Local zoning · Union City

Union City — Variances and Exceptions

Q: What findings must the City make to approve a variance?

All findings in § 18.60.060 must be made: e.g., strict enforcement would cause practical difficulty or hardship; exceptional circumstances exist and aren’t applicant‑created; relief won’t grant a special privilege or harm public health/safety/welfare. Parking/loading variances require additional findings listed in subsection B of the same section (§ 18.60.060) .

Q: Can I get a variance to allow a different use than the zoning allows?

No — the variance power does not authorize a change in use regulations. Use changes require a conditional use permit or rezoning; variances are limited to dimensional/physical standards (setbacks, coverage, height, parking) .

Q: How long does an approved variance last in Union City?

A variance is typically valid for one year from the effective date; it becomes null and void unless a building permit is issued and construction is commenced (as defined in the code) or a certificate of occupancy is issued; limited renewals are possible through the Planning Commission (Chapter 18.60, one‑year term and renewal rules) .

Variances and Exceptions under the Union City local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Union City handles variances and site-specific exceptions through its zoning code in Chapter 18.60 — Variance Permits (§ 18.60.010 – § 18.60.110); variances are discretionary, narrowly-tailored relief from objective development standards (not from use prohibitions) and are decided with written findings and public notice. The City’s administrative structure (Director / Zoning Administrator / Planning Commission) and appeal rules in the administration chapters control who hears and reviews variance requests and revocations. § 18.60.010 – § 18.60.110 ; appeals reference § 18.52.088 .

Important context links used below: the Union City zoning overview and related procedural topics such as Union City Zoning, the City's Union City Development Standards, how parking requirements and exceptions are handled via Union City Parking, and discretionary design review via Union City Design Review. Variances interact frequently with overlay rules; see Union City Overlay Districts, ADU rules (see Union City ADUs), and the state code (see California Building Standards Code).

How variances and exceptions operate in Union City

Key procedural and substance rules (source: Chapter 18.60 and related administration chapters):

Who decides: Variance permits are processed under Chapter 18.60; the Planning Commission may approve, conditionally approve, or disapprove variance permit applications, with appeals governed by § 18.52.088 (appeals) and notice per § 18.52.082 (public hearing notice) .
Application contents: The code requires an application to the Planning Commission with a precise statement of the variance request and the practical difficulty/hardship, scaled site drawings (300-foot radius), utilities/parking/landscaping shown, and a 300-foot mailing list; an application fee is required (amount set by City Council resolution) — these submittal items are described in the variance chapter and cross-referenced administrative provisions .
Required findings to grant any variance: All six findings listed in the code must be made — e.g., that strict enforcement would result in practical difficulty/hardship; there are exceptional circumstances not caused by the applicant; the variance would not constitute a special privilege; and it would not be detrimental to public health, safety or welfare — see § 18.60.060 for the full findings list .
Additional findings for parking/loading variances: For variances to off‑street parking or loading standards the code requires extra findings about traffic generation, on‑street parking impacts, and safety — see § 18.60.060(B) .
Scope limits: The variance power explicitly does not extend to altering use regulations (i.e., you cannot use a variance to allow a prohibited use; conditional or use permits are the mechanism for that) .
Conditions, time limits and revocation: A variance may be revoked, time-limited, made revocable, or conditioned as needed to support the findings; variances typically become null if not acted on (e.g., building permit/commencement) within one year; renewals are possible for an additional year on application to the Commission; revocation procedures require a public hearing and City Council appeals follow § 18.52.088(C) .
Floodplain and special-case variances: Floodplain-related variances have added notification and recordation rules (applicants must receive written notice that building below regulatory flood elevation increases flood insurance costs; the notice is to be recorded) — see the floodplain chapter and related variance language .
Administrative exceptions/reductions: Many chapters authorize the decision maker to grant targeted exceptions or reductions (e.g., sign height, parking frontage visibility, soil depths for roof planting) upon discrete findings; those exception provisions are located throughout the code in the chapter that contains the objective standard (examples: signage Chapter 18.30, parking reductions in objective design standards tables) .

District-by-district breakdown (how variances commonly appear by district)

Below are selected Union City zoning districts where variance issues are frequently raised. For each district: purpose, typical permitted uses, key dimensional standards, and where the district applies (code references shown).

Note: Union City formally lists district classifications in Chapter 18.12 — District Classification (§ 18.12.010 – § 18.12.040); the code sets out district‑specific rules in the chapter for each district (residential in Chapter 18.32, commercial in Chapter 18.36, etc.) .

RS / R / RM (Residential districts — e.g., RS 6000, R (Decoto / R-5000), RM-1500)

Purpose: Provide single‑family and multi‑family housing with district‑specific density/lot standards; the residential chapters define permitted uses (single-family, accessory structures, multifamily in RM, etc.) and development standards. See Chapter 18.32 (Residential Districts) for permitted residential uses and bulk rules .
Typical permitted uses: one‑family dwellings in RS/R; multifamily and attached units in RM districts; accessory dwelling units follow special rules and exceptions (ADU rules appear in Chapter 18.34) .
Key dimensional standards (examples used often in variance requests): minimum lot area per unit varies by RM district (e.g., RM-1500: ~1,450 sq ft per unit), maximum lot coverage ranges (e.g., RM-1500 up to 80%), setbacks and maximum height shown in Chapter 18.32 tables; specific small‑lot or DIPSA variations are in respective chapters .
Where it applies: citywide residential neighborhoods; SB-9 and ADU provisions cross‑apply and can affect variance calculations — verify Chapter 18.31 (SB 9) and Chapter 18.34 (ADUs) for interactions .

CC — Community Commercial (Chapter 18.36)

Purpose: medium‑scale community retail and services, mixed‑use potential along corridors .
Typical uses: retail, restaurants (with use‑permit limits for live music), offices, civic facilities; residential above ground floor where mixed‑use rules apply .
Key standards: commercial parking and loading standards (see § 18.36.150 for off‑street parking), signage rules (Chapter 18.30), and bulk/setback rules in Chapter 18.36; design review and site development review frequently apply for commercial variances .

CSMU — Station Mixed Use Commercial

Purpose: high‑intensity, transit‑oriented mixed use around stations (listed in Chapter 18.12 and implemented in district chapters) .
Notes: Parking requirements and reductions near transit are significant; Government Code exemptions (e.g., parking waivers near transit) may apply and are cited in the code; those trigger parking-variance or exception requests that must meet § 18.60 findings and proximity/transit policy tests .

SEMU‑R — Station East Mixed Use Residential (Chapter 18.37)

Purpose: transit‑area residential/mixed‑use development emphasizing paseos, pedestrian orientation, and façade/parking rules. Variance requests commonly target paseo setbacks, parking frontage visibility, and roof‑deck planting depths (exceptions exist for reduced soil depths if findings are made) .

CMUE / SEE — Corridor Mixed‑Use Employment & Station East Employment (Chapter 18.41)

Purpose: employment, R&D, office, and mixed‑use employment nodes. Table 18.41.060 lists decision‑relevant development standards (site area, FAR, setbacks, heights) that are often the subject of variances (e.g., interior side yard or height exceptions) .
Decision checklist items for exceptions (e.g., exception to above‑ground parking visibility limits) appear in the district tables and require the findings in Chapter 18.60 .

511 Area District (Chapter 18.100 — 511 Area)

Purpose: implement the 511 Area Specific Plan; adopts development categories from the Specific Plan and cross‑references other district standards (CF, 18.36 commercial standards, etc.) — variance procedure references Chapters 18.56, 18.60, 18.72, 18.76 for processing .

Quick reference table — selected decision‑relevant standards and code references

District	Typical permitted uses (decision focus)	Key decision-relevant standards	Code Reference
RS / R / RM (e.g., RM‑1500)	Single‑family (RS/R), multifamily (RM) — density, ADUs	Site area per unit (e.g., RM‑1500 ≈ 1,450 sf/unit); lot coverage up to 80% (RM); minimum widths/depths	Chapter 18.32 tables; see development standards tables § 18.32.x
CC (Community Commercial)	Retail, restaurants, offices, ground‑floor commercial with residences above	Off‑street parking standards, sign area/height, setbacks	§ 18.36.010 – § 18.36.210
CSMU (Station Mixed Use)	Transit‑oriented mixed‑use	Parking waivers/exceptions near transit; design & frontage limits	Chapter list 18.12 and district chapters; parking rules cross-referenced in § 18.28 and § 18.36
CMUE / SEE	Office, R&D, limited ground-floor retail	FAR ranges (e.g., .40–2.0 for CMUE, .75–3.0 for SEE); max height 60–100 ft; interior yards when adjacent to residential larger	Table 18.41.060 (development standards)
511 Area (R511)	Specific plan mixed uses per 511 Specific Plan	Applies specific plan standards; follows Ch. 18.36 or 18.50 depending on land use	§ 18.100.010 – § 18.100.090

(For exact line‑by‑line numeric values consult the district chapter tables in Chapters 18.32, 18.36, 18.41, and 18.100; tables are reproduced in the code) .

Checklist — what applicants must satisfy for a variance in Union City

File a complete application to the Director/Planning Commission per Chapter 18.60, including a precise statement of the requested variance and the practical hardship/practical difficulty (Chapter 18.60)
Provide accurate scaled site plans showing the site and 300‑ft surrounding area, utilities, parking, and landscaping; include a 300‑ft owner/occupant mailing list and pay required fee (amount set by Council resolution) (Chapter 18.60 submittal requirements)
Demonstrate each required finding from § 18.60.060: hardship/practical difficulty; exceptional circumstances not caused by applicant; deprivation of privileges enjoyed by others; no special privilege; no material detriment to health/safety/welfare (§ 18.60.060)
If the variance is to parking/loading standards, also satisfy the additional parking/load findings in § 18.60.060(B) (traffic generation, no on‑street parking interference, no safety hazard)
Confirm whether the request is a variance (relief to an objective dimensional/physical standard) or whether the correct vehicle is a use permit, administrative site development review, or design exception — variances do not permit prohibited uses (Chapter 18.60; Chapter 18.56)
For floodplain or FC (Floodplain Combining) issues: include flood analyses and accept required written notice and recordation if relief is granted (flood chapter requirements)

Risks & Ambiguities

Issue	Why it matters	What to verify
Variance cannot change use rules	Variances cannot be used to allow a use expressly prohibited in the district — those issues require a use permit	Verify whether the project is a bulk/dimensional issue (variance) or a use issue (use permit) § 18.60.x
Administrative exceptions vs Planning Commission variances	Some chapters allow Director/decision‑maker to grant limited exceptions (e.g., signs, minor parking reductions) — these follow different processes	Check the specific chapter (e.g., 18.30 signs, district tables) for whether an exception route exists and which findings apply
Floodplain variance costs and recording	Floodplain variances require notice to applicant and recordation that can affect title and insurance costs	Confirm flood chapter requirements and recorded notice obligations; verify with the Floodplain Board / Building Official
Transit‑proximate parking waivers	State and local parking waivers/adjustments near transit may change the need for a variance	Confirm proximity and applicable Government Code waivers and local parking sections (see § 18.28 / § 18.36.150)
Renewal / lapse timing	Variances lapse (commonly 1 year) if construction/permit action does not commence, so timing is critical	Verify the variance term, renewal rules, and definition of “construction commenced” in the code (variance term and commencement definition)

Plain-English Summary

A variance in Union City is a narrowly focused exception to a numeric or physical zoning rule (setbacks, heights, parking, coverage), not a way to change what uses are permitted; to win one you must prove exceptional, non‑self‑created circumstances and meet the findings in § 18.60.060, follow the application checklist in Chapter 18.60, and expect public notice, possible hearings, and a one‑year expiration unless renewed .

Source References

Chapter 18.60 — VARIANCE PERMITS (§ 18.60.010 – § 18.60.110) — variance findings, procedures, time limits, revocation; see variance application and findings language § 18.60.050, § 18.60.060 .
Administration and appeals: § 18.52.082 (notice), § 18.52.088 (appeals) (administration of hearings and appeals) .
Application submittal items for variances (drawings, mailing lists, fees) and Director/Planning Commission processing details — variance submittal requirements and Director duties (Ch. 18.52 / Ch. 18.60) .
Floodplain variances and notice/recordation requirements — flood chapter and flood variance rules (flood chapter definitions and variance recordation language) .
District classification and district lists (Chapter 18.12 — § 18.12.010 – § 18.12.040) — listing of RS, R, RM, CSMU, CMUE, SEE, 511 Area (R511), overlays such as LHP and HE .
Residential district standards and tables (RM densities, lot coverage, setbacks) — Chapter 18.32 (residential standards tables) .
Commercial districts and off‑street parking references (Chapter 18.36) — parking, sign and use provisions invoked during variance review; see § 18.36.010 – § 18.36.210 .
CMUE / SEE development standards (Table 18.41.060) — FAR, setbacks, heights that commonly trigger variance requests .
511 Area Specific Plan district (Chapter 18.100.010 – § 18.100.090) and cross-references to Chapters 18.36, 18.50 for specific standards .
Sign regulations and sign‑variance provision — Chapter 18.30 (variance procedure for signs) .
Union City zoning & chapter index (Title 18 Zoning) — Title overview and chapters list (Title 18) .
California Building Standards Code (state building code) — referenced where building/permit time limits and flood code variance interactions matter California Building Standards Code (see local flood variance cross‑references) .

Sources

Retrieved passages

Union City Zoning Code (title with) High relevance
CBC § 11.6 (§ 11.6) High relevance
Union City Zoning Code High relevance
Union City Zoning Code (§ 11.6) High relevance
Union City Zoning Code (title is) High relevance
Union City Zoning Code (chapter as) Medium relevance
Union City Zoning Code (chapter which) Medium relevance
Union City Zoning Code (§ 9.4) Medium relevance
CBC § 11.6 (§ 11.6) Medium relevance
CBC § G107 (SECTION G107) Medium relevance
Union City Zoning Code (chapter can) Medium relevance
CBC § G106 (SECTION G106) Medium relevance
Union City Zoning Code (chapter which) Medium relevance
Union City Zoning Code (§ 4) Medium relevance
Union City Zoning Code (§ 5.6) Medium relevance
Union City Zoning Code (chapter for) Medium relevance
Union City Zoning Code (Chapter 18.76.) Medium relevance
Union City Zoning Code (Chapter 9.40) Medium relevance
CFC § 6.0 (§ 6.0) Medium relevance
Union City Zoning Code (Chapter 18.72) Medium relevance
Union City Zoning Code (§ 2) Medium relevance
Union City Zoning Code (§ 4.3) Medium relevance
CFC § 4 (Section 18.32.040) Medium relevance

Cited sections

Official Union City code library

Frequently asked questions

What is the first step to apply for a variance in Union City?

Start by preparing the variance application required by Chapter 18.60: include a written statement of the specific regulation you seek relief from, the practical hardship or difficulty, scaled site drawings (300‑ft area), the 300‑ft mailing list, and the application fee; file with the Director who forwards materials to the Planning Commission and schedules the public hearing (Chapter 18.60; § 18.60.050) .

What findings must the City make to approve a variance?

All findings in § 18.60.060 must be made: e.g., strict enforcement would cause practical difficulty or hardship; exceptional circumstances exist and aren’t applicant‑created; relief won’t grant a special privilege or harm public health/safety/welfare. Parking/loading variances require additional findings listed in subsection B of the same section (§ 18.60.060) .

Can I get a variance to allow a different use than the zoning allows?

No — the variance power does not authorize a change in use regulations. Use changes require a conditional use permit or rezoning; variances are limited to dimensional/physical standards (setbacks, coverage, height, parking) .

How long does an approved variance last in Union City?

A variance is typically valid for one year from the effective date; it becomes null and void unless a building permit is issued and construction is commenced (as defined in the code) or a certificate of occupancy is issued; limited renewals are possible through the Planning Commission (Chapter 18.60, one‑year term and renewal rules) .

Are there special rules for parking variances?

Yes — in addition to the general variance findings, a parking or loading variance must satisfy extra findings about present/future traffic volumes, on‑street parking impacts, and safety (see § 18.60.060(B)). Parking near transit can also trigger different waivers under parking sections and state law; always cross‑check § 18.28 / § 18.36.150 for parking rules .

Do floodplain variances have extra notices or recorded documents?

Yes — floodplain variances carry special notice obligations; the code requires the applicant to receive written notice that construction below the regulatory flood elevation changes flood insurance costs and that this notice must be recorded to appear in the chain of title; see the flood chapter for the exact requirements and recordation process .

Can the Director handle minor exceptions or must everything go to the Planning Commission?

Some chapters authorize the Director (or another single decision maker) to grant limited exceptions or administrative approvals (e.g., minor sign plan approvals, some administrative site development reviews). Where the chapter allows an administrative exception, the applicable chapter describes the process; otherwise variances follow Chapter 18.60 and public hearing procedures .

If a variance is denied, can I reapply immediately?

No — after a denial or revocation, the code bars filing an application for the same or substantially the same variance on the same or substantially the same site for one year from the date of denial/revocation; check Chapter 18.60 for the revocation and refiling rule .

Where do I check the numeric setback or height standard that I need relief from?

Consult the specific district chapter for the parcel’s zone (e.g., Chapter 18.32 for residential tables, Chapter 18.36 for commercial, or the district tables such as Table 18.41.060 for CMUE/SEE); variance requests must reference the particular numeric standard in the applicable district chapter .

Do ADUs need a variance if they encroach on setbacks?

Accessory dwelling units (ADUs) have their own rules in the ADU chapter and state ADU law often preempts local rules; the ADU chapter and Chapter 18.32/18.34 specify applicability — sometimes ADU provisions remove the need for a variance; verify ADU code provisions before pursuing a variance (Chapter 18.34 and state ADU law) . ---

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