Remember the quarter-acre block? That's about 1,000 square metres. In a lot of new estates today you'll be lucky to get half of that, and many lots are well under 400 square metres. Meanwhile land prices keep climbing, and young families are left wondering where the veggie patch, the trampoline and the dog will go.

I'm not against smaller blocks. They suit plenty of people. My problem is that families are being pushed onto lots that don't fit how families actually live, and the system has few reasons to fix it.

Why blocks keep getting smaller

Land is the expensive part of a new home, and its price has outpaced building costs for years. In the September quarter 2025 the national median price of residential land hit a record of more than $390,000 (HIA-Cotality Residential Land Report).

When land is that dear, everyone in the chain has a reason to cut it smaller:

  • Developers get more lots out of each hectare, and a smaller lot keeps the sticker price within reach of buyers' borrowing limits.
  • Councils and the State are under pressure to fit more homes into growth areas, and more lots means more rates and infrastructure charges.
  • Buyers often choose the smaller lot because it's the only one they can afford.

The result is a house that fills almost the whole block, a narrow side setback and a courtyard where the backyard used to be.

Land banking makes it worse

Land banking is when land with development potential is held undeveloped for years, or released slowly, while its value rises. Developers argue they need a pipeline of land for future stages. The effect, though, is less land on the market and higher prices for what is released.

In February 2025 the federal government announced it would crack down on land banking by foreign investors, saying foreign buyers of vacant land must put it to productive use within reasonable timeframes (Treasury media release, 16 February 2025).

That's a good start, but the same principle should apply to domestic developers. Weak rules on how long land can sit undeveloped allow land banking to continue, and families pay for it.

What smaller blocks cost families

Outdoor space for kids and pets

Kids need somewhere to kick a ball, build a cubby and get muddy without being driven to a park. Dogs need room to run. On a lot where the house takes up most of the land, the "yard" is often a strip of turf beside the alfresco. Parks help, but they're not the same as sending the kids out the back door.

Storage and parking

Smaller lots usually mean narrow frontages. That means a single or tandem garage, less room for bins, bikes, the trailer and the boat, and cars parked in the street. Garages often end up as storage rooms because the house has nowhere else to put things.

Privacy, noise and heat

With small side setbacks you're looking straight into your neighbour's windows, hearing their air conditioner and losing the breezes that keep a Queensland home comfortable. Less room for trees and gardens also means hotter streets.

Room to adapt

Families change. Grandparents move in, teenagers need space, someone works from home. A larger lot gives you options to extend or add a secondary dwelling later. A tight lot built to its limits gives you very few.

What needs to change

  • Release more land that is suitable for families, not just the smallest lot that fits.
  • Put time limits on undeveloped land with development approval, for domestic developers as well as foreign investors.
  • Plan for private open space that is actually usable, not just a minimum area on paper.
  • Make sure infrastructure keeps up, including parks, schools and roads, when density goes up.

What you can do before you buy

You can't change planning policy on your own, but you can avoid buying the wrong block:

  • Check the lot size and the frontage, not just the price. Frontage drives the house width and garage options more than area does.
  • Read the building envelope plan and estate covenants. They set setbacks, site cover, minimum house sizes, fencing and facade rules, and can rule out the design you want.
  • Work out the private open space you'll actually have once the house is on the block. Sketch it out with the trampoline, clothesline, bins and the dog.
  • Check whether small-lot rules apply. Different siting rules can apply on small lots, which affects how close you and your neighbours can build.
  • Look at what's planned around you, such as future stages, parks and roads.
  • Compare like with like. A slightly dearer lot that fits your family can be better value than a cheap one you outgrow in five years.

My free Before Buying Land checklist (C1) at constructor.net.au/checklists walks you through what to check before you sign a land contract.

The bottom line

Smaller blocks aren't going away, and for some people they're the right choice. But families need space, and when the whole system is set up to squeeze lots smaller, it's buyers who wear the cost. Know what you're buying, and keep pushing for land policy that puts liveability ahead of yield.