Resource Consents Explained: What Auckland Property Buyers Need to Know
If you've been reading about Plan Change 120, LIM reports, or natural hazards in Auckland, you've probably hit terms like “non-complying activity,” “restricted discretionary,” or “permitted activity” — and wondered what they actually mean for a property you're thinking about buying.
These are not just bureaucratic jargon. They describe how hard it is to build something on a given site under Auckland's planning rules. The difference between “permitted” and “non-complying” can mean the difference between building 3 townhouses without any council involvement, and spending $40,000 on a consent application that might still get refused.
§ 1.0Why this matters for property buyers
Most Auckland buyers think about zoning in terms of what a property's zone allows. Mixed Housing Suburban? Three dwellings. THAB? Apartments. This is not wrong, but it is incomplete.
The zone tells you what is theoretically possible. The consent pathway tells you how hard it is to actually get there. And since Plan Change 120 took immediate legal effect in November 2025, flood hazard areas and landslide zones have significantly changed those pathways — often without changing the zone itself.
A property can be zoned Mixed Housing Suburban — which normally permits 3 dwellings as of right — and still face a non-complying consent for any new dwelling if it sits in a Very High flood hazard area. The zone has not changed. The consent pathway has.
§ 2.0The six consent categories
New Zealand's Resource Management Act 1991 establishes six activity categories. Every activity in the Auckland Unitary Plan is assigned one of these.
No consent required
Consent required: outcome largely predictable
Consent required: outcome uncertain or unlikely
Cannot be consented
§ 3.0The one that matters most for flood-affected properties
If you are buying a property with a flood hazard, the category that matters most is non-complying (NC). Under PC120, a new dwelling in a Very High or High flood hazard area is a non-complying activity. So is any new dwelling in a flood hazard area in a rural or countryside living zone.
Non-complying consents must pass the Section 104D gateway. The application can only proceed if it passes at least one of two tests:
Test A
The adverse effects on the environment will be minor or less. Difficult: council's own mapping says the site is very high risk, so demonstrating effects are minor requires compelling hydraulic engineering evidence.
Test B
The activity is not contrary to the objectives and policies of the Auckland Unitary Plan. Also difficult: PC120's own objectives say development in these areas should be avoided.
P Note · The buyer's risk in plain English
If you buy a property with Very High flood hazard and intend to build or substantially redevelop, you may spend indicatively $15,000–$50,000 on a non-complying consent application — with costs varying considerably by project — and still have it refused. The zone may say the site supports 3 dwellings. The hazard classification may mean you cannot build any of them.
§ 4.0Permitted activity: what it means and why it matters
The permitted activity category is the most important for most buyers — not because it is the dramatic one, but because it is what you are relying on when you assume you can do something without seeking consent.
Permitted status is binary. If you comply with every standard in the AUP for your zone — height, coverage, setbacks, everything — your activity is permitted and you proceed without resource consent. Miss one standard by a centimetre, and you drop out of the permitted category into restricted discretionary. There is no middle ground.
PC120 has introduced new standards specifically for flood and landslide hazard areas. A development that previously met all standards and was permitted may now fail a new standard — for example, a minimum floor level requirement — and become a restricted discretionary activity. Understanding which new standards apply to your property is part of sound due diligence.
§ 5.0Restricted discretionary: the workable middle ground
For properties in Medium flood hazard areas, the relevant PC120 consent category is typically restricted discretionary. This is manageable. Council can only look at the specific flood-related matters listed in the plan — it cannot refuse on other grounds. With a competent flood risk assessment from a qualified hydraulic engineer, most restricted discretionary applications in Medium hazard areas succeed.
The conditions attached are usually practical: set the floor level at a minimum height above the modelled flood level, ensure safe egress, use flood-resilient materials below a certain level. These add cost to construction but do not typically make development uneconomic.
§ 6.0How to find out which category applies to your property
For any specific development proposal, the consent category is determined by cross-referencing the relevant zone activity table in the AUP with the activity you intend to carry out. For flood hazard situations, you also need to know the PC120 risk classification, which depends on the flood hazard category and whether the property is in an urban or non-urban zone.
The free preview at Know Your Risk NZ shows the flood hazard category and zone for any Auckland address. The full report includes the PC120 risk classification and the relevant consent pathway for your specific combination of zone and hazard — so you know what you are dealing with before you go unconditional.
Check the consent pathway for your property
PC120 risk classification and consent pathway for your specific zone and hazard combination. Instant PDF. $49.
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