Census Night Is Coming: Here's What It Reveals About Life in Sydney's Apartments

Census night is Tuesday 11 August, and if you live in an apartment, this one counts more than you might think.

Every five years, the Australian Bureau of Statistics (ABS) counts every person and every home in the country. It sounds like a bureaucratic exercise, and sure, there's a form involved, but the data that comes out of it shapes everything from where new train stations get built to how much funding your local council receives for parks, footpaths, and community services. If you've ever wondered why your suburb got a new playground or why a bus route was extended, there's a good chance Census data was behind that decision.

For those of us living in strata, the Census paints a fascinating picture of who we are, how we live, and where apartment living in Sydney is heading next.

Sydney: Australia's Apartment Capital

Let's start with the numbers, because they're genuinely striking.

About 45 per cent of all Australians who live in high-rise apartments live right here in Greater Sydney. That's roughly 247,000 people across nearly 120,000 apartments in buildings of nine storeys or more. The 2021 Census was actually the first time the ABS counted building height and Sydney came out on top by a wide margin.

Zoom out a little further and the picture gets even bigger. Across NSW, there are now over 1.07 million strata lots, and approximately 1.28 million people live in private apartments. Nationally, 4.2 million Australians or about 15 per cent of the population call a strata property home. That's up 200,000 in just two years.

Sydney's apartment share has grown from 10.2 per cent of all dwellings in 2011 to 16.7 per cent by 2021. That's not a slow drift. That's a structural shift in how an entire city lives.

	Greater Sydney	City of Sydney LGA
Median age	37	34
People per household	2.7	1.9
Renting privately	30.4%	53.7%
Bachelor degree or above	33.3%	52.6%
Lone person households	23.2%	41.1%
Cars per dwelling	1.7	0.8

So Who Actually Lives in These Buildings?

Here's where it gets interesting and where a few myths start to fall apart.

The old assumption was that apartments are for young singles who eventually "graduate" to a house in the suburbs. And yes, 47 per cent of apartment residents in NSW are aged 20 to 39. But that's only part of the story.

One in four apartments in Greater Sydney is home to a family with children. That's not a niche trend. That's hundreds of thousands of kids growing up in strata communities, using shared lifts, playing in communal courtyards, and relying on nearby parks because they don't have a backyard.

Then there's the cultural picture. In NSW apartments, only 41 per cent of residents were born in Australia, and less than half speak English at home. Walk through the lobby of almost any Sydney apartment building and you'll hear Mandarin, Arabic, Vietnamese, Hindi, Korean, sometimes all before you reach the lift. It's one of the things that makes apartment living in this city genuinely unique.

And the lone-person household is now the single most common household type in NSW apartments at 35 per cent. In the City of Sydney, it's a staggering 41 per cent. These aren't just students. They're professionals, retirees, divorcees, and people who simply prefer living solo in a well-connected location.

The Practical Side: Census in a Secure Building

If you live in a building with security access, you might be wondering how the Census actually works.

Most residents will receive a letter in the mail with instructions to complete the Census online. Easy enough. But after Census night, ABS field staff may need to follow up with households that haven't responded and that means they'll need access to your building.

Under the Census and Statistics Act 1905, authorised Census officers can enter secure apartment buildings. The ABS works with strata managers and building managers ahead of time to arrange access, typically between 8am and 8pm on weekdays. All keys and fobs provided are managed under strict protocols and returned once Census activities wrap up (usually by the end of September).

Reminder: the Census is compulsory. Fines can reach $364 per day for non-completion. So whether you do it online the moment your letter arrives or on the night itself, just make sure it gets done.

Looking Ahead: What Will the 2027 Data Tell Us?

The first release of 2026 Census data is expected in June 2027. Based on the trends we've been tracking, here's what we expect to see, and what apartment owners and strata committees should be watching for:

• More apartments, more people in them. The number of occupied apartments grew by more than 20 per cent in the five years to 2021. With Sydney's underlying demand requiring 16,000 to 19,000 new apartments per year, and forecast supply sitting at just 10,000, It's expected the 2026 data to show even greater density and occupancy pressure.

• The "forever apartment" is becoming real. As house prices remain out of reach for many (Sydney's median house price is tracking toward $1.9 million), more families and older Australians are treating apartments as permanent homes rather than temporary stops. The Census will show whether household composition in apartments is shifting meaningfully e.g. more kids, more retirees, fewer transient renters.

• Commuting patterns will reshape building amenities. If active transport surges (walking, cycling, e-bikes), strata schemes will face growing pressure to provide secure bike storage, e-bike charging stations, and end-of-trip facilities. The data may give committees the evidence they need to justify capital works in these areas.

• Diversity data will matter for community building. With expanded ancestry questions and new demographic categories, committees will have a richer understanding of who lives in their buildings. That's useful for everything from communication strategies to event planning to ensuring by-laws are culturally sensitive.

Why It Matters for Your Building

At the end of the day, the Census is a tool. The data it produces shapes where governments spend money, where developers build, and how services are delivered to your neighbourhood. Every apartment that gets counted accurately is a vote for better infrastructure, better planning, and better outcomes for high-density communities.

As Sydney's apartment sector continues to grow, well-managed buildings with proactive committees and sound governance will stand apart. Compass Strata works alongside owners corporations to stay ahead of these changes, strengthen building performance, and plan with confidence for whatever the data reveals next. If you'd like to see how we can support your scheme, get in touch today.