CO alarms are required in newly constructed one- and two-family dwellings, townhomes less than 3 stories, apartment buildings, dormitories, adult/child care facilities and assisted living facilities which contain a fuel-burning-appliance or an attached garage. Effective date: June 2011

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Louisville-Jefferson County: Upon sale, single- and multi-family dwellings must have a hard-wired smoke alarm or a 10-year sealed battery smoke alarm. Effective date: April 2014

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Smoke alarms are generally required in residential settings. Hard-wired smoke alarms are required in all new construction.

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