Rio Vista City Zoning Code
CHAPTER 17
08 R-1 RESIDENTIAL LOW DENSITY DISTRICT
§ 17.08.010 Purpose.
The regulations for this district are designed to stabilize and protect the residential characteristics of the district, to promote and encourage a suitable environment for family life where children are members of many families. The R-1 district is intended for urban single-family homes and the community services appurtenant thereto.
(Prior code Appendix B § 402(A); Ord. 001-2024, 2/20/2024)
§ 17.08.020 Uses permitted.
Uses permitted are as follows:
A.
Single-family and mobile homes, but not including tents or recreational vehicles;
B.
Accessory dwelling units;
C.
Home occupations (Section 17.44.040);
D.
Buildings and uses clearly accessory or incidental to any permitted use, including one noncommercial guest house on a minimum building site of 6,000 square feet, as provided in Section 17.44.090;
E.
Adult day care homes;
F.
Employee housing (agricultural) that complies with California Health and Safety Code Sections 17008, 17021.5, and the other applicable provisions of the Employee Housing Act of California Health and Safety Code Section 17000 et seq.;
G.
Family day care home;
H.
Residential care facility, small;
I.
Residential care facility, large;
J.
Supportive housing (Section 17.44.180);
K.
Transitional housing (Section 17.44.180).
(Prior code Appendix B § 402(B); Ord. 589 § 2, 2002; Ord. 593 § 1, 2003; Ord. 009-2015 § 2; Ord. 011-2018 § 3; Ord. 007-2020 § 4; Ord. 010-2021 § 3; Ord. 001-2024, 2/20/2024)
§ 17.08.030 Conditional uses.
Uses permitted, provided the conditions for a use permit as set forth in Section 17.66.070 are fulfilled:
A.
Automobile parking lot, when adjacent to any C or M district;
B.
Parks, playgrounds;
C.
Rooming and boarding of not more than two persons per dwelling unit except that signs advertising same are prohibited;
D.
Public and semi-public buildings, including, but not limited to, fire stations, schools, churches, libraries, hospitals, community and civic centers;
E.
Convalescent and other 24-hour care facilities;
F.
Nursery school, pre-school, and day care center.
(Prior code Appendix B § 402(C); Ord. 589 § 2, 2002; Ord. 001-2024, 2/20/2024)
§ 17.08.040 Minimum areas, yards, and other conditions.
Minimum building site areas required shall include any of the following. Upon the designation of an area to a particular minimum site area, such designation shall be used as a suffix to the R-1 designation.
Zone | Min. Bldg. Site Area (Sq. Ft.) | Average Site Width (Ft.) Interior | Average Site Width (Ft.) Corner | Min. Yards Total (Ft.) Front | Min. Yards Total (Ft.) Each Side Interior | Min. Yards Total (Ft.) Each Side Corner |
|---|---|---|---|---|---|---|
R-1 | 6,000 | 60 | 70 | 20 | 5 | 10 |
In determining the minimum lot area, all public utility transmission line easements are to be excluded for the purpose of computing land areas, even though such easements are included in the subdivision design.
A.
Minimum Footage.
1.
Corner Lots. Average width: 70 feet; minimum width at front property line: 50 feet, except that on a cul-de-sac street, or irregular lots, minimum width at the front property line shall be 35 feet on the bulb end, or irregular front of street.
2.
Interior Lots. Average width: 60 feet; minimum width at front property line: 50 feet, except that on a cul-de-sac street or irregular lots, minimum width at the front property line shall be 35 feet on the bulb end, or irregular front of street.
B.
Proportion.
1.
Average depth: 90 feet.
2.
Maximum ratio lot depth to lot width: 2½:1.
(Prior code Appendix B § 402(D); Ord. 001-2024, 2/20/2024; Ord. 018-2025, 7/15/2025)
§ 17.08.050 Minimum rear yard required.
On the rear one-half of the parcel or lot there shall be provided 20% of the total lot area in open land which shall have a minimum dimension of 20% of the average lot depth, provided that such dimension shall not be required to exceed 25 feet and in no case shall be less than 15 feet. No principal building or structure attached thereto shall be closer than 10 feet to a rear lot line. The midway point of any rear exit opening of the dwelling shall not be closer than 20% of the average lot depth away from the rear property line.
Exception: Not more than 17% of the required rear yard area may be occupied by an attached addition to an existing dwelling, but in no case shall such addition:
A.
Be closer than 10 feet to the rear lot line;
B.
Be closer to the side lot line than normal side yard requirements of this title;
C.
Be allowed as a part of original construction of the principal dwelling unless:
1.
It is to be an unenclosed patio cover,
2.
The would-be owner-occupant agrees in writing on forms prescribed by the planning commission, to the construction of such projection.
(Prior code Appendix B § 402(E); Ord. 001-2024, 2/20/2024)
§ 17.08.060 Maximum building height.
Maximum building height: 35 feet.
(Prior code Appendix B § 402(F); Ord. 001-2024, 2/20/2024)
§ 17.08.070 Parking.
A minimum of two covered off-street parking spaces shall be provided for each dwelling unit, except that no parking space shall be located in any required front or side yard.
(Prior code Appendix B § 402(G); Ord. 001-2024, 2/20/2024)
§ 17.08.080 Single-family dwellings-Special design review.
All single-family dwellings shall be reviewed by the zoning administrator or his or her designate to ensure compliance with Section 17.60.030.C and any special design standards as shall be adopted by the city council. If found to be consistent with the adopted design guidelines the zoning administrator shall approve such plans as a part of the zoning permit procedure (Section 17.66.050).
The city shall charge a fee to the owner(s) of the single-family dwellings for such review at a rate as established by resolution of the city council.
If the zoning administrator finds the proposed single-family dwelling not to be consistent with the requirements the zoning permit shall be disapproved. Such disapproval is appealable to the planning commission in accord with Sections 17.60.030.C and 17.66.080.
(Prior code Appendix B § 402(H); Ord. 001-2024, 2/20/2024; Ord. 018-2025, 7/15/2025)
§ 17.08.090 Site and architectural review.
Site and architectural review pursuant to Section 17.60.030 is required for all two-family or multifamily uses and structures.
(Prior code Appendix B § 402(I); Ord. 001-2024, 2/20/2024)
