Bonnet Bay vs Jannali, true annual running costs compared 2026
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Bonnet Bay and Jannali are both Sutherland rates (OLG suburbs, sitting 21.3 km and 20.9 km from Sydney CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
Jannali runs $866 a year cheaper than Bonnet Bay, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $9,928.
Over 10 years the gap between these two is about $9,900, about $19 a week, and most of it is the AI-estimated insurance line.
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Jannali
Annual cost breakdown
| Category | Bonnet Bay | Jannali | Difference |
|---|---|---|---|
| Council rates Official, 2026-27 | $1,617 | $1,617 | - |
| Water & sewerage Official, 2026-27 | $1,548 | $1,548 | - |
| Commute (driving) Modelled, 2026-27 | $5,461 | $5,395 | +$66 |
| Commute (public transport) Modelled, 2026-27 | $2,400 | $2,400 | - |
| Home insurance Estimated | $2,350 | $1,550 | +$800 |
| Body corporate (unit) Estimated | $2,300 | $2,300 | - |
| Total (driving) | $10,976 | $10,110 | +$866 |
| Total (public transport) | $7,915 | $7,115 | +$800 |
Totals exclude electricity, estimated separately below. Green = cheaper. Commute: ATO 91c/km, 220 working days. Insurance estimated from ACCC premium rates; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Bonnet Bay | Jannali | 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, Bonnet Bay vs Jannali (2026-27)
What the numbers show
Bonnet Bay and Jannali differ by $866 a year by car, but $800 of that is the building insurance estimate rather than a published figure. On the sourced costs, council rates, water and the commute, the gap is $66, so neither suburb is named cheaper here.
The biggest single gap is home insurance at $800 per year. Bonnet Bay carries high flood risk, which pushes estimated premiums higher.
On public transport the gap is $800 per year, $7,915 from Bonnet Bay versus $7,115 from Jannali.
Where the difference actually comes from
- Council rates is identical at $1,617 a year.
- Water and sewerage is identical at $1,548 a year.
- Driving commute favours Jannali by $66 a year, $5,395 against $5,461.
- Building insurance favours Jannali by $800 a year, $1,550 against $2,350.
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 high in Bonnet Bay against low in Jannali, which feeds the insurance estimate.
10-year cumulative cost projection
| Year | Bonnet Bay cumulative | Jannali cumulative | Difference |
|---|---|---|---|
| Year 1 | $10,976 | $10,110 | $866 |
| Year 3 | $33,926 | $31,249 | $2,677 |
| Year 5 | $58,273 | $53,675 | $4,598 |
| Year 10 | $125,828 | $115,900 | $9,928 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Bonnet Bay or Jannali cheaper to live in?
Neither is named cheaper. Bonnet Bay runs $10,976 a year by car and Jannali $10,110, but most of the $866 difference is the building insurance estimate rather than a published figure. On council rates, water and the commute, which are sourced, the gap is $66. Source: SuburbCost 2026 data.
What are council rates in Bonnet Bay and Jannali?
Annual council rates for a house are $1,617 in Bonnet Bay (Sutherland rates (OLG) and $1,617 in Jannali (Sutherland rates (OLG). Water and sewerage adds $1,548 in Bonnet Bay and $1,548 in Jannali. 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 Bonnet Bay and Jannali?
Annual driving commute costs are $5,461 from Bonnet Bay and $5,395 from Jannali to Sydney CBD (ATO 91c/km). Public transport costs $2,400 from Bonnet Bay and $2,400 from Jannali.
What is the 10-year cost difference between Bonnet Bay and Jannali?
At 3% annual cost growth, Bonnet Bay costs a cumulative $125,828 and Jannali costs $115,900 over 10 years by car. The cumulative difference is $9,928 in favour of Jannali. Excludes purchase price, mortgage, and personal expenses.
Which of Bonnet Bay and Jannali suits you better?
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Sources: Sutherland rates (OLG and Sutherland rates (OLG rate data, water utility pricing (QLD: Queensland Urban Utilities / Unitywater; NSW: Sydney Water / Hunter Water), ATO 91c/km, and SuburbCost insurance estimates from ACCC premium rates. Data updated July 2026.