Cow Bay vs Diwan: true annual running costs compared (2026)
Last updated July 2026 · council rates 2026-27 (QLD), ATO 88c/km, Translink fares, AER electricity benchmarks
Cow Bay and Diwan are both Cairns Regional Council suburbs, sitting 85.5 km and 89.5 km from Brisbane CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
The two sit within $232 a year of each other to run, so running cost is a minor factor here — the decision comes down to schools, risk and lifestyle, all in the free report.
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 →Cow Bay
Diwan
Annual cost breakdown
| Category | Cow Bay | Diwan | Difference |
|---|---|---|---|
| Council rates | $1,165 | $1,165 | - |
| Water & sewerage | $1,765 | $1,765 | - |
| Commute (driving) | $3,612 | $3,780 | -$168 |
| Commute (public transport) | $192 | $192 | - |
| Home insurance | $7,200 | $6,800 | +$400 |
| Body corporate (unit) | $1,600 | $1,500 | +$100 |
| Total (driving) | $13,742 | $13,510 | +$232 |
| Total (public transport) | $10,322 | $9,922 | +$400 |
Green = cheaper. Commute: ATO 88c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: minimum residential general rate (QLD).
| Dwelling | Cow Bay | Diwan | Difference |
|---|---|---|---|
| House | $2,218 | $2,218 | - |
| Unit | $1,773 | $1,773 | - |
Estimated from AER residential benchmarks for each suburb's climate zone at 2025 rates (QLD 30c/kWh, NSW 33c/kWh incl. supply charge; unit ≈ 75% of a house). Get the free report for a breakdown by your exact number of occupants.
Cost breakdown chart
Annual cost breakdown — Cow Bay vs Diwan (2026-27)
What the numbers show
Cow Bay and Diwan cost within $232 of each other annually by car. Over ten years with 3% annual growth the gap reaches roughly $2,660, making running cost a minor factor in the decision.
The biggest single gap is home insurance at $400 per year.
On public transport the gap is $400 per year, $10,322 from Cow Bay versus $9,922 from Diwan.
10-year cumulative cost projection
| Year | Cow Bay cumulative | Diwan cumulative | Difference |
|---|---|---|---|
| Year 1 | $13,742 | $13,510 | $232 |
| Year 3 | $42,475 | $41,758 | $717 |
| Year 5 | $72,958 | $71,726 | $1,232 |
| Year 10 | $157,537 | $154,877 | $2,660 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Cow Bay or Diwan cheaper to live in?
Diwan is cheaper to run by car at $13,510 per year versus $13,742 for Cow Bay, a difference of $232 annually. Figures cover council rates, water, commute (ATO 88c/km), and home insurance. Source: SuburbCost 2026 data.
What are council rates in Cow Bay and Diwan?
Annual council rates for a house are $1,165 in Cow Bay (Cairns Regional Council) and $1,165 in Diwan (Cairns Regional Council). Water and sewerage adds $1,765 in Cow Bay and $1,765 in Diwan. Both figures are the minimum residential general rate; properties on higher land value pay more.
How does the commute cost compare between Cow Bay and Diwan?
Annual driving commute costs are $3,612 from Cow Bay and $3,780 from Diwan to Brisbane CBD (ATO 88c/km). Public transport costs $192 from Cow Bay and $192 from Diwan.
What is the 10-year cost difference between Cow Bay and Diwan?
At 3% annual cost growth, Cow Bay costs a cumulative $157,537 and Diwan costs $154,877 over 10 years by car. The cumulative difference is $2,660 in favour of Diwan. Excludes purchase price, mortgage, and personal expenses.
Which of Cow Bay and Diwan 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.
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Sources: Cairns Regional Council and Cairns Regional Council rate data, water utility pricing (QLD: Queensland Urban Utilities / Unitywater; NSW: Sydney Water / Hunter Water), ATO 88c/km, and SuburbCost AI insurance estimates. Data updated July 2026.