Fresh data from Cotality has put a number on something Sydney families have long felt: the right school catchment can add a seven-figure sum to a home’s value. Homes inside the city’s most sought-after public high-school catchments are now worth roughly $1 million or more than comparable houses just across the boundary.
That is a large premium to weigh up, and this guide covers what it is, where it is largest, why families pay it, and how it compares with private school fees.
The Premium in Numbers
Cotality’s mid-2026 analysis compared property values inside popular public high-school catchments with comparable homes in the same suburbs, just outside the zone. The results put the school-zone premium in plain view.
In the Rose Bay and Randwick catchment, the median house value inside the zone was $4,339,810, against $2,783,174 outside, a gap of roughly $1.56 million. In the Killara and Lindfield catchment, the median sat at $3,805,422 inside and $2,763,611 outside, a difference of about $1.04 million.
On a comparable-homes basis, Cotality’s custom boundary analysis found the largest Sydney price gap at nearly $1.3 million, or 39.8%, in the combined North Shore catchments of Killara High, Willoughby Girls and Lindfield Learning Village, a different measure from the raw gaps above.
Why Families Pay for a Guaranteed School Place
Part of the reason is certainty. Under NSW Department of Education policy, children living inside a state school catchment are guaranteed a place at that school. For a family planning years ahead, an in-zone address removes the guesswork from enrolment.
The premium is also anchored by results. Rose Bay Secondary College, Epping Boys High School and Killara High School sit among NSW’s highest-ranking non-selective state schools by ATAR, which concentrates buyer interest in the eastern suburbs and on the North Shore.
High-school demand tends to run on academic results. Primary-school demand is different: it leans on reputation, walkability and community feel rather than ATAR rankings. Both still pull families toward a specific address.
The Private School Maths
The school-zone premium looks more reasonable when you set it against private school fees. Futurity Invest estimated the average cost of 13 years of private education in Australia at $349,000 in 2022, and Sydney runs higher. Some leading Sydney private schools charge upwards of $46,000 a year, which puts secondary school alone at around $276,000 per child.
A catchment home is a one-off cost rather than a recurring bill. In six of the nine regions Cotality analysed, the in-zone house premium was at least $100,000. Cotality quantitative analyst Irene Kang framed the trade-off simply: a good state school catchment can deliver decent returns from both a housing and educational perspective.
Unlike school fees, which tend to rise, mortgage repayments often ease in real terms over time. For many families, that makes the location premium the cheaper long-run option.
Primary Schools and the Lifestyle Effect
Primary schools tell the same story, but for different reasons. Elizabeth and Sam Newton paid roughly a $400,000 premium to live near Boronia Park Public School. They sold for $1.8 million outside the catchment and bought near the school for $2.2 million about eight years ago. Their decision was about walkability, community and word-of-mouth reputation rather than ATAR tables.
You can see that competition on the ground. At 22 Bimbil Avenue, Mount Colah, five registered bidders traded 38 bids before a young family won the keys, drawn by the block size and walking access to cafes, the train station and a primary school. Mount Colah’s median house price is $1.7 million, up 6% over six months.
At the prestige end, 12 Tenilba Road, Northbridge sold as a street record above $6 million, with Northbridge five-bedroom houses holding a $5,938,000 median over the prior year.
Where Demand Is Flowing
School-driven demand is also changing where buyers look. Data from Excel Academics, matched to high-demand suburbs, found NSW had the most schools in the national top 20. Selective Caringbah High School draws about 3,400 buyers searching south of Sydney, while Smiths Hill High in Wollongong has fuelled a local surge in buyer demand.
Sydney’s wider market adds context. Rosebery recorded a 233% year-on-year jump in buyer enquiries per listing, while Sydney’s median house price sits at $1.58 million, within 2.5% of its record.
Developers are responding too. The Boronia project in Roseville markets school and rail proximity, with three-bedders from $2.49 million, penthouses from $2.85 million and four-bedroom sky homes from $4.5 million, close to Roseville College, Pymble Ladies’ College and Knox Grammar.
Not Every Catchment Carries a Premium
None of this means every good school adds value. Of the nine catchment clusters Cotality analysed across Sydney and Melbourne, seven had higher median house values than out-of-catchment homes, which leaves two that did not.
Cherrybrook Technology High School is the clearest example. Homes in its catchment were $155,000 lower than comparable homes outside the catchment in the same suburbs, likely because more Hills District families choose private schools.
Capital growth tells a similar story. North Shore catchment homes recorded 126.0% growth over 15 years, compared with 150.3% in neighbouring out-of-catchment markets.
Catchment boundaries are also reviewed over time to reflect housing activity, demographics, enrolment projections and planned development, so checking the current boundary belongs in every buying decision.
Conclusion
The school-zone premium is real, and it shows up most clearly on the North Shore and in the eastern suburbs. But it is one factor among many. Weigh the one-off location premium against recurring private-school fees, confirm the current boundary for any address, and look at value on both sides of the line.
A school-friendly address can serve everyday family life and long-term property goals at the same time. If you are weighing a catchment move, a local Stone Real Estate team can help you work through the numbers.
Frequently Asked Questions
How much more do Sydney families pay to live in a top school catchment?
The gap ranges from six figures to well over $1 million. Cotality’s data to June 2026 shows the Rose Bay and Randwick catchment with a roughly $1.56 million difference between in-zone and out-of-zone median house values, and Killara and Lindfield with about $1.04 million. On a comparable-homes basis, the largest Sydney premium is nearly $1.3 million, or 39.8%, in the combined North Shore catchment.
What are the biggest Sydney school zone price gaps in 2026?
Two stand out in the raw median comparison. In the Rose Bay and Randwick catchment, the median house value was $4,339,810 inside the zone against $2,783,174 outside. In the Killara and Lindfield catchment, the median was $3,805,422 inside and $2,763,611 outside. Both show in-zone medians roughly $1 million or more above comparable homes just beyond the boundary. On a comparable-homes basis, Cotality’s custom analysis puts the largest Sydney premium at nearly $1.3 million, or 39.8%, in the combined North Shore catchment.
Is buying in a public school catchment cheaper than private school fees?
Often yes over the long run. Thirteen years of private education was estimated at $349,000 nationally in 2022, and more in Sydney, where leading private schools charge upwards of $46,000 a year. In six of the nine regions Cotality analysed, the in-zone house premium was at least $100,000. That is a one-off cost against recurring fees that rise each year, and mortgage repayments tend to ease in real terms. For a family with two or three children, the location premium can compare well with tuition.
Do you have to live in the catchment to enrol at a NSW public school?
Not always, but it helps. Under NSW Department of Education policy, children living inside a state school catchment are guaranteed a place at that school. Families outside the zone can still apply, but enrolment then depends on capacity and other criteria. An in-zone address provides certainty, which is why families plan years ahead and treat the boundary as part of the buying brief. If a guaranteed place matters, confirm the current boundary for any address you are considering.
Can school catchment boundaries change?
Yes. Boundaries are reviewed over time and can shift with housing activity, demographic change, enrolment projections and planned development. A home inside a zone today is not guaranteed to stay inside forever, so confirm the current boundary for a specific address rather than relying on older maps or suburb reputation alone.
Which Sydney suburbs have the strongest school-driven demand?
Caringbah High School draws about 3,400 buyers searching south of Sydney, and Smiths Hill High in Wollongong has fuelled a local surge in demand. On the ground, Mount Colah saw a 38-bid family-home auction and a $1.7 million median up 6% in six months. Rosebery recorded a 233% year-on-year jump in buyer enquiries per listing. These pockets show school reputation converting into measurable buyer interest.
Does a school zone premium guarantee stronger capital growth?
Not necessarily. On the North Shore, in-zone homes grew 126.0% over 15 years, while neighbouring out-of-catchment markets grew 150.3%. Of the seven premium catchments Cotality analysed, six recorded lower long-term growth than surrounding areas. Demand is spilling over the boundary as in-zone affordability stretches, so value can exist on both sides of the line. A premium today is not the same as faster growth tomorrow.
Why is Cherrybrook Technology High School different?
Cherrybrook Technology High is well regarded and long established, yet homes in its catchment were $155,000 lower than comparable out-of-catchment homes in the same suburbs. Cotality points to the Hills District, where a higher share of families choose private schools, which softens the in-zone premium. It is a useful reminder that a strong school does not automatically translate into a price premium. Local schooling preferences matter as much as the school’s reputation.
What should families look for in a school-friendly suburb?
Start with the current catchment boundary, then look at walkability to the school, public transport links and block sizes that suit family homes. For primary schools, local word-of-mouth reputation often matters more than any ranking. Comparing both sides of a boundary can reveal where the premium sits and where value lies nearby. It also pays to check how an area’s family infrastructure, such as parks and cafes, supports the day-to-day routine.
Are selective schools like Caringbah High linked to catchment premiums?
Selective schools enrol by test rather than catchment, so they do not create a catchment premium in the same way as a local comprehensive school. Still, strong results draw buyers to the surrounding area. Caringbah High attracts about 3,400 buyers searching south of Sydney, and Smiths Hill High has lifted local demand in Wollongong. The effect is more about desirability of the wider suburb than a strict boundary line.