| House type | Roof Area (m2) | VR (m3/year) | Saved water tariff (US$/year) | SWR (%) |
| Type A (750 m2) | 417 | 122.7 | 112.9 | 95.3 |
| Type B (500 m2) | 245.8 | 72.3 | 66.5 | 56.1 |
| Type C (300 m2) | 154 | 45.34 | 41.7 | 35.2 |
| Type D (200 m2) | 149.6 | 44.05 | 40.5 | 34.2 |
| Type E (375 m2) | 177 | 52.2 | 48 | 39.8 |
| Type F (200 m2) | 110 | 32.4 | 30 | 24.8 |