Guide
Can I Build a Granny Flat on My Property?
Almost every homeowner asks this first. The honest answer is that it depends on your property — but the factors that decide it are knowable, and most can be checked before you spend anything.
Regulatory information reviewed: 4 September 2026
Address data sourced from the LINZ Data Service · CC BY 4.0.
The six factors that decide feasibility
1. Zoning and district plan standards
Your zone sets the framework: whether an additional dwelling is contemplated, how much of the site can be built on, minimum setbacks, height limits and outdoor living space. Two properties on the same street can sit in different zones.
2. Usable space in the right place
A 700m² section with a long garage, a pool and a mature tree may have less usable building area than a 500m² section with a clear rear yard. What matters is the space that remains once setbacks, outdoor living requirements and existing structures are accounted for.
3. Access
Construction needs a route in. Concrete trucks, framing deliveries or a transportable unit all have practical requirements. Where the route is blocked, craneage or an alternative construction method is used — which changes the budget.
4. Servicing
Wastewater, water and stormwater need to reach the new dwelling. In urban areas this is usually a connection question. On rural and lifestyle land it becomes an on-site treatment and disposal design question.
5. Site conditions
Slope, soil type, drainage and hazard exposure determine foundation and retaining requirements. This is where budgets most often move away from the headline figure.
6. Your brief
A studio for a family member and a two-bedroom rental are different projects with different footprints, servicing loads and parking implications. Feasibility is always assessed against a specific proposal.
What a property check gives you
- Confirmation of your property and its territorial authority
- The preliminary property and planning information available for the address
- A structured brief that a specialist can respond to properly
- A clear view of what still needs professional assessment
Preliminary information suggests many New Zealand properties are worth assessing. Whether yours is depends on the detail — and the detail is what we help you gather.
Next steps
Property and planning information is preliminary only. Eligibility depends on current planning rules, site conditions, servicing, design and professional assessment.
Common questions
- How do I find out if my property qualifies?
- Start with a property check. It identifies your property and the council responsible for its planning rules, then a specialist reviews the site-specific detail with you.
- Does section size decide it?
- Land area matters, but usable space in the right part of the site, access, site coverage, outdoor living requirements and servicing usually decide feasibility.
- Do I need resource consent?
- Some proposals meet permitted standards and some require resource consent. The pathway depends on your zone, the applicable standards and your proposed design.
- What if my property has a hazard overlay?
- Flood, slope stability, coastal and liquefaction considerations do not automatically prevent a build. They usually change the design, engineering and consenting requirements.
Start with your address
A property check takes less than a minute and gives a specialist something useful to work with.