Castle Cove vs Castlecrag, true annual running costs compared 2026
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Castle Cove and Castlecrag are both Willoughby rates (OLG suburbs, sitting 9.1 km and 7.8 km from Sydney CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
Castlecrag runs $808 a year cheaper than Castle Cove, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $9,262.
Over 10 years the gap between these two is about $9,300, about $18 a week, and most of it is the AI-estimated insurance line.
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Castlecrag
Annual cost breakdown
| Category | Castle Cove | Castlecrag | Difference |
|---|---|---|---|
| Council rates Official, 2026-27 | $1,341 | $1,341 | - |
| Water & sewerage Official, 2026-27 | $1,548 | $1,548 | - |
| Commute (driving) Modelled, 2026-27 | $2,818 | $2,460 | +$358 |
| Commute (public transport) Modelled, 2026-27 | $1,920 | $1,920 | - |
| Home insurance Estimated | $2,600 | $2,150 | +$450 |
| Body corporate (unit) Estimated | $2,600 | $2,600 | - |
| Total (driving) | $8,307 | $7,499 | +$808 |
| Total (public transport) | $7,409 | $6,959 | +$450 |
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 | Castle Cove | Castlecrag | 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, Castle Cove vs Castlecrag (2026-27)
What the numbers show
Castle Cove and Castlecrag differ by $808 a year by car, but $450 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 $358, so neither suburb is named cheaper here.
The biggest single gap is home insurance at $450 per year. Castle Cove carries medium flood risk, which pushes estimated premiums higher.
On public transport the gap is $450 per year, $7,409 from Castle Cove versus $6,959 from Castlecrag.
Where the difference actually comes from
- Council rates is identical at $1,341 a year.
- Water and sewerage is identical at $1,548 a year.
- Driving commute favours Castlecrag by $358 a year, $2,460 against $2,818.
- Building insurance favours Castlecrag by $450 a year, $2,150 against $2,600.
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 Castle Cove against low in Castlecrag, which feeds the insurance estimate.
10-year cumulative cost projection
| Year | Castle Cove cumulative | Castlecrag cumulative | Difference |
|---|---|---|---|
| Year 1 | $8,307 | $7,499 | $808 |
| Year 3 | $25,676 | $23,179 | $2,497 |
| Year 5 | $44,103 | $39,813 | $4,290 |
| Year 10 | $95,230 | $85,968 | $9,262 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Castle Cove or Castlecrag cheaper to live in?
Neither is named cheaper. Castle Cove runs $8,307 a year by car and Castlecrag $7,499, but most of the $808 difference is the building insurance estimate rather than a published figure. On council rates, water and the commute, which are sourced, the gap is $358. Source: SuburbCost 2026 data.
What are council rates in Castle Cove and Castlecrag?
Annual council rates for a house are $1,341 in Castle Cove (Willoughby rates (OLG) and $1,341 in Castlecrag (Willoughby rates (OLG). Water and sewerage adds $1,548 in Castle Cove and $1,548 in Castlecrag. 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 Castle Cove and Castlecrag?
Annual driving commute costs are $2,818 from Castle Cove and $2,460 from Castlecrag to Sydney CBD (ATO 91c/km). Public transport costs $1,920 from Castle Cove and $1,920 from Castlecrag.
What is the 10-year cost difference between Castle Cove and Castlecrag?
At 3% annual cost growth, Castle Cove costs a cumulative $95,230 and Castlecrag costs $85,968 over 10 years by car. The cumulative difference is $9,262 in favour of Castlecrag. Excludes purchase price, mortgage, and personal expenses.
Which of Castle Cove and Castlecrag suits you better?
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Sources: Willoughby rates (OLG and Willoughby 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.