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6.1 RS: RESIDENTIAL SUBURBAN ZONE

The Residential Suburban or RS Zone is intended to be applied in areas of the County which are particularly suited to large-lot development. The following regulations shall apply in all Residential Suburban or RS Zones. (Former Section INL#314-21; Ord. 1057, Sec. 3, 12/8/75; Amended by Ord. 1738, Sec. 1, 5/20/86; Amended by Ord. 1848, Sec. 9, 9/13/88; Amended by Ord. 1876 Sec. 4, 9/26/89)

314-6.1

RS: RESIDENTIAL SUBURBAN

Principal Permitted Uses

One-family dwellings.

Accessory dwelling unit.

Servants’ quarters and guest houses.

Keeping of no more than eight (8) household pets on each lot.

Uses Permitted with a Use Permit

Private institutions.

Private recreation facilities, including golf courses.

Manufactured home parks at a density no greater than allowed by the minimum parcel size in the zone or as may be modified by a combining zone.

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the RS zone.

Other Regulations

Minimum Lot Area

One (1) acre.

Minimum Lot Width

One hundred twenty-five (125) feet.

Minimum Lot Depth

One hundred ten (110) feet.

Minimum Yard Setbacks*

Front

Twenty (20) feet.

Rear

Ten (10) feet.

Interior Side

Five (5) feet.

Exterior Side

Same as front or one-half (1/2) the front if all parts of the main building are more than twenty-five (25) feet from the rear lot line, and the exterior side yard does not abut a collector or higher order street. (In questionable cases, the Public Works Director shall classify the subject street.)

Double Frontage Lots

Front and rear twenty (20) feet, except the rear yard setback may be reduced to ten (10) feet where such yard abuts an alley.

Flag Lots

For flag lots, the Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for a vehicular turnaround on the lot.

Maximum Ground Coverage

Thirty-five percent (35%).

Maximum Building Height

Thirty-five (35) feet.

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(Former Section INL#314-21(a)(1-3); INL#314-21(b)(1-3); INL#314-21(c)(1-6))

6.2 R-1: RESIDENTIAL ONE-FAMILY ZONE

The Residential One-Family or R-l Zone is intended to be applied in areas of the County in which topography, access, utilities and public services make the area suitable and desirable for low density residential development. The following regulations shall apply in all Residential One-Family or R-l Zones. (Former Section INL#314-24; Ord. 1235, Sec. 1, 6/13/78; Amended by Ord. 1738, Sec. 2, 5/20/86; Amended by Ord. 1848, Sec. 10, 9/13/88; Amended by Ord. 1876, Sec. 5, 9/26/89)

314-6.2

R-1: RESIDENTIAL ONE-FAMILY

Principal Permitted Uses

One family dwelling.

Accessory dwelling unit.

Single-unit supportive housing and transitional housing subject only to restrictions that apply to other residential dwellings of the same type in the same zone.

Rooming and boarding of not over two (2) persons not employed on the premises.

Keeping of no more than four (4) household pets on each lot.

Uses Permitted with a Use Permit

Guest houses and servants quarters.

Public and private noncommercial recreation facilities, including golf courses.

Manufactured home parks at a density no greater than allowed by the minimum parcel size in the zone or as may be modified by a combining zone.

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the R-1 zone.

Other Regulations

Minimum Lot Area

Five thousand (5,000) square feet.

Minimum Lot Width

Fifty (50) feet.

Maximum Lot Depth

Three (3) times lot width.

Minimum Yard Setbacks*

Front

Twenty (20) feet.

Rear

Ten (10) feet.

Interior Side

Five (5) feet.

Exterior Side

Same as front or one-half the front if all parts of the main building are more than twenty-five (25) feet from the rear lot line, and the exterior side yard does not abut a collector or higher order street. (In questionable cases, the Public Works Director shall classify the subject street.)

Double Frontage Lots

Front and rear twenty (20) feet, except the rear yard setbacks may be reduced to ten (10) feet where such yard abuts an alley.

Flag Lots

For flag lots, the Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for a vehicular turnaround on the lot.

Maximum Ground Coverage

Thirty-five percent (35%).

Maximum Building Height

Thirty-five (35) feet.

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(Former Section INL#314-24(a)(1-3); INL#314-24(b)(1-3); INL#314-24(c)(1-6))

6.3 R-2: RESIDENTIAL TWO-FAMILY ZONE

The Residential Two-Family or R-2 Zone is intended to be allowed in areas of the County close to urban centers where all utilities and services are available and where an increased density is appropriate on each building site. The following regulations shall apply in all Residential Two-Family or R-2 Zones. (Former Section INL#314-27; Ord. 1057, Sec. 5, 12/8/75: Amended by Ord. 1738, Sec. 3, 5/20/86; Amended by Ord. 1848, Sec. 11, 9/13/88; Amended by Ord. 1876, Sec. 6, 9/26/89)

314-6.3

R-2: RESIDENTIAL TWO-FAMILY

Principal Permitted Uses

One-family dwellings.

Two-family dwellings.

Accessory dwelling unit.

Supportive housing and transitional housing subject only to restrictions that apply to other residential dwellings of the same type in the same zone.

Rooming and boarding of not more than two (2) persons not employed on the premises.

Keeping of no more than four (4) household pets for each dwelling unit.

Uses Permitted with a Use Permit

Guest houses and servants quarters.

Private institutions.

Manufactured home parks at a density no greater than allowed by the minimum parcel size in the zone or as may be modified by a combining zone.

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the R-2 zone.

Other Regulations

Minimum Lot Area

Five thousand (5,000) square feet.

Minimum Lot Width

Fifty (50) feet.

Maximum Lot Depth

Three (3) times lot width.

Minimum Yard Setbacks*

Front

Twenty (20) feet.

Rear

Ten (10) feet.

Interior Side

Five (5) feet.

Exterior Side

Same as front or one-half the front if all parts of the main building are more than twenty-five (25) feet from the rear lot line, and the exterior side yard does not abut a collector or higher order street. (In questionable cases, the Public Works Director shall classify the subject street.)

Double Frontage Lots

Front and rear twenty (20) feet, except the rear yard setbacks may be reduced to ten (10) feet where such yard abuts an alley.

Flag Lots

For Flag Lots, the Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for a vehicular turnaround on the lot.

Maximum Ground Coverage

Forty percent (40%).

Maximum Building Height

Thirty-five (35) feet.

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(Former Section INL#314-27(a)(1-4); INL#314-27(b)(1-3); INL#314-27(c)(1-6))

6.4 R-3: RESIDENTIAL MULTIPLE FAMILY ZONE

The Residential Multiple Family or R-3 Zone is intended to apply in areas of the County where it is reasonable to permit and protect low density apartment developments. The following regulations shall apply in all Residential Multiple Family or R-3 Zones. (Former Section INL#314-30; Ord. 519, Sec. 440, 5/11/65; Amended by Ord. 1848, Sec. 12, 9/13/88; Amended by Ord. 1876, Sec. 7, 9/26/89; Amended by Ord. 2166, Sec. 12, 4/7/98; Amended by Ord. 2472, Sec. 1, 2/14/12)

314-6.4

R-3: RESIDENTIAL MULTIPLE FAMILY

Principal Permitted Uses

Two-family dwellings. (Amended by Ord. 2166, 4/7/98)

Accessory dwelling unit.

Dwelling groups and multiple dwellings containing four or fewer units per building. (Amended by Ord. 2313A, 12/16/03)

Supportive housing and transitional housing subject only to restrictions that apply to other residential dwellings of the same type in the same zone.

Keeping of no more than two (2) household pets for each dwelling unit.

Emergency shelters.

Single room occupancy facilities.

Uses Permitted with a Use Permit

Hotels, motels, manufactured home parks, and rooming and boarding houses. (Amended by Ord. 2335, 12/14/04)

Private institutions.

Professional offices.

One-family dwellings and accessory dwelling units where it can be shown that the property could be developed in the future with multifamily dwellings. The Hearing Officer may require submittal of a development plan which shows how the multifamily dwelling units could be sited on the property in conformance with County requirements. (Added by Ord. 2166, Sec. 12, 4/7/98)

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the R-3 Zone.

Other Regulations

Minimum Lot Area

Five thousand (5,000) square feet, but not less than five hundred (500) square feet for each dwelling unit.

Minimum Lot Width

Fifty (50) feet.

Maximum Lot Depth

Three (3) times lot width.

Minimum Yard Setbacks*

Front

Twenty (20) feet.

Rear

Ten (10) feet.

Interior Side

Five (5) feet.

Exterior Side

Same as front or one-half the front if all parts of the main building are more than twenty-five (25) feet from the rear lot line, and the exterior side yard does not abut a collector or higher order street. (In questionable cases, the Public Works Director shall classify the subject street.)

Double Frontage Lots

Front and rear twenty (20) feet, except the rear yard setbacks may be reduced to ten (10) feet where such yard abuts an alley.

Flag Lots

For flag lots, the Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for a vehicular turnaround on the lot.

Special yards for multiple dwellings on the same lot

The distance between separate dwelling units in a group on the same lot shall be not less than ten (10) feet. (Amended by Ord. 2214, 6/6/00)

The distance between the front of any dwelling unit in the group and any other building shall be not less than twenty feet (20').

The distance between the front of any dwelling unit in the group and any side lot line shall be not less than twelve feet (12').

All of the above distances shall be increased by two feet (2') for each two feet (2') that any building on the lot exceeds two (2) stories.

Maximum Ground Coverage

Sixty percent (60%).

Maximum Building Height

Forty-five feet (45').

Maximum Density

The maximum density as specified by the General Plan. The maximum density for the parcel shall be calculated as the maximum density permitted by the General Plan land use designation (i.e. number of dwelling units per acre) divided by the total area within the lot and within one-half of any adjacent street(s). (Added by Ord. 2313A, 12/16/03)

Design Considerations (Advisory only)

The following items shall guide the design of projects involving more than four units:

- Avoid letting garages, driveways and parking lots dominate the streetscape.

- Design to minimize conflicts between vehicles and pedestrians.

- Design public open areas to the same level of quality as any other “space” in the development.

- Provide direct access to open space from the dwelling units that the open space is intended to serve.

- Provide visual access to shared open spaces from individual units, preferably from the kitchen, living room or dining room.

- Avoid lighting which shines directly into dwelling units on- and off-site.

- Private outdoor space, including patios, porches, decks, balconies and yards should be of adequate size and within easy access of each dwelling unit.

- Good landscaping is critical to the quality of any multifamily project. (Added by Ord. 2313A, 12/16/03)

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(Former Section INL#314-30(a)(1-3); INL#314-30(b)(1-4); INL#314-30(c)(1-7; Amended by Ord. 2166, 4/7/98)

6.5 R-4: APARTMENT PROFESSIONAL ZONE

The Apartment Professional or R-4 Zone is intended to apply in areas suitable for higher density residential uses and for professional and business offices and institutional uses. The following regulations shall apply in all Apartment Professional or R-4 Zones. (Former Section INL#314-31; Ord. 519, Sec. 440, 5/11/65; Amended by Ord. 1848, Sec. 13, 9/13/88; Amended by Ord. 1876, Sec. 8, 9/26/89; Amended by Ord. 2166, Sec. 13, 4/7/98; Amended by Ord. 2472, Sec. 1, 2/14/12)

314-6.5 R-4: APARTMENT PROFESSIONAL

Principal Permitted Uses

Two-family dwellings and multiple dwellings, accessory dwelling units accessory to multifamily dwellings, and dwelling groups. (Amended by Ord. 2166, Sec. 13, 4/7/98)

Supportive housing and transitional housing subject only to restrictions that apply to other residential dwellings of the same type in the same zone.

Professional and business offices.

Commercial instruction.

Boarding and rooming houses.

Keeping of no more than two (2) household pets for each dwelling unit.

Manufactured home parks.

Single room occupancy facilities.

Uses Permitted with a Use Permit

Hotels, motels and emergency shelters. (Amended by Ord. 2335, 12/14/04)

Private institutions.

Social halls and fraternal and social organizations.

Noncommercial recreation facilities.

Mortuaries.

Small animal hospitals completely enclosed within a building.

One-family dwellings where it can be shown that the property could be developed in the future with multifamily dwellings. The Hearing Officer may require submittal of a development plan which shows how the multifamily dwelling units could be sited on the property in conformance with County requirements. (Added by Ord. 2166, Sec. 13, 4/7/98)

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the R-4 zone.

314-6.5

R-4: APARTMENT PROFESSIONAL

Other Regulations

Minimum Lot Area

5,000 square feet, but not less than 500 square feet for each dwelling unit.

Minimum Lot Width

Fifty feet (50').

Maximum Lot Depth

Three (3) times lot width.

Minimum Yard Setbacks*

Front

Twenty (20) feet.

Rear

Ten (10) feet.

Interior Side

Five (5) feet.

Exterior Side

Same as front or one-half (l/2) the front if all parts of the main building are more than twenty-five (25) feet from the rear lot line, and the exterior side yard does not abut a collector or higher order street. (In questionable cases, the Public Works Director shall classify the subject street.)

Double Frontage Lots

Front and rear twenty (20 feet, except the rear yard setbacks may be reduced to ten (10) feet where such yard abuts an alley.

Flag Lots

For Flag Lots, the Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for a vehicular turnaround on the lot.

Special yards for multiple dwellings on the same lot

The distance between separate dwelling units in a group on the same lot shall be not less than ten feet (10'). (Amended by Ord. 2214, 6/6/00)

The distance between the front of any dwelling unit in the group and any other building shall be not less than twenty feet (20').

The distance between the front of any dwelling unit in the group and any side lot line shall be not less than twelve feet (12').

All of the above distances shall be increased by two feet (2') for each two feet (2') that any building on the lot exceeds two (2) stories.

Maximum Ground Coverage

Sixty percent (60%).

Maximum Building Height

Forty-five feet (45').

Maximum Density

The maximum density as specified by the General Plan. The maximum density for the parcel shall be calculated as the maximum density permitted by the General Plan land use designation (i.e. number of dwelling units per acre) divided by the total area within the lot and within one-half of any adjacent street(s). (Added by Ord. 2313A, 12/16/03)

Design Considerations (Advisory Only)

The following items shall guide the design of projects involving more than four units:

- Avoid letting garages, driveways and parking lots dominate the streetscape.

- Design to minimize conflicts between vehicles and pedestrians.

- Design public open areas to the same level of quality as any other “space” in the development.

- Provide direct access to open space from the dwelling units that the open space is intended to serve.

- Provide visual access to shared open spaces from individual units, preferably from the kitchen, living room or dining room.

- Avoid lighting which shines directly into dwelling units on- and off-site.

- Private outdoor space, including patios, porches, decks, balconies and yards should be of adequate size and within easy access of each dwelling unit.

- Good landscaping is critical to the quality of any multifamily project. (Added by Ord. 2313A, 12/16/03)

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(Former Section INL#314-31(a)(1-6); INL#314-31(b)(1-7); INL#314-31(c))

6.6 RA: RURAL RESIDENTIAL AGRICULTURE

Principal Permitted Uses. The following use types are permitted pursuant to the Development Permit Procedures in Chapter 2 of this Division. (Former Section INL#314-20; Added by Ord. 2205, Sec. 1, 4/11/00)

314-6.6

RA: RURAL RESIDENTIAL AGRICULTURE

Use Type

Principal Permitted Use

Residential Use Types

Single Family Residential

Accessory Dwelling Unit (Amended by Ord. 2167, Sec. 16, 4/7/98)

Civic Use Types

Minor Utilities

Agricultural Use Types

General Agriculture

Industrial Use Types

Cottage Industry; subject to the Cottage Industry Regulations

(Amended by Ord. 2167, Sec. 16, 4/7/98)

Use Type

Conditionally Permitted Use

Residential Use Types

Guest House

Civic Use Types

Essential Services

Community Assembly

Public Recreation and Open Space

Solid Waste Disposal; subject to the Solid Waste Disposal Regulations

Oil and Gas Pipelines; subject to the Oil and Gas Pipeline Regulations

Major Electrical Distribution Lines; subject to the Electrical Distribution Lines Regulations

Minor Generation and Distribution Facilities

Commercial Use Types

Neighborhood Commercial

Bed and Breakfast Establishment; subject to the Bed and Breakfast Establishment Regulations

Private Recreation

Agricultural Use Types

Stables and Kennels

Intensive Agriculture

Commercial Timber Use Type

Timber Production

Extractive Use Type

Surface Mining - 2; subject to the Surface Mining Regulations

Natural Resource Use Types

Fish and Wildlife Management

Watershed Management

Wetland Restoration

Coastal Access Facilities

Use Types Not Listed in This Table

Any use not specifically enumerated in this division, if it is similar to and compatible with the uses permitted in the RA zone.

314-6.6

RA: RURAL RESIDENTIAL AGRICULTURE

Development Standards

Minimum Lot Size and Minimum Lot Width

Zone Designation

Minimum Lot Size

Minimum Lot Width

RA-1

1.0 acre

150 feet

RA-2

2.0 acres

175 feet

RA-2.5

2.5 acres

175 feet

RA-5

5.0 acres

250 feet

RA-10

10.0 acres

350 feet

RA-20

20.0 acres

475 feet

RA-40

40.0 acres

750 feet

Maximum Lot Depth

Four (4) times the lot width.

Maximum Density

Either one dwelling unit per lawfully created lot or two dwelling units per lawfully created lot if a Special Permit is secured for a second residential unit.

(Amended by Ord. 2167, Sec. 16, 4/7/98)

Minimum Yard Setbacks*

Minimum Lot Size Less Than 2.5 Acres

Minimum Lot Size 2.5 Acres or Greater

Front

Twenty (20) feet

Twenty (20) feet; Thirty (30) feet for flag lots

Rear

Ten (10) feet

Thirty (30) feet

Interior Side

Five (5) feet

Thirty (30) feet

Exterior Side

Twenty (20) feet

Thirty (30) feet

Flag Lots

The Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for vehicular turnaround on the lot.

The Director, in consultation with the Public Works Department, shall establish the minimum yard that is required for vehicular turnaround on the lot.

Double Frontage Lots

Front and rear yards shall be twenty (20) feet, except that the rear yard setback may be reduced to ten (10) feet where such yard abuts an alley.

Front and rear yards shall be twenty (20) feet, except that the rear yard setback may be reduced to ten (10) feet where such yard abuts an alley.

Maximum Ground Coverage

Thirty-five percent (35%)

Maximum Structure Height

Thirty-five (35) feet.

Permitted Main Building Types

Residential Single Detached

Limited Mixed Residential - Nonresidential

Nonresidential Detached or Multiple/Group

* Note: Setbacks may be modified by other provisions of this Code or State law. For example, see Section 314-22.1, “Alquist-Priolo Fault Hazard” and the “Fire Safe” Regulations at Title III, Division 11.

(From Sections CZ#A313-17(A)(1-4); CZ#A313-17(B)(1-7); CZ#A313-17(C)(1-6); Amended by Ord. 2167, Sec. 16, 4/7/98) (Ord. 2678, § 4, 7/13/2021; Ord. 2693, § 9, 6/7/2022; Ord. 2721, § 7, 7/11/2023)