Renting a room in your California home: is your homeowners policy enough?

Usually, because you still live there. Many insurers start from wording drafted by the Insurance Services Office (ISO), a group that writes model policy forms. ISO's 2011 homeowners form covers "the one-family dwelling where you reside."

Renting a bedroom does not change where you live. What changes is how the form treats the room, the person in it, and their things.

Check your own policy's wording, since insurers adapt these forms. If you rent out a whole unit of a two- to four-unit home you live in, see how the form treats a duplex you live in.

Four parts of the 2011 model form treat a rented room differently from the rest of your home:

• The roomer's belongings: not covered, unless the roomer is your relative.
• Theft from the rented room: not covered, even of your own things kept there.
• Lost rent: paid at the room's fair rental value if a covered loss leaves the room unlivable, less costs that stop.
• Medical payments: not paid for someone who lives on the property, so a roomer is left out.

Two, before the model form's liability coverage is at risk. Its liability section leaves out injuries tied to a business. Renting counts as one once it brings in more than $2,000 during the year before the policy period.

Renting part of your home as a residence is an exception, unless one household lodges "more than two roomers or boarders." In 2016, state insurance regulators listed that two-roomer line among the typical exceptions in homeowners policies.

California law has its own word for a roomer in an owner's home: a lodger. Civil Code Section 1946.5 uses it for someone renting a room in a home the owner lives in. It applies where the owner keeps "a right of access to all areas" and overall control.

That section's notice rule for ending the arrangement applies "only to owner-occupied dwellings where a single lodger resides." A landlord-tenant attorney can tell you how it fits your home.

The answer decides which policy fits. California's booking-refund law (Civil Code Section 1748.80) treats a stay of "30 or fewer consecutive days" in all or part of a home as a short-term rental. A roomer who stays month after month lives there.

Short stays raise other questions, covered in how a homeowners policy treats paying guests. Regulators wrote in 2016 that some insurers attach a home-sharing exclusion, while others sell an add-on that gives hosting coverage back.

You need a landlord policy, which insurers call a dwelling fire policy, when you move out and rent the whole home. Renting out the whole house covers that switch.

The FAIR Plan draws its line at a year. Its dwelling page lists a Seasonal Rental type, for homes rented all or partly on terms shorter than a year. Its 2021 rules rated an owner's home as a short-term rental if any part was rented for less than 365 days.

Its 2020 home-sharing add-on (insurers call it an endorsement) counts renting any part of the home for under 365 days as home sharing. A roomer with a lease shorter than a year, or no lease at all, fits that definition. Whether the Plan still uses that form is not public, so ask the Plan how your own policy treats a roomer.

A renters policy in the roomer's name covers the roomer's own things and liability, which yours leaves out. The Department of Insurance's residential guide, revised January 2026, says a renters policy covers a renter's "personal contents," plus personal liability and medical payments to others.

Your policy does not cover the roomer's own liability, because a roomer who is not your relative is not an insured person under the model form. State regulators wrote in 2016 that a renters policy often covers injuries or damage the renter causes, but not those caused by defects in the home.

So ask the roomer to buy a renters policy before moving in, and keep a copy of the declarations page.

Casa's questionnaire asks about this too: whether any part of the home is rented, even one room, and what kind of renting it is.

Put the same facts to your insurer in writing, and keep its answers with your policy:

• How many people rent rooms from you, and whether any is a relative.
• Whether each roomer has a lease, and for how long.
• Whether any room is rented for short stays, even a few nights a year.
• Does my policy pay lost rent if covered damage closes the room?
• Is theft covered in the rented room, and in shared spaces such as the kitchen?
• What liability limit does the policy carry, and is a higher one available?