Chapter 17.20 — R-1 RESIDENTIAL ONE-FAMILY ZONE

The residential one-family or R-1 zone is intended to be applied in areas of the city where topography, access, utilities, public services and general conditions make the areas suitable and desirable for single- family home development. This district permits a variable minimum lot size to be established upon zoning of the project site, as a means to provide greater variation in residential environments. The regulations of this chapter and the provisions of Chapter 17.76 shall apply in all residential one-family or R-1 zones.

(Ord. 2007-05 § 3 (part))

Principal permitted uses in the R-1 zone are as follows:

A.

One single-family dwelling;

B.

Crop and tree farming;

C.

Second dwellings in accordance with the provisions of Section 17.76.130;

D.

Renting of one room to not more than two persons not employed on the premises;

E.

Yard sales as defined and permitted in Section 17.76.160;

F.

Domestic pets and other animals and fowl may be kept in conformity with health department standards;

G.

Pre-manufactured structures in accordance with the provisions of Section 17.76.120;

H.

Patio covers and shade structures that satisfy the provisions of Section 17.20.060(F);

I.

Small family day care homes;

J.

Large family day care homes subject to the provisions of Section 17.76.070;

K.

Community care facilities with six or less persons as provided by California H&S Code Section 1569.13;

L.

Tract sales offices in conjunction with sale of lots in a subdivision subject to provisions of Section 17.76.140;

M.

Agricultural worker housing;

N.

Supportive housing:

O.

Transitional housing.

P.

Accessory dwelling units and junior accessory dwelling units subject to the provisions of Section 17.76.130.

(Ord. 2007-05 § 3 (part))

(Ord. No. 2014-02, § II; Ord. No. 2018-03, Exh. A; Ord. No. 2019-05; Ord. No. 2020-06, (Exh. B))

Administratively permitted uses in an R-1 zone are as follows:

A.

Accessory structures typically occurring in residential areas;

B.

Home occupations in accordance with the provisions of Section 17.76.060;

C.

One detached storage building or garage in accordance with the provisions of Section 17.20.060(E).

D.

Crop and tree farming between two and ten (10) acres in size. Must comply with the city's administrative guidelines for implementation of general plan agricultural buffering policies.

E.

Electric vehicle charging stations.

(Ord. 2007-05 § 3 (part))

(Ord. No. 2019-05; Ord. No. 2022-02, Exh. A; Ord. No. 2025-03, Exh. A)

Conditional use permits requiring use permits in the R-1 zone are as follows:

A.

Guest houses and servants' quarters;

B.

Public and private noncommercial recreational facilities;

C.

Public and private schools, churches, public parks, public buildings, and golf courses;

D.

Bed and breakfasts;

E.

Communication towers and support facilities in accordance with the provisions of Chapter 17.85;

F.

Public utility buildings and uses;

G.

Private institutions, including private schools, day care centers, rest homes, sanitariums, convalescent homes, homes for the elderly and similar operations;

H.

Home occupations not consistent with the provisions of Section 17.76.060;

I.

Mobile home parks and subdivisions subject to a minimum of six thousand (6,000) square feet for each space or lot;

J.

Temporary dwelling for the convalescence of the immediate family members in accordance with the provisions of Section 17.76.040.

K.

Crop and tree farming between eleven (11) and twenty (20) acres in size. Must comply with the city's administrative guidelines for implementation of general plan agricultural buffering policies.

(Ord. 2007-05 § 3 (part))

(Ord. No. 2019-05)

A.

Upon zoning of a residential project an area designation shall be selected using either, R-1, R-1 10,000, R-1 15,000, or R-1 20,000. The zoning map shall show the approved lot area designation.

B.

Lot requirements in the R-1 zones are as follows:

R-1 R-1 R-1 R-1
10,000 15,000 20,000

Minimum lot 6,000 10,000 15,000 20,000 area

Minimum lot 7,000 10,000 15,000 20,000 area corner lot

Minimum lot 60 feet 80 feet 90 feet 100 feet width

Minimum corner 70 feet 80 feet 90 feet 100 feet lot width

C.

Maximum lot depth; three times lot width.

D.

Maximum building coverage: forty (40) percent.

(Ord. 2007-05 § 3 (part))

Design requirements for structures in the R-1 zone are as follows:

A.

Minimum building width: twenty (20) feet;

B.

Minimum roof slope: 3:12;

C.

Minimum roof eave overhang, twelve (12) inches;

D.

An enclosed garage for at least two cars shall be provided for all new residential construction. The garage shall be at least twenty (20) feet by twenty (20) feet with a minimum sixteen-foot-wide garage door. The garage shall be equipped with a dedicated 208/240 volt electrical outlet to allow for installation of a Level 2 electric vehicle charging station. Driveway access shall be paved;

E.

A single detached storage or shop building shall meet the following criteria:

The structure shall conform to the maximum building coverage requirements;

The height of the structure shall not exceed twenty-five (25) feet;

The roof pitch and construction materials of the accessory structure shall be similar to that of the primary structure;

Shall not be located in any required front yard (closest to the front property line) or in front of the primary structure;

Consistent with setbacks for this zone district;

Shall not be occupied for living purposes; and

Shall be constructed to prevent stormwater runoff to adjacent properties. The property owner shall install, monitor, and maintain measures to ensure proper drainage of stormwater.

F.

Patio covers and shade structures shall meet the following criteria. Those not meeting this criteria shall meet the yard, height and design criteria for main buildings:

Set back a minimum of four feet from the rear and side yard property line;

Open on at least two sides;

Maximum height: twenty-five (25) feet; and

Minimum six-foot spacing on support posts shall be provided.

G.

Heating and air conditioning units may be located in the side yard of those lots where a dwelling exists at the time of adoption of the ordinance codified in this chapter.

H.

At a minimum, the following landscaping is required:

The required front yard shall be landscaped and not used for parking. The only area not landscaped within the required front yard is the driveway access to the required parking area, which shall not exceed twenty- five (25) feet in width;

Landscaping within the front setback area shall include one, fifteen (15) gallon-sized tree for each fifty (50) feet of frontage. At least one of the trees must be planted within seven feet of the sidewalk. At least one gallon-sized shrub must be planted for each five feet of frontage;

In addition to the required trees and shrubs, the landscaped area may shall also be planted with turf or ground cover plants. Turf shall be limited to twenty-five (25) percent or less of the total yard area for water conservation purposes. Live ground cover plants shall be planted on fifty (50) percent or more of the yard area;

Turf shall not be planted on sloped areas which exceed a slope of one-foot vertical elevation change for every four feet of horizontal length.

Climate adapted plants that require occasional to no summer water (average WUCOLS plant factor 0.3*) shall be planted for seventy-five (75) percent of the plant area. Use of flowering plant varieties known to benefit honeybees is encouraged;

Other decorative non-plant ground covers may be used as long as they do not exceed twenty-five (25) percent of this landscaped area. Gravel, colored rock, walk-on bark, and similar materials shall be used in combination with the live groundcover in all non-turf areas as a mulch to control weeds and conserve or retain water until a living groundcover has achieved full coverage;

All plants utilized for landscaping must be planted either directly into the native soil of the front yard, or, if compostable pots are used and it is so desired, the compostable pot may be planted into the soil along

with the plant;

A minimum three-inch layer of mulch shall be applied on all remaining exposed soil surfaces;

Where landscaping is provided, adequate irrigation and maintenance thereof shall be provided, including replacement of dead trees, shrubs, vines or other ground cover required pursuant to this section.

*WUCOLS: Water Use Classification of Landscape Species published by the University of California Cooperative Extension and the Department of Water Resources 2014.

(Ord. 2007-05 § 3 (part))

(Ord. No. 2015-01, § 1(Exh. A); Ord. No. 2020-04 (Exh. A); Ord. No. 2022-02, Exh. A; Ord. No. 2025-03, Exh. A)

A.

Minimum yards in the R-1 zone are as follows:

Main building:

Front: twenty (20) feet;

Rear: twenty (20) feet;

Side: five feet. Side setback on a corner lot facing the street shall not be less than twenty (20) feet.

Accessory structures:

Front: twenty (20) feet.

Rear: four feet, unless otherwise specified herein.

Side: four feet, unless otherwise specified herein.

B.

Exceptions to the minimum yards established above are as follows:

Detached accessory buildings shall not be located within five feet of any other structure, nor encroach on any easement. Accessory buildings attached to main buildings shall be structurally a part thereof and shall comply with main building yard and setback requirements.

If the property abuts a public alley, the rear setback shall be as detailed in Table: R-1 Structure Setbacks of this section.

The rear setback for a detached garage that meets the following requirements shall be as detailed in Table: R-1 Structure Setbacks of this section:

a.

The height shall not exceed twenty-five (25) feet;

b.

The roof pitch and construction materials of the garage shall be similar to that of the primary structure.

Where more than one-half of the block is occupied with buildings, the required front yard may be reduced to the average of those of the improved sites, but in no case shall be less than twelve (12) feet.

Outdoor swimming pools and spas located within ten (10) feet of any side yard, rear yard or structure, shall be set back from said side yard, rear yard of structure a distance equal to the depth of the pool within said ten-foot area, but in no instance shall the setback be less than five feet. Pools and spas shall not be located in a required front yard.

Setbacks for all other garages or accessory structures not otherwise described herein shall be as detailed in Table: R-1 Structure Setbacks of this section.

See Section 17.76.190, fence standards, for fence height and setback regulations.

Detached accessory structures under one hundred-twenty (120) square feet in size, less than six feet in height, and not requiring a building permit are not subject to setback standards.

R-1 STRUCTURE SETBACKS

Yard Structure Setback

Front House/Main Building 20

Accessory Structures:

Garage 20

Pool or Spa Not allowed

All Other Accessory Structures Not allowed

Side House/Main Building 5 (interior lot) Accessory Structures:

Garage 5

Patio Covers and Shade Structures 4

All Other Accessory Structures:

120 square feet or less, below 6 feet in height, Zero
and not requiring a building permit

Structure between 6 feet and 15 feet in height 4 (regardless of square footprint)

Structure between 15 feet and 25 feet in height Minimum 4 ft. setback, plus 1 ft.
(regardless of square footprint) for each additional foot above 15
ft.

House facing side yard 25

Side yard House/Main Building 20 facing street Garage (at same front plane as house) 20 (corner lot) Garage (behind rear plane of house, with alley 10 access only)

Accessory structure (side of house) 10

Accessory structure (behind rear plane of house) 4

Rear House/Main Building 20

Garage (detached, no alley) 10

Garage (on alley) Zero, if min. 24' backup available
into alley

Garage or accessory structure in rear yard abutting Zero
land on which no structure can be built (example:
abutting US Bureau of Reclamation ditch right-of-
way)

Patio covers and shade structures 4

Accessory structure (on alley) Zero

Accessory structure (no alley):

120 square feet or less, below 6 feet in height, Zero
and not requiring a building permit

Structure between 6 feet and 15 feet in height 4 (regardless of square footprint)

Structure between 15 feet and 25 feet in height Minimum 4 ft. setback, plus 1 ft.
(regardless of square footprint) for each additional foot above 15
ft.

(Ord. 2007-05 § 3 (part))

(Ord. No. 2015-01, § 1(Exh. A); Ord. No. 2021-01, (Att. B); Ord. No. 2025-03, Exh. A)

Maximum building height in the R-1 zone is thirty-five (35) feet except where otherwise restricted herein for specified accessory buildings.

(Ord. No. 2015-01, § 1(Exh. A))