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Renting an ADU

ADU Airbnb income: check the rules before the revenue

By the HyreADU research desk. Last checked .

The short answer

ADU Airbnb income depends first on whether short stays are legal for your unit.

California lets cities require ADU rentals of 30 days or longer, and ADUs approved by right under Gov. Code § 66323 must be rented for more than 30 days.

Where short stays are allowed, income is nights booked times the nightly rate, minus platform fees, cleaning, supplies, utilities and local taxes.

Taxes, insurance and neighbors

Short stays add duties a long lease does not. Many cities charge a transient occupancy tax on stays under 30 days, and some require a local contact who can answer complaints at any hour.

A homeowners policy may not cover paying guests, so ask your insurer what a short-term rental policy covers.

Neighbors notice turnover, cars and noise, which is why many cities cap the number of nights or require the owner to live on site.

Read your city’s short-term rental ordinance in full before you furnish the unit.

Is it allowed for your ADU?

  • Does your city require ADU rentals of 30 days or more (Gov. Code § 66315)?
  • Was your ADU approved under § 66323, which requires terms longer than 30 days?
  • Does your city require a short-term rental permit or a business license?
  • Does your HOA allow short-term rentals?
  • Is occupancy tax collected by the platform or by you?

How to estimate it

  • Nights booked per year: look at similar listings’ calendars for your area and season.
  • Average nightly rate: from comparable listings, not the top ones.
  • Subtract platform fees, cleaning and laundry, supplies, utilities, furnishings and repairs.
  • Subtract occupancy tax if you collect it, and permit fees.

How common it is

In the 2021 UC Berkeley survey of California ADU owners, 8 percent of units were used for short-term rental, against about half rented long term. Our short-term rental rules research covers city rules we have checked.

Medium-term stays as a middle path

Stays of 30 days or more, such as for traveling nurses or people between homes, can meet a 30-day minimum while keeping some flexibility. They usually need furnishing and a lease. Compare the options on long-term vs short-term rental.

A mistake to avoid

The mistake to avoid is building an ADU on a short-stay business plan before checking the rules for that ADU. A 30-day minimum can be a condition of the approval itself. Get the answer for your address in writing from the planning department first.

What to do next: check your lot with the ADU feasibility checker, read the questions to ask an ADU builder, then tell us about your project. Matching is not live yet, so we reply with information, not a quote.

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Questions

Can I Airbnb my ADU in California?

Only where your city allows it and no 30-day minimum applies to your unit.

Do I have to collect occupancy tax?

Many cities charge one. Some platforms collect it; check your city.

Is Airbnb income more than long-term rent?

We publish no comparison. Model both on your own numbers.

Can a JADU be a short-term rental?

California requires local JADU ordinances to limit rentals to terms longer than 30 days.

Sources

HyreADU is a publisher. It does not design, permit or build ADUs, has no partner builders, and gives no legal, tax, lending or engineering advice.

Rules vary by state and city; California rules are labeled as such. Spotted an error? Tell us through our corrections page. Licensed professionals can also contribute as named sources.