Your Upstairs Neighbour's Flood Just Wrecked Your Unit: Who Actually Pays in NZ

The first sign was water coming down through a light fixture. Not a drip, a real flow, enough that I cut the power to that circuit before I even worked out where it was coming from. It turned out to be a burst connection in the unit above, and by the time it was found and stopped, water had gone through enough of the wiring to blow fuses and short out the oven. I had to call an electrician to make the unit safe again, then a second time to replace the oven. Then the body corporate brought in fans and dehumidifiers, which ran for about two days, and the noise from that turned into its own round of complaints from neighbours who had nothing to do with the leak in the first place. It was a miserable week, and at no point in it was it obvious who was actually going to pay for what.

If you own an apartment or unit-title property and this has not happened to you yet, it is worth understanding the shape of it before it does, because very little of the general "who pays for damage" advice written for standalone rental houses actually applies once a body corporate is involved.

Why This Is Different From a Standalone Rental House

Most NZ guides to flood damage in a rental are written for a single-owner house: Tenancy Services' own guidance on damage and repairs tells you the landlord dries the property and pays for repairs, full stop. In a unit-title development, that is only half the picture. Under section 135 of the Unit Titles Act 2010, a body corporate must insure and keep insured all buildings and improvements on the land to their full insurable value, and how a claim runs, and who ultimately wears the cost, depends on three separate things layered on top of each other: the body corporate's building insurance policy, the body corporate's own operational rules (which often set out how an insurance excess gets apportioned when one owner's negligence caused the damage), and the ordinary Residential Tenancies Act obligations you still owe your own tenant while all of that gets sorted out.

None of those three documents are the same, and none of them move at the same speed. That mismatch is exactly what makes this kind of flood feel so much worse than a burst pipe in a standalone house.

Who Is Actually Liable?

As a rough starting shape: the body corporate's building insurance typically covers physical damage to the building structure and common property, and often extends to cover damage inside affected units as well, since "the building" under a unit title development legally includes more than the shared hallways and roof. Damage to your own contents (the oven, in my case, plus anything else destroyed) may or may not be covered by that same policy, depending on the specific wording, which is why landlord contents insurance on top of the body corporate's building policy is worth having rather than assuming the body corporate has it covered.

The harder question is the insurance excess, and who pays it. Many body corporate operational rules include a clause that lets the body corporate recover its excess from an owner whose negligence, or whose fixture failure, caused the damage, rather than spreading that cost across every owner in the development through a higher body corporate levy. Whether that applies to your situation depends on what actually failed and why. A sudden, unforeseeable pipe failure with no prior sign of a problem reads very differently to a body corporate committee, and to an insurer, than a leak from a fitting that had been reported as faulty months earlier and never fixed. This is a fault-based question, not an automatic "upstairs pays" rule, so do not assume either direction until you have actually seen the body corporate's operational rules and the insurance policy's wording on excess recovery.

If the dollar figure is large, and body corporate insurance excesses can run into five figures on a serious claim, this is worth a conversation with a lawyer who does body corporate/unit titles work specifically, not general tenancy advice. The two areas of law overlap here but are not the same, and a body corporate committee under pressure to keep levies down does not always volunteer the owner-friendly reading of its own rules.

Your Obligations to Your Own Tenant Do Not Pause

This is the part that catches owner-landlords out. While you are dealing with the body corporate, the insurer, and an electrician, your tenant is still living through a flooded, half-powered, fan-and-dehumidifier-filled unit, and the Residential Tenancies Act does not care that the cause was someone else's plumbing three floors up. As Consumer NZ puts it plainly for tenants in this exact situation, the landlord is responsible for maintaining the property regardless of who or what caused the damage. You still owe your tenant a property that is fit to live in, and if the disruption is serious enough (no power to part of the unit, days of industrial drying equipment running, an unusable kitchen while the oven is replaced), the Tenancy Tribunal can order a rent reduction for the period the tenancy's value was reduced, and in some cases compensation on top of that, regardless of the fact that you were not the one who caused the leak.

The practical fix is communication, not law. Tell your tenant plainly what happened, roughly how long the drying and repairs will take, and that you are pursuing the cost from the body corporate rather than treating it as their problem or yours to absorb quietly. Most of the tenant-side frustration in situations like this comes from feeling like nobody is telling them anything, not from the leak itself.

What to Document From the First Hour

Whoever ends up paying, the claim will move on paper, not on memory. From the moment you find the leak:

• Photograph and timestamp everything before anything is touched or dried, including the source if you can identify it, the extent of the water, and anything damaged (the oven, wiring, flooring).
• Get the electrician's and any tradesperson's invoices itemised, broken down rather than a lump total, so it is clear what was made safe versus what was replaced.
• Log every communication with the body corporate committee or manager in writing, including the date you first reported it. Verbal conversations in a hallway do not help you three months later in an excess dispute.
• Keep a record of what you told your tenant and when, separate from the body corporate correspondence, since it is the evidence for your own RTA obligations if a rent-reduction question ever comes up.

Common questions

Who is liable when a flood from an upstairs unit damages your apartment?

The body corporate's building insurance typically covers physical damage to the building structure and common property, and often extends to damage inside affected units too. Whether the upstairs owner personally wears the cost is a fault-based question - a sudden, unforeseeable failure reads differently to a previously-reported, never-fixed fault - not an automatic 'upstairs pays' rule.

Who pays the body corporate insurance excess after a flood?

Many body corporate operational rules let the body corporate recover its excess from an owner whose negligence or fixture failure caused the damage, rather than spreading the cost across every owner through a higher levy. Whether that applies depends on what actually failed and why, so check the operational rules and the policy's excess-recovery wording before assuming either direction.

Do my obligations to my tenant pause while the body corporate sorts out liability?

No. The Residential Tenancies Act does not care that the cause was someone else's plumbing upstairs - you still owe your tenant a property fit to live in, and the Tenancy Tribunal can order a rent reduction, or compensation, for the period the tenancy's value was reduced, regardless of who was at fault for the leak itself.

RentManager keeps maintenance and incident records, documents, and photos attached to the property with a timestamp, so if a dispute over who was liable, or when you told your tenant what, drags on for months, the paper trail is already sitting there rather than scattered across email threads and phone photos.