The purpose of the A-10 (agricultural conservation) zone is to provide areas for general agricultural uses and to preserve lands best suited to agriculture against premature urban encroachment and to prevent the premature intrusion of incompatible activities.
(Ord. 408, 1987)
The following uses are permitted within the A-10 zone:
A. 
One single-family dwelling per parcel, including manufactured homes;
B. 
Rooming and boarding subject to Section 17.650.003;
C. 
Accessory facilities or buildings related to the primary use subject to Chapter 17.660;
D. 
Temporary uses related to the primary use and subject to obtaining a temporary use permit pursuant to Chapter 17.850;
E. 
Home occupations subject to obtaining a home occupation permit pursuant to Chapter 17.840;
F. 
Small family residential care facilities subject to locational criteria adopted by resolution of the planning commission of the city of Brentwood;
G. 
Signs subject to Chapter 17.640;
H. 
All types of agriculture, including general farming, horticulture, floriculture, nurseries and greenhouses, mushroom rooms, forestry and similar agricultural uses other than those uses identified as conditionally permitted;
I. 
Other agricultural uses, including the erection and maintenance of sheds, warehouses, granaries, dehydration plants, hullers and similar uses necessary for the primary processing, packing and shipping of agricultural products;
J. 
A temporary stand not exceeding two hundred square feet for the sale of agricultural products predominantly grown in the East Contra Costa County area. The stand shall be set back at least twenty-five feet from the front property line and shall be placed out of view from the public right-of-way when the stand is not in regular use. The stand shall be subject to the approval and conditions of a temporary use permit pursuant to Chapter 17.850;
K. 
Limited animal husbandry and private kennels subject to the provision of Chapter 17.670.
(Ord. 408, 1987)
The following uses are permitted only on the granting of a conditional use permit pursuant to Chapter 17.830:
A. 
Animal husbandry;
B. 
Merchandising of agricultural supplies and services incidental to an agricultural use, canneries, wineries and processing of agricultural products;
C. 
Cold storage plant, slaughter houses, stock yards, livestock sales or auction yards;
D. 
Commercial recreation uses which are primarily open and not within a building;
E. 
Secondary housing units subject to Section 17.100.005;
F. 
Large residential care facilities and day care centers subject to locational criteria adopted by resolution of the planning commission of the city of Brentwood.
(Ord. 408, 1987)
The following regulations shall apply to the A-10 zone:
A. 
Minimum lot area: ten acres;
B. 
Minimum lot width: three hundred feet;
C. 
Minimum front yard: fifty feet;
D. 
Minimum side yard: twenty-five feet;
E. 
Minimum rear yard: fifty feet;
F. 
Yards—accessory buildings and structures:
1. 
Minimum setback from main building: eight feet except for accessory buildings housing animals or livestock which shall be set back thirty feet,
2. 
Minimum rear yard: twenty feet,
3. 
Minimum side yard: ten feet,
4. 
No accessory building or structure housing animals, grain-fed rodents, bees, birds or poultry shall be located nearer than fifty feet of any residential land use district or a main building on an adjacent lot;
G. 
Maximum Building Height. No accessory or main building shall exceed a height of two-and-one-half stories or thirty-five feet, unless a greater building height is approved by a conditional use permit;
H. 
Architectural features may project into any required yard pursuant to Chapter 17.660.
(Ord. 408, 1987)
A. 
Off-street parking shall be provided pursuant to Chapter 17.620 and Sections 17.100.004H.
B. 
Design review shall be required for all housing units pursuant to Section 17.100.003 and 17.100.004.
C. 
Accessory buildings shall be prohibited in any required front yard.
D. 
A water well with minimum enclosure shall be permitted in any required front yard provided the well site is in the only possible location on the property.
(Ord. 408, 1987)