Diamond Beach vs Koorainghat: true annual running costs compared (2026)
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Diamond Beach and Koorainghat are both Mid-Coast rates (OLG suburbs, 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 $12,611.
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.
Get the free report: 10-year costs, flood & fire risk, crime, schools and overall verdict →Diamond Beach
Koorainghat
Annual cost breakdown
| Category | Diamond Beach | Koorainghat | Difference |
|---|---|---|---|
| Council rates | $1,609 | $1,609 | - |
| Water & sewerage | $1,300 | $1,300 | - |
| Commute (driving) | $18,200 | $18,200 | - |
| Commute (public transport) | $2,400 | $2,400 | - |
| Home insurance | $3,500 | $2,400 | +$1,100 |
| Body corporate (unit) | $1,500 | $1,500 | - |
| Total (driving) | $24,609 | $23,509 | +$1,100 |
| Total (public transport) | $8,809 | $7,709 | +$1,100 |
Green = cheaper. Commute: ATO 91c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Diamond Beach | Koorainghat | Difference |
|---|---|---|---|
| House | $2,827 | $2,827 | - |
| Unit | $2,369 | $2,369 | - |
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 — 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 $12,611 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.
Where the difference actually comes from
- Council rates is identical at $1,609 a year.
- Water and sewerage is identical at $1,300 a year.
- Driving commute is identical at $18,200 a year.
- Building insurance favours Koorainghat by $1,100 a year, $2,400 against $3,500.
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 the insurance band.
Flood risk is rated high in Diamond Beach against low in Koorainghat, which feeds the insurance estimate.
10-year cumulative cost projection
| Year | Diamond Beach cumulative | Koorainghat cumulative | Difference |
|---|---|---|---|
| Year 1 | $24,609 | $23,509 | $1,100 |
| Year 3 | $76,064 | $72,664 | $3,400 |
| Year 5 | $130,653 | $124,812 | $5,841 |
| Year 10 | $282,115 | $269,504 | $12,611 |
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 $23,509 per year versus $24,609 for Diamond Beach, a difference of $1,100 annually. Figures cover council rates, water, commute (ATO 91c/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?
Diamond Beach carries a flat regional driving allowance of $18,200, about 20,000 km of household driving a year, because it is more than 100 km from Sydney CBD. Koorainghat carries a flat regional driving allowance of $18,200, about 20,000 km of household driving a year, because it is more than 100 km from Sydney CBD. 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 $282,115 and Koorainghat costs $269,504 over 10 years by car. The cumulative difference is $12,611 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.
Related comparisons
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 91c/km, and SuburbCost AI insurance estimates. Data updated July 2026.