1. What is a granny flat / minor dwelling?
A granny flat (also called a minor dwelling or secondary unit) is a self-contained living unit on the same property as your main home. It has its own bedroom(s), kitchen, living area, bathroom, and separate entry.
2. Why build a granny flat now in Auckland?
- Strong demand for small housing and multi-generational living.
- Can provide rental income or space for family.
- Adds value to your property.
- Government reform is underway to make building granny flats easier, including simplified approval for units up to 70m².
3. What are the current Auckland Council rules?
Under the Auckland Unitary Plan:
- Many residential zones allow a minor dwelling as a permitted activity if it meets size and site standards.
- A common guideline is up to 65m² internal floor area for the secondary dwelling (excludes decks/garage).
- The minor dwelling must share the same site and services as the main house.
- Standard zoning rules still apply — such as setbacks, height, site coverage, private outdoor space, and access.
- Infrastructure and service connection requirements must be met.
4. Do I need a building consent right now?
Yes. Under current rules, a granny flat used as a self-contained living unit requires a building consent.
5. What is changing in 2025–2026?
The government is preparing a nationwide granny flat exemption, expected to take effect in early 2026.
This will allow small self-contained houses up to 70m² to be built without a full building consent, provided:
- They meet the Building Code.
- They use licensed building professionals.
- They are structurally simple (not complex builds).
- The council is notified before construction.
Until this becomes law, the current consent system still applies.
6. Should I start now or wait for the reform?
It depends on your goals:
- Build now → You gain rental income or family use sooner, but follow the current consent process.
- Prepare now, build after the exemption → Potentially faster approvals, lower compliance cost, and simpler documentation.
SmartFlat.nz can help plan either path.
7. What does a granny flat typically cost?
Cost depends on:
- Site works (ground conditions, drainage, access).
- Size and layout.
- Level of interior finish.
- Whether you include decks, landscaping, fencing, parking, etc.
We provide fixed-price design+build quotes after a site assessment.
8. How long does the whole process take?
Typical timeline:
- Site check + concept design – 1 to 3 weeks
- Building consent (current rules) – 4 to 12 weeks depending on council
- Construction – 8 to 20 weeks depending on size and materials
If you plan to use the upcoming no-consent pathway, the design and preparation work can be completed now so the build can start quickly once the exemption is active.
9. Can I rent out my granny flat?
Yes, in most cases.
Many owners use granny flats for:
- Long-term rental income
- Housing parents or adult children
- Guest accommodation
- Studio / home office / live-in support space
10. Can I subdivide the granny flat onto its own title?
Not automatically.
Subdivision involves a different approval process and depends on zoning, site size, and infrastructure.
We can assess subdivision potential separately if this is part of your plan.
11. What properties are unsuitable or need extra approvals?
Additional steps may be required if:
- The site is in a special or heritage overlay.
- The land is sloped, flood-prone, or has erosion risk.
- You want to exceed the size, height, or coverage limits.
- You want a highly customised architectural design.
12. How does SmartFlat.nz help?
We handle everything, including:
- Site evaluation and feasibility
- Custom design or pre-designed layouts
- Full council consent documentation (if required)
- Engineering
- Build and project management
- Service connections (water, stormwater, wastewater)
- Turnkey handover
You deal with one team, start to finish.