Birrong vs Sefton: true annual running costs compared (2026)
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Birrong and Sefton are both Canterbury-Bankstown rates (OLG suburbs, sitting 17.5 km and 18.4 km from Sydney CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
Birrong runs $623 a year cheaper than Sefton, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $7,142.
Over 10 years these two cost about the same to run. The difference here isn't money — it's location, schools and lifestyle.
Get the free report: 10-year costs, flood & fire risk, crime, schools and overall verdict →Birrong
Sefton
Annual cost breakdown
| Category | Birrong | Sefton | Difference |
|---|---|---|---|
| Council rates | $1,377 | $1,377 | - |
| Water & sewerage | $1,548 | $1,548 | - |
| Commute (driving) | $4,778 | $4,951 | -$173 |
| Commute (public transport) | $2,386 | $2,386 | - |
| Home insurance | $1,850 | $2,300 | -$450 |
| Body corporate (unit) | $2,300 | $2,300 | - |
| Total (driving) | $9,553 | $10,176 | -$623 |
| Total (public transport) | $7,161 | $7,611 | -$450 |
Green = cheaper. Commute: ATO 91c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Birrong | Sefton | Difference |
|---|---|---|---|
| House | $2,342 | $2,342 | - |
| Unit | $1,909 | $1,909 | - |
Estimated from AER residential benchmarks for each suburb's climate zone at 2026-27 regulated prices for each suburb's electricity network, including supply charge (AER Default Market Offer caps, or the QCA price in regional Queensland; unit ≈ 75% of a house). Get the free report for a breakdown by your exact number of occupants.
Cost breakdown chart
Annual cost breakdown — Birrong vs Sefton (2026-27)
What the numbers show
Birrong costs $623 less per year to run by car. Held over ten years at 3% annual cost growth, that gap compounds to $7,142 in favour of Birrong.
The biggest single gap is home insurance at $450 per year. Sefton carries medium flood risk, which pushes estimated premiums higher.
On public transport the gap is $450 per year, $7,161 from Birrong versus $7,611 from Sefton.
Where the difference actually comes from
- Council rates is identical at $1,377 a year.
- Water and sewerage is identical at $1,548 a year.
- Driving commute favours Birrong by $173 a year, $4,778 against $4,951.
- Building insurance favours Birrong by $450 a year, $1,850 against $2,300.
Both suburbs sit in the same council area, so the rates line is identical and none of the difference between them comes from council. What separates them is commute distance and the insurance band.
Flood risk is rated medium in Sefton against low in Birrong, which feeds the insurance estimate. The catchment state school scores 6.7 in Sefton against 5.2 in Birrong, on ACARA's ICSEA percentile scaled to ten.
10-year cumulative cost projection
| Year | Birrong cumulative | Sefton cumulative | Difference |
|---|---|---|---|
| Year 1 | $9,553 | $10,176 | $623 |
| Year 3 | $29,527 | $31,453 | $1,926 |
| Year 5 | $50,718 | $54,026 | $3,308 |
| Year 10 | $109,514 | $116,656 | $7,142 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Birrong or Sefton cheaper to live in?
Birrong is cheaper to run by car at $9,553 per year versus $10,176 for Sefton, a difference of $623 annually. Figures cover council rates, water, commute (ATO 91c/km), and home insurance. Source: SuburbCost 2026 data.
What are council rates in Birrong and Sefton?
Annual council rates for a house are $1,377 in Birrong (Canterbury-Bankstown rates (OLG) and $1,377 in Sefton (Canterbury-Bankstown rates (OLG). Water and sewerage adds $1,548 in Birrong and $1,548 in Sefton. Both figures are the average residential rate reported to the Office of Local Government, uplifted by each council's IPART rate peg.
How does the commute cost compare between Birrong and Sefton?
Annual driving commute costs are $4,778 from Birrong and $4,951 from Sefton to Sydney CBD (ATO 91c/km). Public transport costs $2,386 from Birrong and $2,386 from Sefton.
What is the 10-year cost difference between Birrong and Sefton?
At 3% annual cost growth, Birrong costs a cumulative $109,514 and Sefton costs $116,656 over 10 years by car. The cumulative difference is $7,142 in favour of Birrong. Excludes purchase price, mortgage, and personal expenses.
Which of Birrong and Sefton is best to actually live in?
You've got the costs. Get the free personalised report for the rest: a clear verdict on which suburb wins, the full flood, fire and crime risk profile, nearest schools, estimated electricity cost by number of occupants, and your own loan or rent stress-tested over 10 years. No spam.
Related comparisons
Sources: Canterbury-Bankstown rates (OLG and Canterbury-Bankstown rates (OLG rate data, water utility pricing (QLD: Queensland Urban Utilities / Unitywater; NSW: Sydney Water / Hunter Water), ATO 91c/km, and SuburbCost AI insurance estimates. Data updated July 2026.