Wylie, TX Building Safety: Carbon Monoxide Detectors (2026)

Wylie adopts the 2021 International Residential Code as its one- and two-family dwelling code under Sec. 22-141, which includes IRC Section R315, the carbon monoxide alarm chapter requiring alarms in dwellings with fuel-burning appliances or attached garages. Sec. 22-142 then amends Section R315.2.2, the subsection governing when alterations, repairs and additions to an existing dwelling trigger a duty to add carbon monoxide alarms, by adding a second exception for work that consists only of installing, altering or repairing electrically powered mechanical systems or plumbing appliances.

That carve-out means a homeowner replacing a water heater's electric components or a plumbing fixture is not automatically forced to retrofit a whole-house carbon monoxide alarm system the way a fuel-burning-appliance swap or an addition would. The Building Inspections Division reviews permit applications for the alterations covered by this section under the general permit requirement in Sec. 22-4, and the amendment was carried through the city's 2021 IRC adoption cycle alongside related amendments such as the deletion of the residential fire-sprinkler mandate under Section R313.2, reflecting the 2009 state law barring cities from requiring sprinklers in one- and two-family homes.

Because carbon monoxide alarm compliance is a life-safety matter, a violation of the amended alteration trigger is enforced under the city's general penalty section, Sec. 1-13, which allows a fine of up to $2,000.00 per offense for fire and safety violations, with each day of noncompliance a separate offense.