Australia Site Coverage & Plot Ratio Calculator
Check site coverage and floor space ratio against Australian residential zoning controls, including setback and height limits.
- R2 Site Coverage
- 50%
- Low density
- R3 FSR
- 0.9:1
- Medium density
- R4 FSR
- 1.5:1
- High density
Formula & Statutory Rule
Formula
site_coverage = footprint / site_area × 100
Statutory Rule
FSR = total_floor_area / site_area; R2 = 50% coverage; R3 FSR = 0.9:1Regional Benchmark Reference
| Jurisdiction / Tier | Rate or Limit | Statutory Note |
|---|---|---|
| R2 | 50% | Coverage |
| R3 | 0.9:1 | FSR |
| R4 | 1.5:1 | FSR |
Frequently Asked Questions
What is site coverage?
Site coverage is the proportion of a site covered by buildings at ground level.
What is floor space ratio?
FSR is total floor area divided by site area, the Australian equivalent of FAR.
How do zones differ?
Low-density R2 zones cap coverage near 50%, while higher-density R3 and R4 zones permit greater FSR.
Do setbacks reduce the envelope?
Yes. Front, side and rear setbacks shrink the buildable area before coverage and FSR apply.