How Land-to-Asset Ratio Affects Long-Term Capital Growth

If you've spent any time talking to a buyer's agent or reading property investment advice, you've probably heard the phrase "land appreciates, buildings depreciate." It's a bit of a cliché at this point but it's also true, and it's one of the simplest explanations for why two properties bought for the same price can perform completely differently over ten years. The concept behind it is called land-to-asset ratio, and it's worth understanding properly before your next purchase.

What is land-to-asset ratio?

Every property you buy is really two things bundled together: the land it sits on, and the building on top of it. Land-to-asset ratio is simply the proportion of your purchase price that's tied up in the land, versus the proportion tied up in the building.

A freestanding house on a generous block might be, say, 60–70% land value and 30–40% building value. A high-rise apartment, by contrast, might be closer to 10–20% land value: most of what you're paying for is the building itself, split across dozens or hundreds of other owners.

Why does land-to-asset ratio matter for capital growth?

Because land and buildings behave completely differently over time. Land tends to appreciate and buildings tend to depreciate, so the higher the proportion of your purchase price that's tied up in land, the more of your investment is working in your favour over the long term.

Land tends to appreciate. It's a finite resource. Nobody is making more of it, and as a city grows, demand for well-located land keeps climbing. Over the long run, this is where most capital growth actually comes from. The Reserve Bank has made the same point about the market as a whole: most of the extra money Australians have put into residential property has gone into land rather than into the physical stock of housing.

Buildings tend to depreciate. A building is a physical asset that wears out. Kitchens date, roofs need replacing, carpets wear thin. In fact, this is exactly why the tax system lets you claim depreciation on a building: the ATO lets you write off what it cost to build over time, in much the same way you'd write off a car or a laptop used for work.

So when you buy a property, you're really buying a depreciating asset (the building) sitting on top of an appreciating one (the land).

How do a house and an apartment compare at the same price?

Imagine two properties, both bought for $700,000. On paper they cost the same, but underneath they're split very differently between land and building, and that split decides how much of each one is doing the growth work.

Property A is a house on a 500m² block. Say roughly $450,000 of that price is land, and $250,000 is the building. Over 15 years, if the land value doubles (which is a realistic long-run outcome in a good location) and the building loses a chunk of its value to wear and tear, the land component does most of the heavy lifting on growth, and there's a lot of it working for you.

Property B is an apartment in a large complex. Maybe $140,000 of that $700,000 is land, split across all the other apartments in the building, and $560,000 is the building itself. Even if the land underneath doubles in value too, it's a much smaller slice of the total purchase price, so it has far less impact on the overall growth of the asset. Meanwhile the building, the larger share of what you paid for, is depreciating the whole time.

Same purchase price, same city, potentially very different growth outcomes over time. These figures are illustrative, not a forecast: the split between land and building on any specific property is a valuation question, and land values don't move at the same rate everywhere.

What else shifts a property's land-to-asset ratio?

Land-to-asset ratio isn't a strict "house good, apartment bad" rule. It's a spectrum, and plenty of factors shift a property along it:

• Block size. A house on a small, narrow block will have a lower land-to-asset ratio than one on a large, standard block, even in the same suburb.
• Number of dwellings on the title. A house shares no land with anyone. A townhouse shares a block with one or two others. A unit in a large complex might share land with fifty other owners.
• Building size and finish. A large, high-spec home on an average block can tip the ratio more toward the building than you'd expect.
• Location. Land value is also about scarcity and demand: well-located land in a tightly held suburb behaves very differently to land in an area with plenty of vacant space still available to develop.

Is a depreciating building all downside?

No. The same depreciation that works against your capital growth can work in your favour at tax time, and that's the part that often gets missed.

Investors can claim a deduction against their income through capital works deductions (for the building structure itself) and plant and equipment depreciation (for things like carpets, blinds and appliances). Second-hand fittings in an established home are treated more strictly than new ones, so the plant and equipment side is usually larger on a newly built property. It's common practice to get a depreciation schedule prepared by a quantity surveyor, so you're claiming everything you're entitled to.

This doesn't undo the growth trade-off: a lower land-to-asset ratio still generally means less capital growth over time. But it does mean the "depreciating building" side of the equation isn't a pure downside. A newer property with a larger building component, for instance, often comes with a bigger depreciation benefit than an older one, which can meaningfully improve cash flow in the early years of ownership even if the land beneath it is doing less of the growth work.

What does this mean for your next purchase?

Land-to-asset ratio isn't the only thing that matters when you're choosing a property. Cash flow, rental demand and your own financial position all play a role too. But it's a genuinely useful lens for comparing two properties that look similar on the surface, and it explains why a "cheaper" apartment purchase doesn't always end up the better investment over a ten or fifteen year hold.

It's one of the first things we look at when researching a potential project, because a property can tick every lifestyle box and still be a mediocre long-term investment if too much of what you paid for is sitting in a depreciating building rather than appreciating land.