Wylie, TX Building Safety: Fire Sprinkler Requirements (2026)

Section 22-42's Building Code amendments add § 903.2.11.9, requiring an automatic sprinkler system throughout any building with a floor area of 6,000 square feet or more, and throughout any existing building enlarged to reach that size. The amendment specifically states that fire walls do not define separate buildings for this purpose, closing off an obvious workaround where an owner might argue a fire wall splits one large structure into two smaller, unsprinklered ones. Residential structures get a lighter path: § 903.3.1.3, also adopted by § 22-42, permits one- and two-family dwellings, Group R-3 occupancies, Group R-4 Condition 1 occupancies, and townhouses to install sprinklers under the NFPA 13D residential standard instead of the full commercial NFPA 13 system, or to follow state law where it applies.

The building official enforces both provisions as part of the adopted 2021 International Building Code under § 22-41, and building plans that omit required sprinkler protection cannot clear the permitting and inspection process described in §§ 22-2 through 22-4. Because sprinkler protection sits inside chapter 22's building safety framework, a violation can draw a fine of up to $2,000.00 per offense under the safety-ordinance tier of Code § 1-13(c)(1), well above the $500.00 default that applies to most other code sections.