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Riverside County, CA Accessory Structures: ADU Rental Restrictions (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Minimum rental term
31 days
Covers
ADU, junior ADU, second unit, ranchet
Guest quarters
Never rented, household use only
MOG units
Never rented or leased
Applies in
Unincorporated county only

Summary

Riverside County bars renting an accessory dwelling unit, junior ADU, second unit, or ranchet for 30 days or less, so any lease on these additional residential accommodations must run at least 31 days in the unincorporated county.

City-specific rules exist: Corona, Riverside, Murrieta, Palm Springs, Moreno Valley, and Temecula have their own adu rental restrictions rules that differ from Riverside County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

5.Except for guest quarters and MOG units, additional residential accommodations may be rented to and occupied by any person(s) in accordance with occupancy requirements provided in this chapter... 6.Additional residential accommodations shall not be rented for a period less than or equal to thirty (30) days.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 84 Update 1).

Full Breakdown

Under the county's additional-residential-accommodation chapter, an ADU, junior ADU, second unit, or ranchet may be rented out, but never for a stay of 30 days or less: effectively banning short-term rental use of these units. Guest quarters and MOG units are treated differently: guest quarters may only be used by the primary household or their non-paying guests, and MOG units can never be rented or leased at all. The rule applies only to unincorporated Riverside County; incorporated cities like Riverside, Temecula, and Palm Springs set their own ADU rules.

Violations & Fines

Renting an ADU, junior ADU, second unit, or ranchet for 30 days or less violates the occupancy standards in Chapter 17.294 and is enforceable as a zoning code violation by county code enforcement, separate from any short-term-rental permitting rules.

Frequently Asked Questions

Can I rent my Riverside County ADU nightly on Airbnb?
No. County code bars renting an ADU for a period of 30 days or less, so nightly or weekly stays are prohibited on unincorporated land.
Does the 30-day rule apply to a detached guest quarter?
Guest quarters can't be rented at all: they're limited to use by the main household or their non-paying guests, per Chapter 17.294.

Sources & Official References

Other rules in Riverside County

Noise Ordinances: Construction HoursSome RestrictionsADU RulesSome RestrictionsShed & Carport RulesSome RestrictionsADU Impact FeesSome RestrictionsADU Owner OccupancySome RestrictionsTiny HomesSome RestrictionsNoise Ordinances: Barking DogsSignificant RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: EV ChargingSome RestrictionsAnimal Ordinances: Veterinary Clinic ZoningSome RestrictionsLandscaping Rules: Native PlantsSome Restrictions

All Riverside County rules

California rules heatmap·Compare Riverside County to another location·View the California accessory structures overview

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ADU Rental Restrictions in Cities Across Riverside County

Riverside, CAMoreno Valley, CACorona, CATemecula, CAMurrieta, CAPalm Springs, CAJurupa Valley, CAMenifee, CA