Cross lease: what you own, and what to look out for

You have found a house you like. Somewhere in the listing, or in the first thing your lawyer sends you, is the phrase ‘cross lease’.

Cross leases are not a trap, and they are quite common. But owning one works differently from owning a house on its own section, and a few of the differences can matter a great deal in the wrong situation. None of them is a problem by default. What matters is knowing the shape of a cross lease before you sign up to one, rather than finding out afterwards.

The place to start is what you actually own.

What you actually own

A cross-lease means you own a share of the whole section with your neighbours, and you lease your own flat back from all of the owners, usually for 999 years. A plan shows where the buildings sit, and that plan is part of what you are buying.

A ‘flat’ here is not an apartment. It is just the word the paperwork uses for each separate home on the section. A flat can be part of a building, a semi-detached townhouse or a free-standing house. Two ordinary houses side by side on one section can be a cross lease too.¹

Your title, the official record of who owns a property and what rights and restrictions come with it, comes with that plan. Most people call it the flats plan, and it shows the footprint of each building. What you lease is the building drawn on the plan, not the ground under it.²

The land your flat sits on, and the air above it, are shared by all the owners. Because those owners together lease each flat to its owner, you are one of your neighbour’s landlords, and they are one of yours.¹ That may not seem obvious. It can even sound wrong the first time you hear it, given that you set out to buy a house, not to become a landlord.

Most of what makes a cross lease different follows from this one fact. You are not a free agent on your own property. You are in a small permanent committee with the people next door. Some of the consequences are minor and some can be serious and expensive, but each one comes down to a question you can ask before you buy.

What to look out for

The main thing to look out for is building work done after the plan was drawn.

Say a previous owner added a conservatory, enclosed a deck, extended the kitchen out by two metres, or put a second storey on, and nobody updated the plan. The plan still shows the old footprint, and your lease covers only what the plan shows.

On paper, then, the new part is not part of your home. It stands on land you share with the neighbours, and your lease gives you no right to it. You would be paying for a room that your title does not give you.

The fix is a new plan and a new lease. Until both are done, the title has a defect, and the defect stays with the flat when it is sold. If you buy the flat as it stands, you buy that gap with it.

It does not even matter that the neighbours agreed to the work at the time. If the work changed the size or shape of the building, outwards or upwards, the plan has to be redrawn.

Ordinary work inside the walls is different. A new kitchen, a rewire, a bathroom: if the work stayed inside the existing walls and the floor plan did not change, the title is not affected. A renovation inside the house does not create this problem.

Both rules come from a 2026 Court of Appeal judgment that sets out the law on cross leases. On work that changed the building, it says that until the plan and lease are redone, “there is a defect in title”.¹

Ask whether anyone has built or extended anything since the plan was drawn.

So does the garden shed count?

You can check this yourself while you walk around the place. Ask one question: did the work change the shape of the building you lease? That covers outwards and upwards, so a second storey counts as much as a room on the back.

Yes: a room added on, a conservatory, an enclosed deck, a kitchen pushed out two metres, a second storey.

No: a new kitchen, a rewire, a bathroom, a fence, a path, a vegetable garden, landscaping. A shed standing on its own sits here too. An improvement on your own part of the section is not a defect in title, so long as it leaves your floor plan alone and stands independent of your flat.¹

Anything attached to the house is the awkward middle. Think of a carport, a lean-to shed, or a large open deck off the living room. These may or may not count as independent of the building, so if a thing touches the house, ask.

Whether the plan needs redrawing is one question. Whether the work needed the neighbours’ permission in the first place is a separate one, and the answer can be yes even for a fence.

What is on the ground may never have been yours

A plan can also be silent, and silence does not mean something is yours. A case decided in 2026 shows how that plays out.³

In 2013 a couple bought a cross lease flat. The agent had marketed it with one carpark. Two carparks sat on the asphalt between the couple’s flat and the flat next door, with red reflective markers between them.

In 2018 the neighbour said the carpark the couple had been using was on his property. In 2021 the neighbour pulled up the markers, painted new lines and put in bollards.

One of the buyers complained about the agent, and lost. The case ended at the tribunal that hears complaints about real estate agents. It found that the plan did not mark out the carparks at all, and that the agent had acted as a competent agent should. Deciding who owns the carpark was not the tribunal’s job, and it did not.

Thirteen years after buying, the couple still had no answer on whether the carpark was theirs. A line painted on the ground is not a line on your title, and a plan that does not show something is not evidence that you have it.

The agent had recommended getting a lawyer to check the title. Reading the plan would not have settled it, because the plan said nothing about the carparks either way. When something matters to you, like a carpark, ask your lawyer by name whether the plan shows it as yours.

You cannot change things on your own

Cross leases usually say you may not alter or add to your building without the written consent of the other owners, and that they must not unreasonably refuse.¹

That covers more than you expect. The standard wording reaches any building, structure or fence. A fence can therefore need consent, and so can a deck or a freestanding shed.

There is no standard cross lease set by law, so what yours says is a question about your document, not about cross leases in general. Some older ones leave out the “not unreasonably” part. The Property Law Act probably fills that gap, in the Court of Appeal’s view, though the court did not have to decide the point.¹⁴

When owners disagree, it gets expensive. In one case, a couple wanted to extend their house by 54 square metres and add a pool. Their neighbours refused. The neighbours won at arbitration, and the couple challenged that result.

In 2026 the Court of Appeal agreed that the arbitrator had used the wrong test, and sent the question back to be decided again.¹ Nobody has yet ruled on whether the refusal was reasonable.

Two households, one section, and fifteen years between the first of them buying and a decision that still is not final.

What it does to the price

Buyers usually compare a cross lease against freehold. The formal name for freehold is fee simple, which means you own the land itself, with no time limit and no rent to pay.

Cross lease properties generally sell for less than similar freehold properties in the same place.¹ That comes from an Auckland Council study of Auckland titles, published in 2017, so treat it as a direction rather than a number. The gap is the market pricing in everything above.

A cross lease can be converted to freehold, but every owner on the section has to agree. Can you get a cross lease converted to freehold? sets out what that takes.

Why these exist at all

Cross leases were a workaround. Until the end of the 1950s a house sat on its own section, and councils would not let people cut sections up small enough to build more densely. Parliament changed the law so that leasing part of a building did not count as cutting up the land. The cross lease then grew up to fit through that gap.¹

In March 2016 there were 215,958 cross lease titles in New Zealand, and 47 per cent of them were in Auckland.

In 1999 the Law Commission recommended phasing them out and replacing them. That did not happen.

In Auckland, about 44 per cent of these and similar titles had houses built in the 1970s or earlier. The study said those could be nearing the end of their useful life. The Court of Appeal called the redevelopment pressure a “looming problem”.¹

You would be buying into a structure the country’s own law reform body wanted retired more than twenty five years ago, and which is still here.

Why cross leases exist tells the whole story.

Whether to buy this house

Whether to buy depends on the actual plan, the actual lease and the actual building, and somebody has to read and check all three.

What you can do is arrive at your lawyer already knowing what to ask. It is also worth knowing what your lawyer must put in writing before they start.

What to ask your lawyer

1. Has anyone built anything since the flats plan was drawn? If they have, is the plan out of date, and what does fixing it cost me?
2. Does the plan show the carpark, the deck and the garden I think I am getting?
3. What exactly am I allowed to use on my own, and what do I share with the neighbours?
4. What does my lease say about making changes, and whose consent do I need before I do anything?

Say these as they are written. They are normal questions to ask.

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