Ilarwill vs South Arm: true annual running costs compared (2026)
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Ilarwill and South Arm are both Clarence Valley rates (OLG suburbs, and are commonly compared by buyers weighing up running costs within the same council area.
South Arm runs $400 a year cheaper than Ilarwill, driven mostly by home insurance. Over 10 years at 3% growth that gap compounds to about $4,586.
Over 10 years these two cost about the same to run. The difference here isn't money — it's location, schools and lifestyle.
Get the free report: 10-year costs, flood & fire risk, crime, schools and overall verdict →Ilarwill
South Arm
Annual cost breakdown
| Category | Ilarwill | South Arm | Difference |
|---|---|---|---|
| Council rates | $1,439 | $1,439 | - |
| Water & sewerage | $1,300 | $1,300 | - |
| Commute (driving) | $18,200 | $18,200 | - |
| Commute (public transport) | $2,400 | $2,400 | - |
| Home insurance | $3,500 | $3,100 | +$400 |
| Body corporate (unit) | $1,500 | $1,500 | - |
| Total (driving) | $24,439 | $24,039 | +$400 |
| Total (public transport) | $8,639 | $8,239 | +$400 |
Green = cheaper. Commute: ATO 91c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Ilarwill | South Arm | Difference |
|---|---|---|---|
| House | $2,774 | $2,774 | - |
| Unit | $2,329 | $2,329 | - |
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 — Ilarwill vs South Arm (2026-27)
What the numbers show
South Arm costs $400 less per year to run by car. Held over ten years at 3% annual cost growth, that gap compounds to $4,586 in favour of South Arm.
The biggest single gap is home insurance at $400 per year. Ilarwill carries high flood risk, which pushes estimated premiums higher.
On public transport the gap is $400 per year, $8,639 from Ilarwill versus $8,239 from South Arm.
Where the difference actually comes from
- Council rates is identical at $1,439 a year.
- Water and sewerage is identical at $1,300 a year.
- Driving commute is identical at $18,200 a year.
- Building insurance favours South Arm by $400 a year, $3,100 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.
Fire risk is rated high in Ilarwill against medium in South Arm, which feeds the insurance estimate. The catchment state school scores 5.4 in South Arm against 3.7 in Ilarwill, on ACARA's ICSEA percentile scaled to ten.
10-year cumulative cost projection
| Year | Ilarwill cumulative | South Arm cumulative | Difference |
|---|---|---|---|
| Year 1 | $24,439 | $24,039 | $400 |
| Year 3 | $75,539 | $74,302 | $1,237 |
| Year 5 | $129,750 | $127,626 | $2,124 |
| Year 10 | $280,166 | $275,580 | $4,586 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Ilarwill or South Arm cheaper to live in?
South Arm is cheaper to run by car at $24,039 per year versus $24,439 for Ilarwill, a difference of $400 annually. Figures cover council rates, water, commute (ATO 91c/km), and home insurance. Source: SuburbCost 2026 data.
What are council rates in Ilarwill and South Arm?
Annual council rates for a house are $1,439 in Ilarwill (Clarence Valley rates (OLG) and $1,439 in South Arm (Clarence Valley rates (OLG). Water and sewerage adds $1,300 in Ilarwill and $1,300 in South Arm. 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 Ilarwill and South Arm?
Ilarwill 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. South Arm 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 Ilarwill and $2,400 from South Arm.
What is the 10-year cost difference between Ilarwill and South Arm?
At 3% annual cost growth, Ilarwill costs a cumulative $280,166 and South Arm costs $275,580 over 10 years by car. The cumulative difference is $4,586 in favour of South Arm. Excludes purchase price, mortgage, and personal expenses.
Which of Ilarwill and South Arm 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: Clarence Valley rates (OLG and Clarence Valley 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.