Chapter 18.12 — DISTRICT CLASSIFICATION (§ 18.12.010 – § 18.12.040)
Union City Zoning Code · 2026-06 edition · ingested 2026-07-07 · Union City
The following zoning districts are established:
| RS | 10,000 | Single-Family Residential District |
|---|---|---|
| RS | 8,000 | Single-Family Residential District |
| RS | 7,000 | Single-Family Residential District |
| RS | 6000 | Single-Family Residential District |
| RS | 4500 | Single-Family Residential District |
| R | 5000 | Decoto Residential District |
| RM | 3500 | Multifamily Residential District |
| --- | --- | --- |
| RM | 2500 | Multifamily Residential District |
| RM | 1500 | Multifamily Residential District |
| CSMU | Station Mixed Use Commercial District | |
| CMU | Corridor Mixed Use | |
| MMU | Marketplace Mixed Use | |
| SEMU-R | Station East Mixed Use Residential | |
| VMU | Village Mixed Use | |
| CPA | Professional and Administrative Commercial District | |
| CN | Neighborhood Commercial District | |
| CC | Community Commercial District | |
| CVR | Visitor and Recreation Commercial District | |
| CUL | Union Landing Commercial District | |
| SEE | Station East Employment | |
| MG | General Industrial District | |
| ML | Light Industrial District | |
| MS | Special Industrial District | |
| CF | Civic Facility District | |
| PI | Private Institutional District | |
| A | Agricultural District | |
| OS | Open Space District | |
| -H | Hillside Combining District | |
| FC | Floodplain Combining District | |
| LHP | Landmark and Historic Preservation Overlay Zone | |
| PUD | Planned Unit Development | |
| CCDCD | Civic Center Design Control District | |
| R511 | Single-Family Residential District, 511 Specifc Area Plan |
(Ord. 55-64 § 3.0, 1964; Ord. 55.38-68 § 2, 1968; Ord. 55.104-73 § 2, 1973; Ord. 55.107-73 § 2, 1973; Ord. 55.117-74 § 2, 1974; Ord. 55.142-75 § 2, 1975; Ord. 55.224-80 § 2, 1980; Ord. 55.239-81 § 2, 1981; Ord. 55.257-85 § 2, 1985; Ord. 55.259-85 § 2, 1985; Ord. 55.260-85 § 2, 1985; Ord. 55.261-85 § 2, 1985; Ord. 55.263-85 § 2, 1985; Ord. 55.266-86 § 2, 1986; Ord. 55.267-86 § 2, 1986; Ord. 55.268-86 § 2, 1986; Ord. 55.269-86 § 2, 1986; Ord. 55.270-86 § 2, 1986; Ord. 55.276-86 § 2, 1986; Ord. 55.277-86 § 2, 1986; Ord. 55.278-86 § 3, 1986; Ord. 55.279-86 § 3, 1986; Ord. 55.280-86 § 3, 1986; Ord. 55.282-87, 1987; Ord.
55.283-87 § 2, 1987; Ord. 55.287-87 § 2, 1987; Ord. 55.289-87 § 2, 1987; Ord. 55.292-88 § 2, 1988; Ord. 55.295-88 § 2, 1988; Ord. 55.299-88 § 2, 1988; Ord. 55.300-88 § 2, 1988; Ord. 55.301-88 § 2, 1988; Ord. 55.302-88 § 2, 1988; Ord. 55.303-88 § 2, 1988; Ord. 55.305-89 § 2, 1989; Ord. 55.307-89 § 2, 1989; Ord. 55.309-89 § 2, 1989; Ord. 340-90 § 2, 1990; amended during 1990 republication; Ord. 355-90 § 2, 1990; Ord. 357-90 § 3, 1990; Ord. 55.316-90 § 2, 1990; amended during 5/93 supplement; Ord. 523-98 § 2(A), 1998; Ord. 670-06 § 3, 2006; Ord. 903-22 § 4, 2022)
There is adopted the "official zoning map" of the City as on file in the office of the City Clerk. All property within the City is placed in such zoning districts as indicated on the map, and no property shall be used except in accordance with zoning designations on the map and the provisions of this title. The map shall be maintained in the City offices by the City Clerk and duly certified by him/her.
All amendments to the official zoning map shall be noted thereon with the date of the amendment and references to the amending ordinance.
The official zoning map is made a part of this title and may be amended by reference thereto and to this section.
(Ord. 55-64 § 3.1, 1964; Ord. 670-06 § 3, 2006)
Whenever any uncertainty exists as to the boundaries of any district shown upon the official zoning map or any part thereof or amendment thereto, the following provisions shall apply:
A.
Where boundaries are indicated as approximately following the centerline of streets or alleys or the lot lines, such lines shall be construed to be such boundaries;
B.
In the case of unsubdivided property or where a zone boundary divides a lot, the location of such boundaries, unless the same are indicated by dimensions or legal descriptions, shall be determined by use of the scale appearing on the official zoning map;
C.
Where further uncertainty exists, the Planning Commission upon written application or on its own motion, shall determine the location of the boundary in question, giving due consideration to the location indicated on the official zoning map and the objectives of the zoning title and the purposes set forth in the district regulations.
(Ord. 55-64 § 3.2, 1964; Ord. 670-06 § 3, 2006)
Where a public street or alley or any portion of the same is officially vacated or abandoned, the area comprising such vacated street or alley shall acquire the zoning district classification of the property to which it reverts.
(Ord. 55-64 § 3.3, 1964)