| 1 Opala Court, Donvale | | Land size: | 4,028 sqm | | Backyard: | north facing | | Slope: | Gently Inclined |  |
| | Elevation Data | | Front [A] | Center | Back [B] | | 101.22m | 100.69m | 97.63m |
| The front of the land is 3.59m higher than the back.
Degree of slope is 4 percent.
(Average building cost of $6,000 for every 1 metre of fall) | | | | Left [C] | Center | Right [D] | | 98.39m | 100.69m | 101.44m |
| The right of the land is 3.05m higher than the left.
Degree of slope is 7 percent.
(Average building cost of $9,000 for every 1 metre of sideway fall) |
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