny flat can rent for approximately $550 per week in many areas.
Let’s break down the numbers:
- Mortgage repayment (30-year term): ~$250–$300/week
- Insurance, maintenance, other fees: ~$100/week
- Total outgoings: ~$350–$400/week
- Potential profit: ~$150–$200/week positive cash flow
This type of return makes granny flats a smart financial move that helps you build equity and earn steady income.
Construction Timeline: Fast, Efficient, and On Budget
With council consent no longer required in many areas, the build time is significantly reduced. From design to completion, you could be looking at just 3–5 months total.
We handle everything:
- Site assessment
- Engineering and design
- Full project management and construction
At Waikato Shed Company, we pride ourselves on delivering quality structures—on time and on budget.
Getting Started: Your Granny Flat Roadmap
Thinking of building? Here’s how to begin:
- Speak to a Finance Broker: Understand your borrowing capacity and explore your options.
- Get Pre-Approved: Pre-approvals typically last 12 months—plenty of time to finalise plans.
- Engage a Trusted Builder: Our team will guide you through site-specific planning, compliance, and execution.
- Explore Value Add-Ons: Add a consent-free garage, workshop, or carport to expand utility and appeal.
Multi-Purpose Use: More Than Just Extra Space
A granny flat offers flexibility and function:
- Rental income: Ideal for tenants or Airbnb
- Home office: A quiet, detached workspace
- Multi-generational living: Space for elderly parents or adult children
- Guest accommodation: Private, comfortable space for visitors
A Better Use of Land, A Brighter Future for NZ
These new regulations represent a significant step toward smarter land use and more affordable housing options. At Waikato Shed Company, we’re proud to help lead that change—delivering modern, durable, and purpose-built structures across the region.
Legal Disclaimers
Under the Building and Construction (Small Stand-alone Dwellings) Amendment Act 2025. Under this exemption:
- Homeowners can build stand-alone granny flats up to 70 m² without a building consent if certain conditions are met.
- To qualify for the exemption, the granny flat must have a simple design, meet all applicable New Zealand Building Code requirements, and be constructed or supervised by licensed building professionals (such as Licensed Building Practitioners).
- Homeowners must notify their local council before building starts and again when construction is finished, typically through a Project Information Memorandum (PIM) process.
This exemption does not remove the need to comply with the Building Code, require appropriate documentation, or meet other planning and utility requirements.
Start the Building Process Today
Whether you’re ready to build or just exploring your options, we’re here to help. Our experienced team will guide you every step of the way—from concept to completion.
Contact us today to book a free consultation and see how a granny flat could work on your property.
Email our team: info@waikatosheds.co.nz