The RS district classification is intended to be applied in appropriate locations to allow residential developments of varying population density to meet the housing needs of present and future population in the unincorporated area in accordance with the county's general plan. RS districts will be located within established urban areas where existing urban services and facilities are adequate to serve the intended development. Limited RS development is intended to assist in the preservation of the natural and agricultural resources of the county. The RS district is also intended to serve the following purposes:

A.

To regulate the density of population;

B.

To promote stability of residential development;

C.

To conserve the value of land and buildings;

D.

To regulate the bulk of buildings;

E.

To provide for open space in residential areas.

(Ord. 551 § 12 (part), 1977: prior code 12300)

The following uses may be allowed in all RS districts without a use permit:

A.

One single-family dwelling unit per legal lot;

B.

Accessory dwelling units and one junior accessory dwelling unit, providing that all of the conditions set forth in Section 18.104.180 are met;

C.

Family day care homes (small);

D.

Family day care homes (large) subject to Section 18.104.070;

E.

Residential care facilities (small and medium);

F.

Private schools (home instruction) subject to compliance with criteria specified in Section 18.104.160;

G.

Minor antennas meeting the requirements of Sections 18.119.240 through 18.119.260;

H.

Telecommunication facilities, other than satellite earth stations, which consist solely of wall-mounted antenna and related interior equipment and meet the performance standards specified in Section 18.119.200, provided that prior to issuance of any building permit, or the commencement of the use if no building permit is required, the director or their designee has issued a site plan approval pursuant to Chapter 18.140;

I.

Floating dock which complies with all of the following:

1.

Is accessory to a residential use otherwise permitted by this chapter without a use permit,

2.

Any portion located on a navigable waterway is determined by the Napa County Flood Control and Water Conservation District engineer to not obstruct seasonal flood flows, and

3.

In operation is located adjacent and parallel to, and does not exceed in length the water frontage of the legal parcel or contiguous legal parcels owned by the owner of the floating dock;

J.

Maintenance and emergency repairs of legally-created levees, subject to compliance with Chapter 16.04 of this code;

K.

Farmworker housing providing accommodations for six or fewer employees and otherwise consistent with Health and Safety Code Section 17021.5 or successor provisions, subject to the conditions set forth in Sections 18.104.300 and 18.104.310, as applicable; and

L.

Supportive housing and transitional housing shall be considered a residential use of property and shall be subject only to those restrictions that apply to other residential dwellings of the same type in the RS zone.

M.

Two-unit developments pursuant to Section 18.104.440 and urban lot splits pursuant to Chapter 17.17.

(Ord. No. 1323, § 14, 6-23-2009; Ord. 1144 § 3, 1998; Ord. 1097 § 36, 1996; Ord. 900 § 3, 1988; Ord. 892 § 4 (part), 1988; Ord. 867 § 12, 1988: Ord. 816 § 10, 1986; Ord. 766 § 1, 1984: Ord. 551 § 12 (part), 1977: prior code 12301)

(Ord. No. 1495, § 23, 9-24-2024)

The following uses may be permitted in all RS districts but only upon grant of a use permit pursuant to Section 18.124.010:

A.

Outdoor parks and recreation facilities compatible with agriculture and residences;

B.

Residential care facilities (medium) subject to Section 18.104.170;

C.

Residential care facilities (large) subject to Section 18.104.170;

D.

Child day care centers;

E.

Private schools (institutional) subject to compliance criteria specified in Section 18.104.160;

F.

Telecommunication facilities, other than allowed under subsection (H) of Section 18.52.020, that must, for demonstrated technical reasons acceptable to the director, be located within a residential single (RS), residential multiple (RM), residential country (RC), or planned development (PD) zoning district; and

G.

Residential care facilities, large, subject to Section 18.104.170.

(Ord. 1097 § 37, 1996: Ord. 961 § 1, 1990: Ord. 892 § 4 (part), 1988: Ord. 816 § 11, 1986: Ord. 551 § 12 (part), 1977: prior code 12302)

(Ord. No. 1370, § 23, 3-20-2012; Ord. No. 1495, § 24, 9-24-2024)

In the RS district:

Upon approval of a use permit per Section 18.124.010 a second single-family dwelling unit may be built on lots in the RS district in conformity with the following standards:

A.

Use permits will be granted under this section only for lots created prior to the effective date of the ordinance codified in this chapter, the depth of which exceeds the width by a ratio of at least 2½:1.

B.

No parcel may be developed under this section if it is capable of being subdivided into parcels of standard lot area served by a public street.

C.

Density of parcels developed under this section shall not exceed one dwelling unit per ten thousand square feet exclusive of driveways.

D.

Driveway access to each dwelling unit developed under this section shall have an unobstructed width of not less than twenty feet.

E.

Distance between dwellings developed pursuant to this section shall be not less than forty feet.

Lots developed pursuant to this section shall not be deemed to satisfy the condition set forth in former Section 11680(b)(2).

(Ord. 559 § 2, 1978: Ord. 551 § 12 (part), 1977: prior code 12303)

The regulations shown for RS districts in the schedule of zoning district regulations, Section 18.104.010, shall apply to each structure and to each use of land within the residential single district.

(Ord. 559 § 1, 1978; Ord. 551 § 12 (part), 1977: prior code 12304)