A.

Intent. The hillside overlay districts, hereinafter designated as H-O, are established, per the Castro Valley General Plan, in areas with steep slopes or near high fire hazard, to implement the purpose and intent of the hillside residential land use classification.

B.

Applicability. Unless otherwise noted, the requirements of this section apply to all property located within an H-O district.

C.

Design Standards and Guidelines. Property located within the H-O district shall be subject to the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," as amended, as applicable to the base zoning district. On matters not provided for in the Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County, the respective regulations in this zoning ordinance shall apply. If there is a conflict between the residential design guidelines and the requirements of this section, or this section is silent, the residential design guidelines supersede this section.

D.

Minimum Lot Size.

1.

Minimum lot size is based on the average slope of the parcel as follows:

a.

Average slope of ten percent or less: Five thousand (5,000) square foot minimum lot size.

b.

Average slope more than ten percent, but less than or equal to twenty (20) percent: Six thousand five hundred (6,500) square foot minimum lot size.

c.

Average slope more than twenty (20) percent, but less than or equal to thirty (30) percent: Seven thousand five hundred (7,500) square foot minimum lot size.

d.

Average slope greater than thirty (30) percent: Ten thousand (10,000) square foot minimum lot size.

2.

Minimum lot size calculations shall exclude:

a.

Any private streets, street parking spaces, access easements, stems, and driveways that serve more than one lot;

b.

Riparian areas as defined in the residential design guidelines; and

c.

Portions of the lot with slope over thirty (30) percent slope. Exception, where entire lot has natural grade over thirty (30) percent, development allowed subject to site development review (SDR) in compliance with Section 17.54.210.

E.

Front Setback Adjustment for Parking. In order to reduce grading on lots where the average slope is more than twenty (20) percent, required parking (including a private garage) may be located as close as five feet to the street property line, subject to site development review in compliance with Section 17.54.210 (Site development review). Portions of the dwelling and accessory structures, other than the garage, shall comply with the setback requirements of the base zoning district.

F.

Entrances. Entrances must be proportionate to the scale of the façade and must be no taller than two-thirds of the building height.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Residential Small Lot districts, hereinafter designated as RSL, are established to support infill projects of duplexes, small lot single-family detached units, and townhouses. The RSL district implements and is consistent with the residential small lot land use classification of the Castro Valley General Plan.

B.

Design Standards and Guidelines. Residential projects within the RSL districts located within the planning areas of Castro Valley (areas within the Castro Valley Urbanized Area) are subject to the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," as amended, as applicable based on the proposed building type. On matters not provided for in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," the respective regulations in this zoning ordinance apply. If there is a conflict between the residential design guidelines and the requirements of this section, or this section is silent, the residential design guidelines applicable to the proposed building type supersede this section.

C.

Permitted Uses. The following principal uses are permitted in an RSL district:

1.

One one-family dwelling, one two-family dwelling, two one-family dwellings, multiple dwelling;

2.

Licensed transitional or supportive housing for up to six persons, medical or residential care facility for up to six persons;

3.

Field crop, orchard, garden; and

4.

Small family day cares and large family day cares.

D.

Conditional Uses. In addition to the uses listed in Sections 17.52.480 and 17.52.580, the following are conditional uses in RSL districts, and are permitted only if approved by the board of zoning adjustments as provided in Section 17.54.130:

1.

Community facilities;

2.

Parking lot, when established to fulfill the residential parking requirements for a use on an abutting lot or lots;

3.

Indoor plant nursery or greenhouse used only for the cultivation and wholesale of plant materials;

4.

Medical or residential care facility for seven or more persons unit as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

5.

Licensed transitional or supportive housing for seven or more persons per unit as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

6.

Mobilehome parks subject to the provisions provided in Sections 17.52.1000 to 17.52.1065;

7.

Community clubhouse; and

8.

Unattended collection box(es) placed in conjunction with an approved community facility as defined in Section 17.04.010.

E.

Density Limitations. The density must not exceed seventeen (17) units per acre.

F.

Building site.

1.

Every use in an RSL district must be on a building site with an area not less than two thousand five hundred (2,500) square feet and a median lot width not less than forty (40) feet.

2.

Lot width exceptions: If small-lot single-family homes with attached double loaded garages in front of the primary façade of the main building comply with parking location and design requirements in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," a lot width of thirty-five (35) feet is allowed. The lot width may be reduced to thirty (30) feet if garages are single-car wide, detached and/or accessed from an alley.

G.

Yards. The yard requirements in RSL districts are as follows, subject to the general provisions of Section 17.52.330:

1.

Depth of front yard: Not less than fifteen (15) feet.

2.

Depth of rear yard: Not less than fifteen (15) feet.

3.

Width of side yard: Not less than four feet.

H.

Height of Buildings. Height must not exceed twenty-five (25) feet, except as provided by Section 17.52.090.

I.

Site Development Review. Site development review in compliance with Section 17.54.210 is required for residential projects with five or more units possible.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Residential medium density family districts, hereinafter designated as RMF, are established to support medium density multi-family residential development in Castro Valley. The RMF district implements and is consistent with the residential medium density multifamily land use classification of the Castro Valley General Plan.

B.

Design Standards and Guidelines. Residential projects within the RMF districts located within the planning areas of Castro Valley (areas within the Castro Valley Urbanized Area) are subject to the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," as amended, as applicable based on the proposed building type. On matters not provided for in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," the respective regulations in this zoning ordinance apply. If there is a conflict between the residential design guidelines and the requirements of this section, or this section is silent, the residential design guidelines applicable to the proposed building type supersedes this section, unless otherwise noted below.

C.

Permitted Uses. The following principal uses are permitted in an RMF district:

1.

Two-family dwelling, multiple dwelling or dwelling group;

2.

Field crop, orchard or garden;

3.

Licensed transitional or supportive housing for up to six persons, medical or residential care facility for up to six persons; and

4.

Small family day care and large family day care.

D.

Conditional uses—Planning commission. The following are conditional uses permitted in an RMF district only if approved by the planning commission, sitting as a board of zoning adjustments, as provided in Sections 17.54.135 and 17.14.010:

1.

Hospital; and

2.

Medical laboratory, dental laboratory.

E.

Conditional Uses—Board of Zoning Adjustments. In addition to the uses listed for Sections 17.52.480 and 17.52.580, the following are conditional uses in RMF districts, and are permitted only if approved by the board of zoning adjustments as provided in Section 17.54.130:

1.

Community facilities;

2.

Day care centers;

3.

Parking lot;

4.

Medical or residential care facility for seven or more persons as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

5.

Community clubhouse;

6.

Plant nursey, or greenhouse used only for the cultivation of plant materials;

7.

Licensed transitional and supportive housing for seven or more persons per unit as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

8.

Mobilehome parks subject to the provisions provided in Sections 17.52.1000 to 17.52.1065; and

9.

Unattended collection box(es) placed in conjunction with an approved community facility as defined in Section 17.04.010.

F.

Density Limitations. The density must not exceed twenty-nine (29) dwelling units per acre. This standard supersedes the requirements of the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" for townhomes and multi-family residential building types.

G.

Building Site. Every use in an RMF district must be on a building site with a lot width of not less than fifty (50) feet and an area not less than five thousand (5,000) square feet. A corner building site must have a median lot width of not less than sixty (60) feet.

H.

Yards. The yard requirements in RMF districts are as follows, subject to the general provisions of Section 17.52.330. The standards in this subsection supersede the requirements of the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" for multi-family residential building types only. Other building types must follow requirements in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County":

1.

Depth of front yard: Not less than ten feet.

2.

Depth of rear yard: Not less than fifteen (15) feet.

3.

Width of side yard: Not less than five feet or ten feet on the street side of a corner lot, or less as required by Section 17.14.080. Townhomes shall have no side setback requirement where they share common walls.

I.

Height of Buildings. Height must not exceed thirty-five (35) feet, except as otherwise provided in Section 17.52.090.

J.

Site Development Review. Site development review in compliance with Section 17.54.120 required for residential projects with five or more units possible.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Residential mixed density districts, hereinafter designated as RMX, are established to support a mixture of single-family and multi-family residential development in areas close to the commercial business district. The RMX district implements and is consistent with the residential mixed density land use classification of the Castro Valley General Plan.

B.

Design Standards and Guidelines. Residential projects within the RMX districts located within the planning areas of Castro Valley (areas within the Castro Valley Urbanized Area) is subject to the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," as amended, as applicable based on the proposed building type. On matters not provided for in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," the respective regulations in this zoning ordinance apply. If there is a conflict between the residential design guidelines and the requirements of this section, or this section is silent, the residential design guidelines applicable to the proposed building type supersedes this section, unless otherwise noted below.

C.

Permitted Uses. The following principal uses are permitted in an RMX district:

1.

One one-family dwelling, one two-family dwelling, two one-family dwellings, multiple dwelling or dwelling group;

2.

Field crop, orchard or garden;

3.

Licensed transitional or supportive housing for up to six persons, medical or residential care facility for up to six persons; and

4.

Small family day care and large family day care.

D.

Conditional Uses—Planning Commission. The following are conditional uses and are permitted in an RMX district only if approved by the planning commission, sitting as a board of zoning adjustments, as provided in Sections 17.54.135 and 17.14.010:

1.

Hospital; and

2.

Medical laboratory, dental laboratory.

E.

Conditional Uses—Board of Zoning Adjustments. In addition to the uses listed for Sections 17.52.480 and 17.52.580, the following are conditional uses in RMX districts, and are permitted only if approved by the board of zoning adjustments as provided in Section 17.54.130:

1.

Community facilities;

2.

Day care centers;

3.

Parking lot;

4.

Medical or residential care facility for seven or more persons as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

5.

Single room occupancy facility subject to the provisions of Section 17.54.134 (Conditional uses—Single room occupancy (SRO) facilities);

6.

Licensed transitional and supportive housing for seven or more persons per unit as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

7.

Mobilehome parks subject to the provisions as regulated by Sections 17.52.1000 to 17.52.1065;

8.

Plan nursery, or greenhouse used only for the cultivation of plant materials;

9.

Community clubhouse; and

10.

Unattended collection box(es) placed in conjunction with an approved community facility as defined in Section 17.04.010.

F.

Density Limitations.

1.

The density must not exceed twenty-nine (29) dwelling units per acre. The standards in this subsection supersede the requirements of the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" for townhomes and multi-family residential building types only. Other building types must follow requirements in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County."

G.

Building Site. Every use in an RMX district must be on a building site with a median lot width not less than fifty (50) feet and an area not less than five thousand (5,000) square feet. A corner building site must have a median lot width of not less than sixty (60) feet.

H.

Yards. The yard requirements in RMX districts are as follows, subject to the general provisions of Section 17.52.330. The standards in this subsection supersede the requirements of the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" for multi-family residential building types only. Other building types must follow requirements in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County":

1.

Depth of front yard: Not less than ten feet.

2.

Depth of rear yard: Not less than ten feet.

3.

Width of side yard: Not less than five feet or ten feet on the street side of a corner lot, or less as required by Section 17.14.080. Townhomes shall have no side setback requirement where they share common walls.

I.

Height of Buildings. Height must not exceed forty-five (45) feet, except as provided by Section 17.52.090. The standards in this subsection supersede the requirements of the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" for multi-family residential building types only. Other building types must follow requirements in the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County" if more restrictive.

J.

Site Development Review. Site development review in compliance with Section 17.54.210 required for residential projects with five or more units possible.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Community commercial districts, hereinafter designated as CC, are established to provide a wide range of community-serving retail and commercial uses. The CC district implements and is consistent with the community commercial land use classification of the Castro Valley General Plan.

B.

Permitted Uses. The following principal uses are permitted in a CC district:

1.

Artisan/maker spaces;

2.

Auto parts, retail (not to include parts machining or auto repair);

3.

Business services; including but not limited to blue printing or other copying service, banks;

4.

Community facilities;

5.

Day care centers;

6.

Office or office building;

7.

Personal service establishment, personal service shop; including but not limited to barber shop, beauty parlor, dry cleaning, pharmacy, self-service laundry;

8.

Repair shop (non-automotive) including cameras, shoes, watches, and household appliances;

9.

Retail sales, including but not limited to books, clothing, flowers, hardware, household supplies, food sales, travel gifts, and products produced by permitted use on the premises;

10.

Restaurants; and

11.

Schools.

C.

Conditional Uses. The following are conditional uses and are permitted in a CC district only if approved by the planning commission, sitting as a board of zoning adjustments, as regulated by Sections 17.54.135 and 17.34.010:

1.

Animal hospital, kennel;

2.

Alcohol sales for on or off-site consumption, except at full-service restaurants;

3.

Clubhouse, or rooms used by members of an organized club, lodge, union or society;

4.

Commercial recreation facility;

5.

Community care facility;

6.

Drive in and drive through businesses;

7.

Funeral homes and mortuaries;

8.

Indoor plant nurseries;

9.

Indoor recreation facility;

10.

Parking lot;

11.

Public utility substation, not including service yard, storage of materials, or vehicles, or repair facilities;

12.

Service station, Type A; or a facility retailing automotive parts and supplies which are installed and serviced on the site but does not include, engine, transmission or differential rebuilding or body repair;

13.

Superstore (single business with area over one hundred thousand (100,000) square feet); and

14.

Theaters.

D.

Floor Area Ratio. The floor area ratio shall not exceed one and one-half.

E.

Yards. The yard requirements in CC districts are as follows, subject to the general provisions of Section 17.52.330:

1.

Depth of front yard: There is no front yard requirement, with the exception of where a CC district terminates at the boundary of an R district or any other C district except a C-1 or C-2 district in the same block, the depth of front yard in that block shall be not less than is required in abutting district.

2.

Depth of rear yard: None, except that where the abutting lot at the side is in any R district, the depth of the rear yard must be not less than six feet.

3.

Width of side yard: None, except that where the abutting lot at the side is in any R district the side year along that line shall be a width is greater than abutting R building site.

F.

Height of Buildings. Height must not exceed forty-five (45) feet, except as otherwise provided in Section 17.52.090. If a building is situated within fifty (50) feet of the boundary line of an R district other than RMF or RMX, the height must be no more than thirty-five (35) feet.

G.

Public Open Space. On sites one acre or larger, minimum five percent of the site must be devoted to public open space subject to the following standards:

1.

Public open space includes courtyards, patios, plazas, public outdoor seating areas, natural open space, public access to roof top open space, artwork, planted areas, and plazas.

2.

Public open space must be designed as an integral part of the overall site plan and enhance the building design, public views, and transitions to adjacent uses.

3.

Parking lots, parking lot landscaping, buildings, exterior hallways, and stairways do not qualify as open space.

4.

All public open space areas shall be maintained by the property owner.

H.

Site Development Review. Any building greater or equal to one thousand (1,000) square feet or any construction aggregating greater or equal to one thousand (1,000) square feet placed since July 9, 1977, is subject to site development review in compliance with Section 17.54.210; unless zoning approval is granted upon the determination that the construction constitutes a minor project and that the building permit plans are in compliance with the intent and objectives of the site development review procedure in Section 17.38.070.

I.

Signs. Signs permitted subject to same requirements for signs in the C-1 Zone, in Sections 17.38.100 through 17.38.150, in conformance with Section 17.52.520.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Public facility districts, hereinafter designated as PF, are established to support existing and proposed public and institutional uses on publicly owned, leased or operated property, including publicly owned land with uses managed and/or operated by a non-profit entity. The PF district implements and is consistent with the Public Facilities land use classification of the Castro Valley General Plan.

B.

Permitted Uses. The following principal uses are permitted in a PF district:

1.

Clinic;

2.

Indoor recreation facility;

3.

Office;

4.

Orchard, garden;

5.

Public or private riding or hiking trails;

6.

Parking lot;

7.

Public agency facilities;

8.

Public education facilities;

9.

Public school district facilities;

10.

Public transit stations;

11.

Public utility and substation;

12.

Radio and television transmission facilities;

13.

Railroad or trucking terminal facility; and

14.

Utility use.

C.

Conditional Uses. In addition to the uses listed in Sections 17.52.480 and 17.52.580, the following are conditional uses in PF districts, and are permitted only if approved by the board of zoning adjustments as provided in Section 17.54.130:

1.

Unattended collection box(es) placed in conjunction with an approved community facility as defined in Section 17.04.010; and

2.

Service yards for public agency, public education, or public school district facilities.

D.

Floor Area Ratio. The floor area ratio shall not exceed one and one-half.

E.

Yards. The yard requirements in PF districts are as follows, subject to the general provisions of Section 17.52.330:

1.

Depth of front yard: Not less than twenty (20) feet.

2.

Depth of rear yard: Not less than twenty (20) feet.

3.

Width of side yard: Not less than five feet.

F.

Height of Buildings. Height must not exceed forty-five (45) feet except as otherwise provided in Section 17.52.090.

G.

Site Development Review. Site development review in compliance with Section 17.54.210 required for any project over 1,000 square feet.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Open space-natural districts, hereinafter designated as OS-N, are established to provide for natural open spaces that have been identified for permanent conservation, typically established as part of PUDs as permanent easements. The OS-N district implements and is consistent with the open-space-natural land use classification of the Castro Valley General Plan.

B.

Permitted Uses. The following principal uses are permitted in an OS-N district:

1.

Trails, wildlife preserves, and open space uses that maintain the site in its natural state.

C.

No Net Loss. Concurrent with or prior to a rezoning of property from open space-natural zone to another zone, an area at least equivalent in size and providing greater habitat value than the subject open space-natural zone area shall be rezoned from another zone to the open space-natural zone.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. Open space-parks districts, hereinafter designed as OS-P, are established to provide for current and expected future locations for public parks of all sizes and types in the community. The OS-P district implements and is consistent with the open-space-parks land use classification of the Castro Valley General Plan.

B.

Permitted Uses. The following principal uses are permitted in an OS-P district:

1.

Administrative support and service facilities of a public regional recreation district;

2.

Orchard, garden;

3.

Outdoor recreation facility; and

4.

Public or private riding or hiking trails.

C.

Conditional Uses. The following are conditional uses and are permitted in an OS-P district only if approved by the planning commission, sitting as a board of zoning adjustments, as provided in Sections 17.54.135 and 17.34.010:

1.

Community facility; and

2.

Temporary uses.

D.

Height of Buildings. Height must not exceed thirty (30) feet, except as otherwise provided in Section 17.52.090.

(Ord. No. 2020-66, § 13, 12-15-20)

A.

Intent. School districts, hereinafter designed as SCV, are established to provide for publicly-owned or operated educational facilities of all sizes serving all age groups, and for sites owned or used by school districts for school related purposes, including operation by a private education facility. The SCV district implements and is consistent with the SCHOOLS land use classification of the Castro Valley General Plan.

B.

Permitted Uses. The following principal uses are permitted in a SCV district:

1.

Public educational facilities;

2.

Schools, attendance at which satisfies the requirements of the compulsory education law of state; and

3.

Community facilities.

C.

Conditional Use. The following are conditional uses and are permitted in an SCV district only if approved by the planning commission, sitting as a board of zoning adjustments, as provided in Sections 17.54.135 and 17.34.010:

1.

Unattended collection box(es) placed in conjunction with an approved community facility.

2.

Accessory uses.

3.

Outdoor and indoor recreation facility is an accessory use to a principal school use.

D.

Yards. The yard requirements in SCV districts are the same as those of adjacent zones, subject to the general provisions of Section 17.52.330.

E.

Height of Buildings. The height must be the same as those of adjacent zones except as otherwise provided in Section 17.52.090.

F.

Property no Longer Needed for School Purposes. Property in the SCV district determined to no longer be needed for educational purposes may be developed as residential uses pursuant to approval of a Planned Development District (Chapter 17.18, PD Districts) or adoption of a Specific Plan:

1.

Density shall be equal to or lower than the surrounding residential units.

2.

Any private development proposed on a former school site shall incorporate on site a feature intended to serve as a benefit to the community, such as a park, playground, trail easement, athletic field, public plaza, community meeting facility, or child care center.

a.

The feature shall remain accessible to the public. The scale of the community benefit shall be commensurate with the size of the parcel and the intensity of the proposed development.

b.

Decisions regarding the type of feature to be provided and its design shall take into consideration public input and shall be coordinated with relevant public entities that will be involved in its operation and maintenance.

(Ord. No. 2020-66, § 13, 12-15-20)