All states have laws (statutes) that require landlords to install and maintain smoke detectors in leased residential premises (apartments, homes).

Some states such as Iowa, Maine, Massachusetts, Ohio, and Vermont require photoelectric or ionization sensors—at least in new construction. And Oregon requires smoke detectors with a HUSH mechanism that allows the alarm to be silenced or temporarily desensitized for 7 minutes while a known condition such as cooking is causing the alarm to activate.

Most states also require landlords to install and maintain carbon monoxide detectors in leased residential premises. Smoke and carbon monoxide detectors are widely available in the same device.

In Arizona, state statutes require landlords to provide smoke detectors in residential rental properties. Arizona law mandates that smoke detectors must be installed in accordance with the manufacturer's instructions and local building codes. Landlords are responsible for ensuring that smoke detectors are operational at the beginning of a tenant's lease term. Tenants, on the other hand, are responsible for maintaining the smoke detectors during their tenancy, which includes reporting any malfunctions to the landlord and not disabling the devices. Regarding carbon monoxide detectors, Arizona law requires that they be installed in any dwelling that has appliances, devices, or systems that may emit carbon monoxide or that has an attached garage. These regulations are designed to ensure the safety and well-being of tenants by reducing the risks associated with fire and carbon monoxide poisoning.