Union City — Parking

Last reviewed: July 2, 2026

Overview

This page explains how Union City's Title 18 zoning ordinance controls off‑street parking, loading, and bicycle parking for specific local zoning districts and special areas. It synthesizes the numeric requirements, design/location limits, and substitution/waiver paths found in the code, with the controlling section numbers and source citations so you can verify requirements for a particular parcel. For site layout and façade/landscape interactions consult the city's development standards and submit materials through the design review process where required; parking also interacts with local overlay districts and ADU rules — see the ADUs page. Links below are first occurrences only.

Notes up front:

• The off‑street parking and loading rules apply to all new buildings and increases in intensity of use; grandfathering and limited exceptions are addressed in § 18.28.010.
• Bicycle parking is treated separately as short‑term and long‑term with minimums and design criteria in § 18.28.080.
• Loading berth dimensions and placement are controlled by § 18.36.140.

How the code applies (key chapters & cross‑references)

• Off‑street parking and loading: Chapter 18.28 (§ 18.28.010 – § 18.28.100) — applicability, fractional rules, off‑site parking covenants, bicycle parking types and design pointers.
• Commercial district parking/tabled rates: § 18.36.150 (commercial parking ratios and mixed‑use/shared parking guidance).
• Loading berths: § 18.36.140 (design/placement/berth dimensions).
• Parking and façade/location/design standards: § 18.24.050 (limits on above‑ground parking visibility, structured parking location, pedestrian access and screening).
• Industrial / employment parking tables: Table 18.40.070 and related rules in Chapter 18.40.
• Bicycle parking tables and substitution rules: Table 18.40.080 and related provisions (see also § 18.28.080 and § 18.28.090 for substitution).
• District‑specific bicycle minima and RM district bicycle rules: § 18.32.160 and related RM provisions.

District‑by‑district breakdown

Below are the districts that include explicit parking and bicycle standards in Title 18. Each subsection gives the district purpose, typical uses (short), and the code’s decision‑relevant parking rules and dimensional/design constraints.

Residential — RS (Single‑Family)

• Purpose / typical uses: Single‑family detached dwellings; preserve neighborhood character.
• Key parking rules: Two covered/enclosed parking spaces per dwelling unit as a minimum; a third covered space is required when the primary residence exceeds 3,000 sq ft or has five or more sleeping rooms; tandem spaces allowed in neighborhoods where two‑car garages predominate. § 18.32 rules apply (see table text).
• Design/location constraints: Garage doors on street‑facing elevations must be recessed and individual garage design standards apply (see § 18.24.050 for above‑ground parking frontage limits).

Residential — RM, including RM 1500 and RM 2500 (Multifamily)

• Purpose / typical uses: Multi‑unit housing at different densities.
• Key parking rules: RM standard: 1 space per studio/one‑bedroom (covered where required), 2 spaces per 2+‑bedroom unit; plus 0.25 guest space per unit. RM1500 references § 18.32.160 for detailed ratios; special affordable housing reduced ratios apply (100% affordable rental rules reference § 18.32.160(B)(5)).
• Bicycle parking: In RM 1500/RM 2500 a minimum of 1 bicycle facility per 3 units (see § 18.32.160(J)). Bicycle facilities must meet the design criteria in § 18.28.080.
• Design/location constraints: Structured/above‑ground parking visible from the public right‑of‑way is limited (max 40% frontage visibility on lots ≥ 50 ft) and structured parking must be 40 ft from the primary street facing lot line unless exceptions are found. § 18.24.050.

Commercial districts — (example: CPA, CMU, CSMU, CUL Union Landing Commercial)

• Purpose / typical uses: Professional offices, retail, mixed‑use retail/ground floor commercial. Specific districts (CPA, CMU, CSMU, CUL) have local goals such as pedestrian orientation and mixed‑use.
• Key parking rules: Commercial automobile parking rates are established in § 18.36.150 and related district tables; typical ratios include 1 space/250–300 sq ft for office and ~1 space/300 sq ft for retail (see the table in § 18.36.150 / Table 18.40.070). For ground‑floor retail within mixed‑use developments, shared parking reductions are allowed and in some mixed‑use cases ground‑floor retail may not require additional parking.
• Bicycle parking: Short‑ and long‑term bicycle minimums are required (retail: 1 short per 3,000 sq ft; 1 long per 10,000 sq ft; office: different minima) and must conform to § 18.28.080 and the district bicycle tables. Bicycle parking substitution for automobile spaces is allowed with approval (§ 18.28.090 / § 18.28.100 references).
• Loading: Loading docks/berths required and must be located side/rear and screened; minimum loading berth size 10 ft × 25 ft (see § 18.36.140 / loading rules).
• Design/location constraints: The code requires screening of parking structures and attention to auto entries to minimize pedestrian conflicts; structured parking facades must meet design standards (see § 18.24.050).

Industrial / Employment / SEE / CMUE districts

• Purpose / typical uses: Industrial, warehouse, R&D, and job‑center uses. The SEE and CMUE variants focus on employment uses with district‑specific bicycle tables.
• Key parking rules: Industrial uses often have lower automobile parking ratios (examples: manufacturing 1/1,000 sq ft plus truck/trailer parking rules; office 1/300–1/400 sq ft depending on subcategory). Truck trailer parking sizing and counts are spelled out in Table 18.40.070 and may be adjusted by the decision maker.
• Bicycle parking: Specific SEE / CMUE bicycle tables apply (see 18.41.090 tables) and must follow § 18.28.080 design criteria; substitution of bike spaces for auto spaces may be permitted with decision‑maker approval.

Institutional / PI (Private Institutional)

• Purpose / typical uses: Churches, private schools, nonprofit facilities. Parking and loading follow the general Title 18 off‑street parking chapters, with use‑specific minima often determined by the Planning Commission for large public‑serving uses. Chapter 18.51 references Title 18 off‑street rules.

Quick reference table — Most decision‑relevant parking minimums

(Always verify the district table that applies — some districts (BART property, CSMU, SEE, CMUE) have adjusted ratios or waivers.)

Design, location, and substitution rules you must watch

• Bicycle parking is split into short‑term (visible, near main entrances, anchorable racks) and long‑term (secure storage for residents/employees) with minimum counts and design rules in § 18.28.080.
• The City allows substitution of bicycle parking for automobile spaces and other off‑sets, but only with decision‑maker approval and under the substitution rules in § 18.28.090 / § 18.28.100.
• Parking visible from primary frontages is limited: in residential and other districts above‑ground parking visible from the public right‑of‑way generally must not exceed 40% of frontage (see § 18.24.050 for exceptions and findings).
• Off‑site parking is allowed only if legally bound (same possession by deed or long‑term lease) and recorded covenants must guarantee maintenance for the life of the use. § 18.28.010 and related subsections govern this.

Checklist

• Determine the subject property’s zoning district (RS, RM, RM1500/RM2500, CPA, CMU, SEE, CMUE, CUL, PI, etc.). Verify district map with the City. (Verify with jurisdiction.)
• Pull the applicable table for that district: § 18.32.160 (residential), § 18.36.150 (commercial), Table 18.40.070/18.40.080 (industrial/bicycle).
• Count required automobile, guest, motorcycle, and truck/trailer spaces per the applicable table; round fractions as required by § 18.28.010 rules (fractions < 0.5 disregard; ≥ 0.5 round up).
• Provide short‑ and long‑term bicycle parking to the district’s minimums and follow § 18.28.080 design criteria.
• Show parking layout, dimensions (9×18 uncovered; 10×20 covered; garage interior dims), maneuvering aisles, and pedestrian connections on the plot plan per § 18.28 and § 18.24.050.
• If using off‑site parking, prepare recorded covenants/lease demonstrating same possession and maintenance obligations (per § 18.28.010(E)).
• If seeking reductions (shared parking, bike‑for‑car substitution, waiver near transit), identify the decision‑maker path (administrative/site review or use permit) and cite the relevant substitution/waiver section (§ 18.28.090–100, and Government Code § 65863.2 references acknowledged in code).

Risks & Ambiguities

Plain‑English Summary

Union City's zoning chapters require on‑site parking, loading, and bicycle parking in amounts that depend on your zoning district: single‑family homes need two covered spaces, typical apartments need 1–2 spaces per unit depending on bedroom count, retail and office use have square‑foot ratios, and bike parking minimums exist for every district; loading berths and parking‑location/design (screening, frontage limits, pedestrian access) are also regulated. Key rules live in § 18.28.010 (off‑street parking applicability), § 18.36.150 (commercial), § 18.32.160 (residential/RM), § 18.24.050 (parking design/location), and the bicycle and loading subsections — always check the table that matches your district and get decision‑maker approval for substitutions or off‑site arrangements.

Source References

• City of Union City Zoning Code — Title 18: Chapter 18.28 (Off‑Street Parking and Loading) § 18.28.010 – § 18.28.100.
• City of Union City Zoning Code — Chapter 18.36 (Commercial Districts) — § 18.36.140 (Loading); § 18.36.150 (Off‑street parking).
• City of Union City Zoning Code — Chapter 18.32 (Residential Districts) — parking and RM1500/RM2500 specifics § 18.32.160.
• City of Union City Zoning Code — Chapter 18.24 (Bulk and Design Standards) — parking location & frontage limits § 18.24.050.
• City of Union City Zoning Code — Chapter 18.40 / Tables 18.40.070 & 18.40.080 (Industrial parking & bicycle tables).
• Union City Zoning Code (Title 18) — source metadata (ecode360).

Retrieved passages

• Union City Zoning Code (Chapter 18.28) High relevance show source text
• Union City Zoning Code (Chapter 18.30.) High relevance show source text
• Union City Zoning Code (§ 4) High relevance show source text
• Union City Zoning Code (§ 5.7) High relevance show source text
• Union City Zoning Code (§ 5.7) High relevance show source text
• Union City Zoning Code (Chapter 18.04.) High relevance show source text
• Union City Zoning Code (Chapter 7.04) High relevance show source text
• Union City Zoning Code (§ 2) High relevance show source text

Cited sections

• City of Union City Zoning Code — Title 18: Chapter 18.28 (Off‑Street Parking and Loading) **§ 18.28.010 – § 18.28.100**. (Title 18)
• City of Union City Zoning Code — Chapter 18.36 (Commercial Districts) — **§ 18.36.140 (Loading); § 18.36.150 (Off‑street parking)**. fileciteturn0file8turn0file1 (Chapter 18.36)
• City of Union City Zoning Code — Chapter 18.32 (Residential Districts) — parking and RM1500/RM2500 specifics **§ 18.32.160**. (Chapter 18.32)
• City of Union City Zoning Code — Chapter 18.24 (Bulk and Design Standards) — parking location & frontage limits **§ 18.24.050**. (Chapter 18.24)
• City of Union City Zoning Code — Chapter 18.40 / Tables 18.40.070 & 18.40.080 (Industrial parking & bicycle tables). fileciteturn0file9turn0file10 (Chapter 18.40)
• Union City Zoning Code (Title 18) — source metadata (ecode360). (Title 18)
• UnionCity_ZoningCode.md

• Official Union City code library