Round Mountain vs Tanglewood: true annual running costs compared (2026)
Last updated July 2026 · council rates current NSW schedules, ATO 91c/km, Opal & Translink fares, AER electricity benchmarks
Round Mountain and Tanglewood are both Tweed rates (OLG suburbs, and are commonly compared by buyers weighing up running costs within the same council area.
The two sit within $0 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.
Round Mountain
Tanglewood
Annual cost breakdown
| Category | Round Mountain | Tanglewood | Difference |
|---|---|---|---|
| Council rates | $1,799 | $1,799 | - |
| Water & sewerage | $1,300 | $1,300 | - |
| Commute (driving) | $18,200 | $18,200 | - |
| Commute (public transport) | $2,400 | $2,400 | - |
| Home insurance | $3,100 | $3,100 | - |
| Body corporate (unit) | $1,500 | $1,500 | - |
| Total (driving) | $24,399 | $24,399 | - |
| Total (public transport) | $8,599 | $8,599 | - |
Green = cheaper. Commute: ATO 91c/km, 220 working days. Insurance AI-estimated; actual premiums vary. Council rates: average residential rate (NSW, IPART-uplifted).
| Dwelling | Round Mountain | Tanglewood | 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 — Round Mountain vs Tanglewood (2026-27)
What the numbers show
Round Mountain and Tanglewood cost within $0 of each other annually by car. Over ten years with 3% annual growth the gap reaches roughly $0, making running cost a minor factor in the decision.
The biggest single gap is council rates at $0 per year.
On public transport the two suburbs cost almost the same, $8,599 and $8,599 a year, so the $0 driving gap nearly closes if you commute by public transport.
Where the difference actually comes from
- Council rates is identical at $1,799 a year.
- Water and sewerage is identical at $1,300 a year.
- Driving commute is identical at $18,200 a year.
- Building insurance is identical at $3,100 a year.
Both suburbs sit in the same council area, so the rates line is identical and none of the difference between them comes from council. On these four costs they are identical.
10-year cumulative cost projection
| Year | Round Mountain cumulative | Tanglewood cumulative | Difference |
|---|---|---|---|
| Year 1 | $24,399 | $24,399 | $0 |
| Year 3 | $75,415 | $75,415 | $0 |
| Year 5 | $129,538 | $129,538 | $0 |
| Year 10 | $279,707 | $279,707 | $0 |
Assumes 3% annual cost growth. Excludes purchase price, mortgage, and personal expenses.
Frequently asked questions
Is Round Mountain or Tanglewood cheaper to live in?
Round Mountain is cheaper to run by car at $24,399 per year versus $24,399 for Tanglewood, a difference of $0 annually. Figures cover council rates, water, commute (ATO 91c/km), and home insurance. Source: SuburbCost 2026 data.
What are council rates in Round Mountain and Tanglewood?
Annual council rates for a house are $1,799 in Round Mountain (Tweed rates (OLG) and $1,799 in Tanglewood (Tweed rates (OLG). Water and sewerage adds $1,300 in Round Mountain and $1,300 in Tanglewood. 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 Round Mountain and Tanglewood?
Round Mountain 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. Tanglewood 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 Round Mountain and $2,400 from Tanglewood.
What is the 10-year cost difference between Round Mountain and Tanglewood?
At 3% annual cost growth, Round Mountain costs a cumulative $279,707 and Tanglewood costs $279,707 over 10 years by car. The cumulative difference is $0 in favour of Round Mountain. Excludes purchase price, mortgage, and personal expenses.
Which of Round Mountain and Tanglewood 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: Tweed rates (OLG and Tweed 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.