R317.2.1 Alterations and additions. When interior alterations or additions requiring a permit occur, or when one (1) or more sleeping
rooms are added or created in existing dwellings, the individual dwelling unit shall be provided with smoke alarms located as
required for new dwellings; the smoke alarms shall be interconnected and hard wired.
EXCEPTIONS: 1. Smoke alarms in existing areas shall not be required to meet the requirements of R317.5 where the
alterations do not result in the removal of the interior wall or ceiling finishes exposing the structure unless there is an attic,
crawlspace, or basement available which could provide access for hard wiring and interconnection without the removal of
interior finishes.
2. Repairs are exempt from the requirements of the section.
