Union City, CA Rental Property Rules: Rent Increase Notice (2026)
Key Facts
- State notice
- 30 days, increases ≤10%
- State notice
- 60 days, increases over 10%
- Local addition
- Rent-review notice, same time
- Languages
- Three most common in City
- If skipped
- Increase is void
Summary
State law sets 30- or 60-day rent-increase notice periods, and Union City's Chapter 5.55 requires landlords to also notify tenants of the City's rent review procedure at the same time.
NOTICE: Under Civil Code Section 827(b) a landlord must provide a tenant with 30 days' notice prior to a rent increase of 10% or less and 60 days' notice of a rent increase of greater than 10%. Under Chapter 5.55 of the Union City Municipal Code, a landlord must, at the same time as a notice of a rent increase, provide this notice of the City's rent review procedure, before demanding or accepting any increase in rent.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4940544; v16 updated 2026-06-23).
Full Breakdown
Civil Code § 827(b) requires 30 days' notice for a rent increase of 10% or less and 60 days' notice for a larger increase: that state rule controls the timing. Union City's Chapter 5.55 layers an additional local requirement: at the same time a landlord gives that notice, the landlord must also deliver written notice of the City's rent review procedure, in the three languages most common in the City, under § 5.55.030. A rent increase served without the rent-review notice is void and unenforceable.
Violations & Fines
Raising rent without also serving the required rent-review notice voids the increase; the landlord cannot enforce it, and any illegal increase already collected must be refunded to the tenant.
Frequently Asked Questions
How much notice must a Union City landlord give before raising rent?
What if the landlord skips the rent-review notice?
Sources & Official References
Other rules in Union City
California rules heatmap·Compare Union City to another location·View the California rental property rules overview
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Rent Increase Notice in Nearby Cities
How other cities in Alameda County handle rent increase notice.