| 11 Opala Court, Donvale | | Land size: | 3,785 sqm | | Backyard: | south facing | | Slope: | Gently Inclined |  |
| | Elevation Data | | Front [A] | Center | Back [B] | | 99.64m | 103.37m | 104.33m |
| The back of the land is 4.69m higher than the front.
Degree of slope is 5 percent.
(Average building cost of $6,000 for every 1 metre of fall) | | | | Left [C] | Center | Right [D] | | 103.1m | 103.37m | 100.21m |
| The left of the land is 2.89m higher than the right.
Degree of slope is 7 percent.
(Average building cost of $9,000 for every 1 metre of sideway fall) |
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