Cross lease, and what goes wrong with them

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. Nobody explains it, and the tone people use suggests you should already know.

It is not a trap, and it is not rare. But there is one problem that catches buyers, and almost nothing written for you says plainly what it is. This page is mostly about that.

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. The Court of Appeal says a cross leased home can be a flat inside a building, a semi-detached townhouse, or a free-standing house.¹ Two ordinary houses side by side on one section is a cross lease too.

So you own two things at once. A share of the land, held with the other flat owners. And a lease of your own flat.

Here is the part that sounds wrong the first time you hear it. Because you are one of the owners of the land, you are one of your neighbour’s landlords, and they are one of yours.¹ You are a tenant and a landlord in the same building.

That single fact explains almost everything else on this page. You are not a free agent on your own property. You are in a small permanent committee with the people next door.

The plan is the thing

Your title, the official record of who owns a property and what rights and restrictions come with it, comes with a plan. Most people call it the flats plan. It shows the footprint of each building.

What you lease is the building drawn on that plan.²

You lease the building, not the ground under it. You share the land your flat sits on, and the air above it, with the other owners.¹

What goes wrong

Someone builds something, and nobody updates the plan.

A previous owner adds a conservatory, encloses a deck, extends the kitchen out by two metres, or puts a second storey on. The plan still shows the old footprint. The new part of the building stands on shared land, and the plan does not show it, so nobody leases it.

The Court of Appeal put it plainly in 2026. Where alterations change the flat’s dimensions, those alterations encroach onto shared or restricted land, and the owner’s lease does not cover them at all. The fix is a new plan and a new lease. Until that happens, “there is a defect in title”.¹

The test is whether the work changed the size or shape of the building, outwards or upwards. It is not even whether the neighbours agreed to it at the time.

Ordinary work inside the walls is not this problem. A new kitchen, a rewire, a bathroom: if the work is inside the existing walls and the floor plan did not change, the title is not affected.¹ The same judgment says so, and it is worth knowing before you talk yourself out of a house.

So ask whether anyone has built or extended anything since that plan was drawn.

So does the garden shed count?

You can apply the test yourself while you walk around the place.

Did the thing 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, on that test: a room added on, a conservatory, an enclosed deck, a kitchen pushed out two metres, a second storey.

No, on that test: a new kitchen, a rewire, a bathroom, a fence, a path, a vegetable garden, landscaping. A shed standing on its own sits here too. The Court of Appeal put it this way. 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, and the judgment does not draw that line.

If a thing touches the house, ask.

A tiny house craned onto the section is the same question in a newer form. It stands on its own, so it does not change your floor plan.

One thing to be clear about before you go looking, because it catches people. These are two different questions. Whether the plan needs redrawing is one. Whether the work needed the neighbours’ permission in the first place is another, and that one catches far more.

What is on the ground may never have been yours

A plan can also be silent, and silence is not the same as permission.

What follows is one case, decided in 2026, and every detail of it comes from the tribunal’s own decision.³

A buyer bought a cross lease flat. The marketing said it had one carpark. Two carparks sat on the asphalt between her flat and the neighbour’s, with red reflective markers between them.

Five years after she bought, her neighbour said the carpark she had been using was his. Three years after that he pulled up the markers and put in bollards.

She complained about the agent and lost. The tribunal found the plan did not define the carpark area at all, and that the agent had behaved as a competent agent should. It was not asked to decide who owns the carpark, and it did not.

So thirteen years after she bought, nobody had told her whether the carpark was hers, and the agent who sold it to her was cleared. 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.

One more detail from that case, because it cuts against the easy lesson. The agent had told her to get her lawyer to check the paperwork. Somebody did look, and this still was not caught.

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. So a fence can need consent, and so can a deck or that 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 Court of Appeal said in 2026 that the Property Law Act likely covers that gap, though it 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

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.

Fee simple means you own the land itself, with no time limit and no rent to pay. You will also see it called freehold. It is what buyers compare a cross lease against, and the gap is the market pricing in everything above.

Why these exist at all

The Court of Appeal sets out the history, and all of this section comes from it.¹

They 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.

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”.

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

What this page does not tell you

Whether to buy this house. That depends on the actual plan, the actual lease and the actual building, and those are three documents somebody has to read.

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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