Avondale vs Marshall Mount, true annual running costs compared 2026
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Avondale and Marshall Mount are both Wollongong rates (OLG suburbs, sitting 83.2 km and 86.9 km from Sydney CBD respectively, and are commonly compared by buyers weighing up running costs within the same council area.
Avondale runs $512 a year cheaper than Marshall Mount, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $5,870.
Over 10 years the gap between these two is about $5,900, about $11 a week, and most of it is the AI-estimated insurance line.
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Marshall Mount
Annual cost breakdown
| Category | Avondale | Marshall Mount | Difference |
|---|---|---|---|
| Council rates Official, 2026-27 | $1,819 | $1,819 | - |
| Water & sewerage Official, 2026-27 | $1,548 | $1,548 | - |
| Commute (driving) Modelled, 2026-27 | $3,634 | $3,796 | -$162 |
| Commute (public transport) Modelled, 2026-27 | $2,400 | $2,400 | - |
| Home insurance Estimated | $1,500 | $1,850 | -$350 |
| Body corporate (unit) Estimated | $1,800 | $1,800 | - |
| Total (driving) | $8,501 | $9,013 | -$512 |
| Total (public transport) | $7,267 | $7,617 | -$350 |
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 | Avondale | Marshall Mount | Difference |
|---|---|---|---|
| House | $2,442 | $2,442 | - |
| Unit | $2,001 | $2,001 | - |
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, Avondale vs Marshall Mount (2026-27)
What the numbers show
Avondale and Marshall Mount differ by $512 a year by car, but $350 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 $162, so neither suburb is named cheaper here.
The biggest single gap is home insurance at $350 per year. Marshall Mount carries medium flood risk, which pushes estimated premiums higher.
On public transport the gap is $350 per year, $7,267 from Avondale versus $7,617 from Marshall Mount.
Where the difference actually comes from
- Council rates is identical at $1,819 a year.
- Water and sewerage is identical at $1,548 a year.
- Driving commute favours Avondale by $162 a year, $3,634 against $3,796.
- Building insurance favours Avondale by $350 a year, $1,500 against $1,850.
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 Marshall Mount against low in Avondale, which feeds the insurance estimate.
10-year cumulative cost projection
| Year | Avondale cumulative | Marshall Mount cumulative | Difference |
|---|---|---|---|
| Year 1 | $8,501 | $9,013 | $512 |
| Year 3 | $26,276 | $27,858 | $1,582 |
| Year 5 | $45,133 | $47,851 | $2,718 |
| Year 10 | $97,454 | $103,324 | $5,870 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Avondale or Marshall Mount cheaper to live in?
Neither is named cheaper. Avondale runs $8,501 a year by car and Marshall Mount $9,013, but most of the $512 difference is the building insurance estimate rather than a published figure. On council rates, water and the commute, which are sourced, the gap is $162. Source: SuburbCost 2026 data.
What are council rates in Avondale and Marshall Mount?
Annual council rates for a house are $1,819 in Avondale (Wollongong rates (OLG) and $1,819 in Marshall Mount (Wollongong rates (OLG). Water and sewerage adds $1,548 in Avondale and $1,548 in Marshall Mount. 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 Avondale and Marshall Mount?
Annual driving commute costs are $3,634 from Avondale and $3,796 from Marshall Mount to Sydney CBD (ATO 91c/km). Public transport costs $2,400 from Avondale and $2,400 from Marshall Mount.
What is the 10-year cost difference between Avondale and Marshall Mount?
At 3% annual cost growth, Avondale costs a cumulative $97,454 and Marshall Mount costs $103,324 over 10 years by car. The cumulative difference is $5,870 in favour of Avondale. Excludes purchase price, mortgage, and personal expenses.
Which of Avondale and Marshall Mount suits you better?
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Sources: Wollongong rates (OLG and Wollongong 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.