What is property?

A property is really two things bought together: a patch of land, and whatever is built on it. That sounds obvious, but separating the two in your head explains most of what property prices do, and why a small old house near a city can cost more than a big new one far away.

Land and buildings behave differently

Buildings are like cars: they age, they wear out, and they need money spent on them just to stay the same. A kitchen from 1995 is worth less than a kitchen from this year. Land is the opposite. Nobody is making more of it, and the land people want most, close to jobs, schools, beaches and transport, is fixed in supply forever. So over long stretches, buildings tend to lose value while good land tends to gain it.

This is why the same three bedroom house can cost $450,000 in a regional town and $1,400,000 in an inner suburb of Sydney. The bricks are similar. The land underneath is not. When people say location, location, location, they are really saying that you are mostly buying dirt, and where the dirt sits is nearly everything.

You can watch this split at work in a single street. Picture two houses side by side, each sitting on land worth the same amount, one a tired weatherboard the owner has let run down and the other a freshly renovated brick home. The renovated one sells for more today, and the gap between the two prices is almost entirely the building, because the land beneath them is identical. Now imagine waiting 20 years without spending a cent on either. Both buildings age, so the gap between them shrinks, while the land under both, if the suburb stays wanted, quietly climbs. That is the whole logic of property in one street: the part you can see slowly wears out, and the part nobody can make more of does the earning.

So why does a brand new home, the shiniest thing on the market, sometimes make the weaker buy? Because you are paying top dollar for a building at the exact moment before it starts ageing, often on a smaller block a long way from the city, which means a large slice of your money is sitting in the part that only loses value from here. An older home on a bigger block near transport can look worse and be worth more, because more of its price is land. None of this makes new bad, and a new home can be a lovely place to live. It just means you should always ask what share of a price is land and what share is building, since the two are on opposite paths.

Who is involved

• Owners hold the legal title to the land and buildings, recorded on a government register.
• Tenants pay rent to live in property someone else owns, under a lease that sets out rights on both sides.
• Real estate agents market properties for sale and manage rentals for owners, paid by the owner, not by you.
• Councils and state governments set zoning rules, which decide what can be built where, and charge rates on land.

The owner at the top of that list holds something worth understanding: legal title, recorded on a government register that each state keeps. Ownership of land in Australia is proven by what the register says, not by who holds a piece of paper or who is living there, so the register is the single source of truth about who owns what and what loans are secured against it. When a property sells, the change is registered, and when a bank lends against a home, its interest is registered too. That quiet public record is what lets you buy a house from a stranger and trust that it is really theirs to sell.

Why any of this matters at your age

You will deal with property long before you buy any. Renting a first room or share house means signing a lease, paying a bond and dealing with an agent, and the people on the other side of those documents do this every day. The rest of this topic makes sure you walk in knowing as much as they expect you not to.