Union City · Property taxes
Property taxes in Union City
Property tax in Union City: the range of tax rates from the county's table, the levies behind it, the Mello-Roos districts the city formed and the state rules, with a link to every source.
Key points
Union City property tax: total rates 1.1714% to 1.3093% across 94 tax rate areas (FY 2026-27), the levies behind it and the Prop 13 rules, with the county source. The county sets and collects the tax.
Each block below is marked county or state data, Union City code or CA state law, and links to its source (checked October 2026). General information, not legal advice.
Tax rates in this area
County rate table The county lists 94 tax rate areas inside Union City for fiscal year 2026-27. Their total rate runs from 1.1714% to 1.3093% of assessed value.
The total is the 1% general tax (Proposition 13) plus the rates voters approved for school, city and other bonds. It does not include fixed charges such as Mello-Roos special taxes, parcel taxes or assessments, which come on the same bill.
| Levy | Rate | Share of rate areas |
|---|---|---|
| General tax (Prop 13) | 1% | all |
| NEW HAVEN SCH BONDS | 0.172% | 95% |
| CHABOT-LAS POSITAS COLL BONDS | 0.0391% | 74% |
| WASHINGTON TWP HOSP | 0.0212% | 96% |
| BAY AREA RAPID TRANSIT | 0.0163% | all |
| COUNTY GO BOND | 0.0083% | all |
| ALAMEDA CO WATER | 0.0054% | 91% |
| EAST BAY REGIONAL PARK 1 | 0.0018% | all |
Your exact rate depends on your address. Look up the rate for an address → Source: Alameda County rate table, fiscal year 2026-27.
Mello-Roos districts
State data Union City has formed 1 Mello-Roos community facilities district. A home inside one pays a special tax on its property tax bill, in addition to the rate above.
- Union City CFD No 97-1 (bonds run to 2028)
The state data gives no tax amounts. Your tax bill shows them; the address lookup lists the districts named for the city. School, water and other districts may have formed districts here too. Source: California State Treasurer, DebtWatch (reporting year 2025).
The state rules underneath
CA state law California law sets this statewide. 1% property tax limit (Prop 13): The general property tax on real property may not exceed 1% of its full cash value; voter-approved bond debt is levied on top (Cal. Const. art. XIII A, § 1(a), (b)). 2% annual cap on assessed value: The base year value rises each year by the California CPI change, but never more than 2% (Rev. & Tax. Code § 51(a)(1)(D)). California property tax rules — the full state rule →
Utility users tax
| Tax on electricity |
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|---|---|
| Tax on gas |
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| Tax on water, phone or cable |
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Who this affects
Frequently asked questions
What is the property tax rate in Union City?
The county lists 94 tax rate areas inside Union City for fiscal year 2026-27. Their total rate runs from 1.1714% to 1.3093% of assessed value. The exact rate depends on the address.
Does Union City have Mello-Roos districts?
Yes. Union City has formed 1 Mello-Roos community facilities district (State Treasurer data). Only homes inside a district pay its special tax.
Does Union City charge a utility users tax?
Union City's code: 5% of electricity charges. (§ 3.28.060); 5% of gas charges. (§ 3.28.070).
General information, not legal advice.
Ask about a specific Union City property
Ask GoCodebook how these rules apply to your address and get an answer that cites the section.
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