Chapter 18.21
Residential Zoning Districts

Sections:

18.21.010    Purpose

18.21.020    Purposes of the Residential Zoning Districts

18.21.030    Residential District Allowable Land Uses and Permit Requirements

18.21.040    Residential District Subdivision Standards

18.21.050    Residential District Site Planning and Building Standards

18.21.060    Commercial Uses in Residential Zoning Districts

18.21.010 - Purpose

This Chapter lists the land uses that may be allowed within the residential zoning districts established by § 18.14.020 (Zoning Map and Zoning Districts), determines the type of planning permit/approval required for each use, and provides basic standards for site layout and building size.

(Ord. 930, § 2, passed 06-12-2017)

18.21.020 - Purposes of the Residential Zoning Districts

The purposes of the individual residential zoning districts and the manner in which they are applied are as follows.

A.    RR (Rural Residential) zoning district. The RR zoning district is applied to areas on the northern fringes of the City that are appropriate for single-family dwellings in a semi-rural environment that can also accommodate lower intensity agricultural land uses. The maximum allowable residential density within the RR district ranges from 1 dwelling unit per 5 acres to 1 dwelling unit per acre, with the maximum density allowed on specific property being identified on the Zoning Map by means of a numerical suffix to the RR zoning district symbol (see § 18.21.040 - Residential District Subdivision Standards). The RR zoning district implements and is consistent with the RR land use designations of the Inland General Plan.

B.    RS (Suburban Residential) zoning district. The RS zoning district is applied to areas of the City that are appropriate for single-family dwellings, but where infrastructure limitations and/or environmental constraints limit the ability for development to achieve urban densities. The maximum allowable residential density within the RS district ranges from 1 to 3 dwelling units per acre, with the maximum density allowed on specific property being identified on the Zoning Map by means of a numerical suffix to the RS zoning district symbol (see § 18.21.040 - Residential District Subdivision Standards). The RS zoning district implements and is consistent with the RS land use designation of the Inland General Plan.

C.    RL (Low Density Residential) zoning district. The RL zoning district is applied to areas of the City that are appropriate for neighborhoods of single-family dwellings on standard urban lots, surrounding the more densely developed core of the City. This zone also allows limited, neighborhood serving commercial uses on small, appropriately located individual parcels, or as small, pedestrian-oriented neighborhood centers. The maximum allowable residential density within the RL district ranges from 3 to 6 dwelling units per acre; the maximum floor area ratio (FAR) for nonresidential uses is 0.40. The RL zoning district implements and is consistent with the RL land use designation of the Inland General Plan.

D.    RM (Medium Density Residential) zoning district. The RM zoning district is applied to areas of the City that are appropriate for neighborhoods with a variety of housing types located in proximity to parks, schools, and public services. This zone also allows limited, neighborhood serving commercial uses on small, appropriately located individual parcels, or as small, pedestrian-oriented neighborhood centers. The maximum allowable residential density within the RM district ranges from 6 to 12 dwelling units per acre; the maximum floor area ratio (FAR) for nonresidential uses is 0.40. The RM zoning district implements and is consistent with the RM land use designation of the Inland General Plan.

E.    RH (High Density Residential) zoning district. The RH zoning district is applied to areas of the City that are appropriate for a variety of higher density housing types, primarily on larger parcels where innovative site design can provide the desired mixture of housing types, aesthetic and functional open space areas, and other features that enhance the development and neighborhood. This zone also allows limited, neighborhood serving commercial uses on small, appropriately located individual parcels, or clusters of retail establishments. The maximum allowable residential density within the RH district ranges from 10 to 15 dwelling units per acre; the maximum floor area ratio (FAR) for nonresidential uses is 0.40. The RH zoning district implements and is consistent with the RH land use designation of the Inland General Plan.

F.    RVH (Very High Density Residential) zoning district. The RVH zoning district is applied to areas of the City that are appropriate for high density multifamily housing near commercial areas and public services. This zone also allows limited, neighborhood serving commercial uses on small, appropriately located individual parcels or clusters of retail establishments. The maximum allowable residential density within the RVH district ranges from 12 to 24 dwelling units per acre; the maximum floor area ratio (FAR) for nonresidential uses is 0.40. The RVH zoning district implements and is consistent with the RVH land use designation of the Inland General Plan.

(Ord. 930, § 2, passed 06-12-2017)

18.21.030 - Residential District Allowable Land Uses and Permit Requirements

A.    General permit requirements. Table 2-1 identifies the uses of land allowed by this Development Code in each residential zoning district, and the planning permit required to establish each use, in compliance with § 18.20.030 (Allowable Land Uses and Planning Permit Requirements).

B.    Requirements for certain specific land uses. Where the last column in Table 2-1 (“Specific Use Regulations”) includes a section number, the referenced section may affect whether the use requires a Zoning Clearance, Minor Use Permit, or Use Permit, and/or may establish other requirements and standards applicable to the use.

TABLE 2-1 Allowed Land Uses and Permit Requirements for Residential Zoning Districts	P	Permitted use, Zoning Clearance required
	MUP	Minor Use Permit required (see § 18.71.060)
	UP	Use Permit required (see § 18.71.060)
	S	Permit requirement set by Specific Use Regulations
	—	Use not allowed
LAND USE (1)	PERMIT REQUIRED BY DISTRICT						Specific Use Regulations
	RR	RS	RL	RM	RH	RVH
AGRICULTURAL, RESOURCE AND OPEN SPACE USES
Agricultural accessory structure	P	P	–	–	–	–	18.42.030
Animal keeping	S	S	S	S	S	S	18.42.040
Crop production, horticulture, orchard, vineyard	P	P	P	P	P	P
RECREATION, EDUCATION AND PUBLIC ASSEMBLY USES
Equestrian facility	UP	–	–	–	–	–
Meeting facility, public or private	UP	UP	UP	UP	UP	UP
Park, playground	P	P	P	P	P	P
Private residential recreation facility	UP	UP	MUP	MUP	MUP	MUP
School - Private	UP	UP	UP	UP	UP	UP
School - Public	P	P	P	P	P	P

Key to Zoning District Symbols
RR	Rural Residential	RM	Medium Density Residential
RS	Suburban Residential	RH	High Density Residential
RL	Low Density Residential	RVH	Very High Density Residential

Notes:

(1)    See Article 10 for land use definitions.

TABLE 2-1 Allowed Land Uses and Permit Requirements for Residential Zoning Districts	P	Permitted use, Zoning Clearance required
	MUP	Minor Use Permit required (see § 18.71.060)
	UP	Use Permit required (see § 18.71.060)
	S	Permit requirement set by Specific Use Regulations
	—	Use not allowed
LAND USE (1)	PERMIT REQUIRED BY DISTRICT						Specific Use Regulations
	RR	RS	RL	RM	RH	RVH
RESIDENTIAL USES
Condominium conversion - 3 units maximum per parcel	–	–	–	P	UP	UP
Duplex	P	P	P	P	P	P	18.42.170 18.42.200
Home occupation	P	P	P	P	P	P	18.42.080
Manufactured home	P	P	P	P	P	P	18.42.110
Multifamily housing, 3 units	–	–	–	P	P	P	18.42.120
Multifamily housing, 4 or more units	–	–	–	UP	UP	P	18.42.120
Co-housing, 4 or more units	–	–	–	UP	UP	P	18.42.120
Organizational housing/care facility (sorority, monastery, residential care, etc.) of more than 3,000 SF or 3 units	–	–	–	UP	UP	UP
Primary residential unit	P	P	P	P	P	P
Residential accessory use or structure	P	P	P	P	P	P	18.42.160
Residential care facility for the elderly (RCFE)	–	–	–	UP	UP	UP
Second unit – ADU/JADU	P	P	P	P	P	P	18.42.170
Tiny home	P	P	P	P	P	P	18.42.175
Tiny home/manufactured home community	–	–	UP	UP	UP	UP	18.42.110
Single residential unit	P	P	P	P	P	P
Urban unit development (4 units)	P	P	P	–	–	–	18.42.200
Urban unit development (2 units) on a parcel created through an urban lot split	P	P	P	–	–	–	18.42.200 18.84.045
RETAIL TRADE AND GENERAL SERVICES
Accessory retail and services	–	–	–	P	P	P	18.42.020
Artisan shop	–	–	–	UP	UP	UP
Neighborhood market	–	–	UP	UP	UP	UP	18.21.060
Restaurant, cafe, coffee shop	–	–	UP	UP	UP	UP	18.42.165
Outdoor Dining	–	–	MUP	MUP	MUP	MUP	18.42.165

Key to Zoning District Symbols
RR	Rural Residential	RM	Medium Density Residential
RS	Suburban Residential	RH	High Density Residential
RL	Low Density Residential	RVH	Very High Density Residential

Notes:

(1)    See Article 10 for land use definitions.

TABLE 2-1 Allowed Land Uses and Permit Requirements for Residential Zoning Districts		P	Permitted use, Zoning Clearance required
		MUP	Minor Use Permit required (see § 18.71.060)
		UP	Use Permit required (see § 18.71.060)
		S	Permit requirement set by Specific Use Regulations
		—	Use not allowed
LAND USE (1)		PERMIT REQUIRED BY DISTRICT						Specific Use Regulations
		RR	RS	RL	RM	RH	RVH
SERVICES - BUSINESS AND PROFESSIONAL (2)
Medical services - Clinic, lab, urgent care		—	—	—	UP	UP	UP
Medical services - Doctor office		—	—	—	UP	UP	P	18.21.060
Medical services - Extended care		—	—	—	UP	UP	UP
Medical services - Hospital		—	—	—	UP	UP	UP
Office - Accessory		P	P	P	P	P	P
Office - Professional or administrative		—	—	—	—	—	UP	18.21.060
SERVICES
Day care, adult - 6 or fewer clients		MUP	MUP	MUP	MUP	MUP	MUP
Day care, adult - 7 or more clients		—	—	—	UP	UP	UP
Day care, child - Small family day care home		P	P	P	P	P	P
Day care, child - Large family day care home		MUP	MUP	MUP	MUP	MUP	MUP	18.42.060
Day care, child - Day care center		—	—	—	MUP	MUP	MUP	18.42.060
Mortuary, funeral home (not including cremation)		—	—	—	—	—	UP
Personal services		—	—	UP	UP	UP	UP	18.21.060
Public safety facilities		UP	UP	UP	UP	UP	UP
TRANSPORTATION, COMMUNICATIONS AND INFRASTRUCTURE
Pipelines, transmission lines		S	S	S	S	S	S	18.42.145
Utility facility		UP	UP	UP	UP	UP	UP
Roof mounted solar and wind for on-site use		P	P	P	P	P	P
Utility infrastructure		P	P	P	P	P	P

Key to Zoning District Symbols
RR	Rural Residential	RM	Medium Density Residential
RS	Suburban Residential	RH	High Density Residential
RL	Low Density Residential	RVH	Very High Density Residential

Notes:

(1)    See Article 10 for land use definitions.

(2)    A doctor’s office or professional or administrative office may be approved in a residential zoning district only on a site that is adjacent to or separated only by a street or alley from a commercial or industrial zoning district.

(Ord. 930, § 2, passed 06-12-2017; Am. Ord. 959, § 2, passed 02-10-2020; Am. Ord. 980, § 2, passed 04-25-2022; Am. Ord. 985, § 2, passed 03-25-2024; Am. Ord. 986, § 2, passed 03-25-2024; Am. Ord. 988, § 2, passed 05-13-2024; Am. Ord. 992, § 3, passed 07-08-2024; Am. Ord. 993, § 3, passed 07-08-2024)

18.21.040 - Residential District Subdivision Standards

A.    Each subdivision shall comply with the minimum parcel size requirements shown in Table 2-2 for the applicable zoning district.

B.    The minimum parcel size requirements for a specific subdivision are determined by the review authority as part of subdivision approval. The review authority may require 1 or more parcels within a specific subdivision to be larger than the minimums required by this table based on potential environmental impacts, the physical characteristics of the site or surrounding parcels, and/or other factors.

C.    A condominium or other common interest project may be subdivided with smaller parcels for ownership purposes, with the minimum lot area determined through subdivision review; provided, that the overall development site complies with the minimum parcel size, and the total number of any dwellings complies with the maximum density for the applicable zone.

TABLE 2-2 - MINIMUM PARCEL SIZE STANDARDS

Zoning District	Minimum Parcel Size
	Minimum Area (1)	Minimum Width	Minimum Depth	Maximum Depth
RR-1 through RR-5	As shown by the numerical suffix to the RR symbol on the Zoning Map, with the number in the suffix indicating the minimum lot area in acres.	200 ft, or more as determined by the review authority for a parcel larger than 3 acres;   100 ft for a parcel smaller than 3 acres.	200 ft	N.A.
RS	40,000 sf	100 ft	200 ft	N.A.
RS-15	15,000 sf	100 ft	100 ft	N.A.
RL	6,000 sf, but no more than 6 parcels per net acre	50 ft	100 ft	3 times width
RM	6,000 sf, but no more than 12 parcels per net acre	50 ft	75 ft	3 times width
RH	Determined by the review authority during the subdivision process, consistent with the General Plan.
RVH	Determined by the review authority during the subdivision process, consistent with the General Plan.

Notes:

(1)    Minimum parcel areas shall be considered net acreage as defined in § 18.100.020(N).

(Ord. 930, § 2, passed 06-12-2017)

18.21.050 - Residential District Site Planning and Building Standards

Subdivisions, new land uses and structures, and alterations to existing land uses and structures, shall be designed, constructed, and established in compliance with the requirements in Tables 2-4 and 2-5, in addition to the applicable standards (e.g., landscaping, parking and loading, etc.) in Article 3.    

TABLE 2-4 - RR, RS, AND RL DISTRICT DEVELOPMENT STANDARDS 

Development Feature	Requirement by Zoning District
	RR Rural Residential	RS Suburban Residential	RL Low Density Residential
Density	Maximum number of dwelling units allowed on a single parcel.
	1 dwelling unit or 1 duplex per parcel; or 1 dwelling unit and 1 second unit and 1 JADU where allowed by § 18.42.170; or 2 to 4 units, where allowed, by § 18.42.200.
Setbacks	Minimum setbacks required. See § 18.30.100 for exceptions, reductions, and encroachments. See Chapter 18.42 for setback requirements applicable to a specific land use.
Front	25 ft		20 ft, but no closer than 25 ft to the street right-of-way or the edge of pavement, whichever is closer
Side - Interior (each)	20 ft	10 ft	5 ft
Side - Street side	Same as front setback		10 ft
Rear	20 ft		10 ft
Garage	5 ft back from street-facing facade of primary structure
Accessory structures	See §§ 18.42.030 (Agricultural Accessory Structures) and 18.42.160 (Residential Accessory Uses and Structures)
Site coverage	Maximum percentage of the total lot area that may be covered by impervious surfaces. See § 18.42.170 for accessory dwelling units/junior accessory dwelling units exemption.
Maximum coverage	10,000 sf	25%	40%
Additional coverage	The maximum coverage above may be increased by 10% with Minor Use Permit approval, with the review and approval of a drainage plan by the Director of Public Works.
Floor area ratio (FAR)	Maximum floor area ratio for nonresidential structures. FAR does not apply to residential structures.
Maximum FAR	N.A.		0.40
Height limit	Maximum allowable height of structures. See § 18.30.060 for height measurement requirements, and height limit exceptions. See Chapter 18.42 for height limits applicable to a specific land use.
Maximum height	28 ft
Fencing	See § 18.30.050 (Fences, Walls, and Screening)
Landscaping	See Chapter 18.34 (Landscaping Standards)
Parking	See Chapter 18.36 (Parking and Loading)
Signs	See Chapter 18.38 (Signs)

 

TABLE 2-5 - RM, RH, AND RVH DISTRICT DEVELOPMENT STANDARDS

Development Feature	Requirement by Zoning District
	RM Medium Density Residential	RH High Density Residential	RVH Very High Density Residential
Density	Minimum and maximum number of dwelling units allowed on a single parcel. See § 18.42.170 for accessory dwelling units/junior accessory dwelling units exemption.
Minimum and maximum	6 to 12 units per acre	10 to 15 units per acre (1)	12 to 24 units per acre (1)
Setbacks	Minimum setbacks required. See § 18.30.100 for exceptions, reductions, and encroachments. See Chapter 18.42 for setback requirements applicable to a specific land use.
Front	20 ft, but no closer than 25 ft to a City street
Side - Interior (each)	5 ft	5 ft; except 10 ft for single-story and 20 ft for multi-story buildings of 3 or more units on a site abutting an RS or RL zone.
Side - Street side	10 ft
Rear	10 ft	10 ft	20 ft abutting an RS or RL zone, 10 ft elsewhere.
Garage	5 ft back from street-facing facade of primary structure
Accessory structures	See §§ 18.42.030 (Agricultural Accessory Structures) and 18.42.160 (Residential Accessory Uses and Structures).
Site coverage	Maximum percentage of the total lot area that may be covered by impervious surfaces. See § 18.42.170 for accessory dwelling units/junior accessory dwelling units exemption.
Maximum coverage	50%	75%	90%
Additional coverage	An additional 10% of lot area may be covered with Minor Use Permit approval, with the review and approval of a drainage plan by the Director of Public Works.	An additional 10% of lot area may be covered with Minor Use Permit approval, with the review and approval of a drainage plan by the Director of Public Works.
Floor area ratio (FAR)	Maximum floor area ratio for nonresidential structures. FAR does not apply to residential structures.
Maximum FAR	0.40
Height limit	Maximum allowable height of structures. See § 18.30.060 for height measurement requirements, and height limit exceptions.
Maximum height	35 ft	35 ft	45 ft
Fencing	See § 18.30.050 (Fences, Walls, and Screening)
Landscaping	See Chapter 18.34 (Landscaping Standards)
Parking	See Chapter 18.36 (Parking and Loading)
Signs	See Chapter 18.38 (Signs)

Notes:

(1)    A proposed residential project shall not be proposed at less than the minimum density provided for the applicable zoning district.

(Ord. 930, § 2, passed 06-12-2017; Am. Ord. 959, § 2, passed 02-10-2020; Am. Ord. 985, § 2, passed 03-25-2024; Am. Ord. 986, § 2, passed 03-25-2024)

18.21.060 - Commercial Uses in Residential Zoning Districts

A.    Applicability. The standards in this Section apply to agricultural, resource, and open space uses, retail trade, and business and professional service uses identified by § 18.21.030, Table 2-1, as allowable within a residential zoning district and subject to the requirements of this Section.

B.    Retail uses. A neighborhood market, restaurant, cafe, or coffee shop shall comply with the following standards:

1.    Site planning. Each proposed site shall be planned to provide pedestrian orientation and the buffering of on-site nonresidential activities from adjacent residential development. No parking shall be located between buildings and a public street.

2.    Limitation on floor area. No individual use shall exceed a total floor area of 10,000 square feet.

3.    Hours of operation. A commercial use that is subject to this Section shall be open for business only during the hours from 7:00 a.m. to 8:00 p.m., unless other hours are specifically authorized by the Use Permit approval for the project.

(Ord. 930, § 2, passed 06-12-2017)