Castlereagh vs Yellow Rock, true annual running costs compared 2026
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Castlereagh (Penrith rates (OLG) and Yellow Rock (Blue Mountains rates (OLG) attract comparison from buyers considering suburbs across different council areas at similar distances from Sydney CBD (53.8 km and 55.9 km).
The two sit within $131 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 the gap between these two is about $1,500, about $3 a week, and most of it is the AI-estimated insurance line.
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Yellow Rock
Annual cost breakdown
| Category | Castlereagh | Yellow Rock | Difference |
|---|---|---|---|
| Council rates Official, 2026-27 | $1,604 | $2,157 | -$553 |
| Water & sewerage Official, 2026-27 | $1,548 | $1,548 | - |
| Commute (driving) Modelled, 2026-27 | $6,157 | $5,885 | +$272 |
| Commute (public transport) Modelled, 2026-27 | $2,400 | $2,400 | - |
| Home insurance Estimated | $2,100 | $1,950 | +$150 |
| Body corporate (unit) Estimated | $2,100 | $2,100 | - |
| Total (driving) | $11,409 | $11,540 | -$131 |
| Total (public transport) | $7,652 | $8,055 | -$403 |
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 | Castlereagh | Yellow Rock | Difference |
|---|---|---|---|
| House | $2,720 | $2,720 | - |
| Unit | $2,209 | $2,209 | - |
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, Castlereagh vs Yellow Rock (2026-27)
What the numbers show
Castlereagh and Yellow Rock differ by $131 a year by car, but $150 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 $281, so neither suburb is named cheaper here.
The biggest single gap is council rates at $553 per year.
On public transport the gap is $403 per year, $7,652 from Castlereagh versus $8,055 from Yellow Rock.
Where the difference actually comes from
- Council rates favours Castlereagh by $553 a year, $1,604 against $2,157.
- Water and sewerage is identical at $1,548 a year.
- Driving commute favours Yellow Rock by $272 a year, $5,885 against $6,157.
- Building insurance favours Yellow Rock by $150 a year, $1,950 against $2,100.
They sit in different council areas, so the rates line is set by two different councils. For NSW that figure is the average residential rate reported to the Office of Local Government, uplifted by that council's IPART rate peg.
Flood risk is rated medium in Castlereagh against low in Yellow Rock, which feeds the insurance estimate. Fire risk is rated high in Yellow Rock against medium in Castlereagh, which feeds the insurance estimate. The catchment state school scores 7.3 in Yellow Rock against 5.2 in Castlereagh, on ACARA's ICSEA percentile scaled to ten.
10-year cumulative cost projection
| Year | Castlereagh cumulative | Yellow Rock cumulative | Difference |
|---|---|---|---|
| Year 1 | $11,409 | $11,540 | $131 |
| Year 3 | $35,264 | $35,669 | $405 |
| Year 5 | $60,572 | $61,267 | $695 |
| Year 10 | $130,791 | $132,293 | $1,502 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Castlereagh or Yellow Rock cheaper to live in?
Neither is named cheaper. Castlereagh runs $11,409 a year by car and Yellow Rock $11,540, but most of the $131 difference is the building insurance estimate rather than a published figure. On council rates, water and the commute, which are sourced, the gap is $281. Source: SuburbCost 2026 data.
What are council rates in Castlereagh and Yellow Rock?
Annual council rates for a house are $1,604 in Castlereagh (Penrith rates (OLG) and $2,157 in Yellow Rock (Blue Mountains rates (OLG). Water and sewerage adds $1,548 in Castlereagh and $1,548 in Yellow Rock. 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 Castlereagh and Yellow Rock?
Annual driving commute costs are $6,157 from Castlereagh and $5,885 from Yellow Rock to Sydney CBD (ATO 91c/km). Public transport costs $2,400 from Castlereagh and $2,400 from Yellow Rock.
What is the 10-year cost difference between Castlereagh and Yellow Rock?
At 3% annual cost growth, Castlereagh costs a cumulative $130,791 and Yellow Rock costs $132,293 over 10 years by car. The cumulative difference is $1,502 in favour of Castlereagh. Excludes purchase price, mortgage, and personal expenses.
Which of Castlereagh and Yellow Rock suits you better?
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Sources: Penrith rates (OLG and Blue Mountains 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.