Land use regulations are:
A. Permitted Uses.
1. All kinds of agricultural uses;
2. Airstrip;
3. Poultry farms, fur farms, pig farms and feedlots;
4. One single family dwelling (permanent structure or one manufactured home);
5. All existing dwellings in this district shall be regularly permitted uses and not considered as nonconforming uses;
6. Dormitory or attached (duplex, etc.) Farm labor housing unit accommodating up to five families on parcels of thirty-six acres net (forty acres gross) or larger;
7. Communication tower/wireless communications facility placed atop an existing structure, which will not increase the height of said structure above twenty additional feet, or exceed the height limit of this zone district, whichever is greater;
8. Second single family dwelling (subject to parcel size requirements and development standards as per Section 18.04.153).
B. Uses Allowed with Zoning Permit.
1. Home occupation;
2. Communications tower/wireless communications facility placed atop or adjacent to an existing a structure in instances in which the height of the proposed facility will not exceed forty additional feet (sixty additional feet if the proposal provides for colocation) above the existing structure’s height.
C. Uses Allowed with Conditional Use Permit.
1. Animal hospitals, kennels and laboratories using animals or animal products (see Chapter 18.94);
2. Laboratories for testing, experimental or analytical purposes (see Chapter 18.94);
3. Public and commercial refuse disposal sites (see Chapter 18.94);
4. Mining;
5. Additional dwelling units, not to exceed one unit per twenty acres of contiguous ownership of a ranch or farm, for occupancy by members of the immediate family, bound by ties of consanguinity, or employees of that ranch or farm; provided, that if the total number of dwelling units exceeds one unit per twenty acres for the parcel on which they are located, said parcel shall be combined with an adjacent parcel or parcels of the same ownership to create a single parcel of a size equal to twenty acres per dwelling unit unless otherwise authorized by the board of supervisors;
6. Farm labor housing on parcels of thirty-six acres net (forty acres gross) or larger;
7. Dairy;
8. Communications tower/wireless communications facility that does not meet the standards as specified in either subsection A or B of this section. (Ord. 525HH § 16(part), 2008: Ord. 525H § 18, 1999: Ord. 525-F § 8(part), 1994: Ord. 525C § 10, 1993: Ord. 525 § 1(part), 1989).

(See also Sections 18.98.010 through 18.98.090.) Structure location regulations are:
A. Setback from edge of right-of-way: twenty-five feet, minimum;
B. Side yard offset: ten feet, minimum;
C. Rear yard offset: twenty feet, minimum.
(Ord. 525HH § 16(part), 2008: Ord. 525-F § 8(part), 1994: Ord. 525 § 1(part), 1989).

(See also Sections 18.98.100 through 18.98.130.) Structure height regulations are:
A. Principal building or structure height: thirty-five feet, maximum;
B. Accessory building or structure height: fifteen feet, maximum, except farm buildings or ranch buildings: sixty feet, maximum. (Ord. 525HH § 16(part), 2008: Ord. 525-F § 8(part), 1994: Ord. 525 § 1(part), 1989).

(See also Section 18.100.010.) Lot dimension regulations are:
A. Lot area: eighty to six hundred forty acres as specified on the zoning district maps; the minimum parcel size is designated by the number following the ARE prefix shown on the official zoning maps:
ARE-80: minimum lot area eighty acres,
ARE-160: minimum lot area one hundred sixty acres,
ARE-320: minimum lot area three hundred twenty acres,
ARE-640: minimum lot area six hundred forty acres;
B. Average lot width: four hundred feet, minimum;
C. Lot length to width ratio permitted: _____;
D. Total building area to lot area ratio permitted: five percent, maximum, except agriculturally oriented services shall not exceed twenty-five percent, and poultry ranches, greenhouses and similar uses shall be permitted a maximum of fifty percent. (Ord. 525HH § 16(part), 2008: Ord. 525Q § 5, 2004: Ord. 525-F § 8(part), 1994: Ord. 525 § 1(part), 1989).