Diamond Beach vs Koorainghat: true annual running costs compared (2026)
Last updated July 2026 · council rates current NSW schedules, ATO 88c/km, Opal & Translink fares, AER electricity benchmarks
Diamond Beach and Koorainghat are both Mid-Coast rates (OLG suburbs, sitting 239.7 km and 240.4 km from Sydney CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
Koorainghat runs $1,100 a year cheaper than Diamond Beach, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $12,610.
Over 10 years, Koorainghat costs about $12,600 less to run than Diamond Beach — the same as paying $12,600 less for the home. It's the cost no listing shows you.
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Koorainghat
Annual cost breakdown
| Category | Diamond Beach | Koorainghat | Difference |
|---|---|---|---|
| Council rates | $1,609 | $1,609 | - |
| Water & sewerage | $1,300 | $1,300 | - |
| Commute (driving) | $17,600 | $17,600 | - |
| Commute (public transport) | $2,400 | $2,400 | - |
| Home insurance | $3,500 | $2,400 | +$1,100 |
| Body corporate (unit) | $1,500 | $1,500 | - |
| Total (driving) | $24,009 | $22,909 | +$1,100 |
| Total (public transport) | $8,809 | $7,709 | +$1,100 |
Green = cheaper. Commute: ATO 88c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Diamond Beach | Koorainghat | Difference |
|---|---|---|---|
| House | $2,148 | $2,148 | - |
| Unit | $1,716 | $1,716 | - |
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 — Diamond Beach vs Koorainghat (2026-27)
What the numbers show
Koorainghat costs $1,100 less per year to run by car. Held over ten years at 3% annual cost growth, that gap compounds to $12,610 in favour of Koorainghat.
The biggest single gap is home insurance at $1,100 per year. Diamond Beach carries high flood risk, which pushes estimated premiums higher.
On public transport the gap is $1,100 per year, $8,809 from Diamond Beach versus $7,709 from Koorainghat.
10-year cumulative cost projection
| Year | Diamond Beach cumulative | Koorainghat cumulative | Difference |
|---|---|---|---|
| Year 1 | $24,009 | $22,909 | $1,100 |
| Year 3 | $74,209 | $70,809 | $3,400 |
| Year 5 | $127,467 | $121,627 | $5,840 |
| Year 10 | $275,236 | $262,626 | $12,610 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Diamond Beach or Koorainghat cheaper to live in?
Koorainghat is cheaper to run by car at $22,909 per year versus $24,009 for Diamond Beach, a difference of $1,100 annually. Figures cover council rates, water, commute (ATO 88c/km), and home insurance. Source: SuburbCost 2026 data.
What are council rates in Diamond Beach and Koorainghat?
Annual council rates for a house are $1,609 in Diamond Beach (Mid-Coast rates (OLG) and $1,609 in Koorainghat (Mid-Coast rates (OLG). Water and sewerage adds $1,300 in Diamond Beach and $1,300 in Koorainghat. 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 Diamond Beach and Koorainghat?
Annual driving commute costs are $17,600 from Diamond Beach and $17,600 from Koorainghat to Sydney CBD (ATO 88c/km). Public transport costs $2,400 from Diamond Beach and $2,400 from Koorainghat.
What is the 10-year cost difference between Diamond Beach and Koorainghat?
At 3% annual cost growth, Diamond Beach costs a cumulative $275,236 and Koorainghat costs $262,626 over 10 years by car. The cumulative difference is $12,610 in favour of Koorainghat. Excludes purchase price, mortgage, and personal expenses.
Which of Diamond Beach and Koorainghat 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: Mid-Coast rates (OLG and Mid-Coast rates (OLG 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.