CO alarms are required in all newly constructed one and two-family dwellings and town homes not more than three stories. Effective date: July 2011 CO alarms are required in new multi-family dwellings, as well as existing dwellings that undergo renovation, rental properties that have a change in tenancy, and existing multi-family properties that are sold…

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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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