Habitability & Repair-and-Deduct — Civil Code §§ 1941–1942

California law does not leave "habitable" undefined. Civil Code § 1941.1 lists the specific conditions a dwelling must have to be tenantable, § 1941.3 sets minimum lock and window-security requirements, and § 1942 gives the tenant a direct remedy — repair-and-deduct — when the landlord won't fix a problem it lists.

A parallel track runs through the Health and Safety Code: § 17920.3 defines a "substandard building" for local code enforcement, and § 17980 sets out how a city or county actually forces repairs. A single bad condition can matter under both tracks at once, which is why GoCodebook checks all five sections together before answering a habitability question.

Under § 1941.1, a dwelling is untenantable if it substantially lacks: effective waterproofing and weather protection (including unbroken windows and doors); working plumbing and gas facilities; hot and cold running water connected to an approved sewage system; working heating; code-conforming electrical lighting and wiring; clean, debris-free grounds and building areas; adequate garbage receptacles; floors, stairways and railings in good repair; and, for a residential hotel, a locking mail receptacle.

Two items were added for leases entered into, amended, or extended on or after January 1, 2026: a working stove and a working refrigerator (§ 1941.1(a)(10)–(11)). A landlord must repair or replace either one within 30 days of learning it is subject to a manufacturer or public-entity recall (§ 1941.1(c)(1)). Both requirements are excused for permanent supportive housing, single-room-occupancy units, residential hotels, and units with shared or communal kitchens (§ 1941.1(b)).

Section 1941.3 requires an operable deadbolt on each main swinging entry door, extending at least 13/16 of an inch beyond the strike edge, on every unit as of July 1, 1998. It also requires operable locking devices on windows designed to be opened — excluding louvered windows, casement windows, and any window more than 12 feet vertically or 6 feet horizontally from the ground, a roof, or another platform (§ 1941.3(a)(2)).

The tenant is responsible for telling the landlord when a lock stops working; the landlord is only liable for a violation if it fails to fix the problem within a reasonable time after getting notice (§ 1941.3(b)). Buildings that a government body has designated as historically significant are exempt from these requirements entirely (§ 1941.3(f)).

If the landlord neglects to repair a condition that makes the unit untenantable within a reasonable time after written or oral notice, the tenant may repair it themselves — as long as the cost does not exceed one month's rent — and deduct that cost from rent due, or the tenant may vacate and be discharged from further rent (§ 1942(a)). Acting after the 30th day following notice is presumed to be a reasonable wait, though a tenant may act sooner if the circumstances require it (§ 1942(b)).

This remedy is capped: it is not available more than twice in any 12-month period (§ 1942(a)). It is also unavailable if the tenant caused the condition through their own violation of the law (§ 1942(c)). A landlord who retaliates against a tenant for using this remedy runs into § 1942.5's retaliation rules.

Health & Safety Code § 17920.3 defines a "substandard building" through a categorical list — inadequate sanitation, structural hazards, faulty weather protection, nuisance conditions, fire hazards, and more — regardless of the property's zoning. Under § 17980, an enforcement agency must give 30 days' notice to abate a violation before acting, or a shorter period if it finds an immediate threat to health and safety (§ 17980(a)).

The agency must let the owner choose repair or demolition, and it must prefer repair whenever it is economically feasible to do so without repairing more than 75 percent of the dwelling (§ 17980(c)(2)). A person who buys a foreclosed property gets an extra 60 days after taking title, while diligently abating a violation, before the agency may act — unless a shorter period is needed to address an immediate threat (§ 17980(a)).