A. For unsubdivided lots, individual lots that are not part of a residential subdivision platted under SR-2 zoning:
1. A minimum of thirty percent of the area of a lot, excluding the area occupied by driveways, utility trenches, or perimeter fencing or walls, shall be left as natural area, as that term is defined in Section 18.61.030(A)(10).
2. The location of the designated natural area on a lot shall be shown on a site plan submitted at the time of building permit application.
B. For residential subdivisions:
1. An area which equals a minimum of thirty percent of the combined area of all residential lots in the subdivision shall be left as natural area, as that term is defined in Section 18.61.030(A)(10).
2. The location of the required amount of natural area, which may be part of the common areas of the subdivision or part of individual lots, shall be shown on the final plat and referenced in a plat note.
C. Except as permitted by this chapter, no development shall occur in a designated natural area.
D. Exceptions. The zoning inspector may approve a smaller percentage of natural area than required under this section where the property owner presents evidence that prior to the establishment of SR-2 zoning on the parcel, an area greater than the open space area required under this section was already graded or improved.
(Ord. 1994-147 § 4 (part), 1994)