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San Marcos, TX Fire Regulations: Smoke Detectors (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

STR requirement
Smoke and CO detectors required
Tied to
Short-term rental permit
Base code
2021 IRC, adopted unamended
Adoption clause
City Code Sec. 14.002
Penalty
Permit suspension or revocation

Summary

San Marcos requires working smoke and carbon monoxide detectors in every short-term rental unit as a condition of the city's short-term rental permit, on top of the smoke-alarm standard built into the adopted building code.

(3)Smoke and carbon monoxide detectors shall be installed and conform to all applicable city-adopted codes, regulations, and ordinances.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 41).

Full Breakdown

Under Sec. 34.809(d) of the city's Rental Property Standards ordinance, short-term rental operators must install smoke and carbon monoxide detectors that conform to the city's adopted codes, alongside a mounted fire extinguisher, posted evacuation plan, and compliant emergency escape openings, before the city issues or renews a short-term rental permit. Citywide, the underlying smoke-alarm standard flows from the 2021 International Residential Code, which San Marcos adopted under Sec. 14.002 without amending the alarm provisions (Section R314): confirmed by checking the article's local amendment list, which touches only foundation, roof-permit, and fire-sprinkler sections, not R314.

Violations & Fines

Missing or nonconforming smoke/CO detectors in a short-term rental violates Sec. 34.809's life-safety standards and can trigger permit suspension or revocation under Sec. 34.816-34.817; failures under the adopted building code are separately enforceable as code violations.

Frequently Asked Questions

Does San Marcos require smoke alarms in rental units?
Yes. Short-term rentals must have smoke and carbon monoxide detectors under Sec. 34.809(d)(3), and all dwellings must meet the smoke-alarm rules of the city's adopted 2021 International Residential Code.
Has San Marcos changed the IRC's smoke alarm requirements?
No. The city adopted the 2021 IRC under Sec. 14.002 without amending Section R314, so the model code's standard placement and interconnection rules apply as written.

Sources & Official References

Other rules in San Marcos

Fire Pits & Backyard FiresSome RestrictionsOutdoor BurningSome RestrictionsNoise Ordinances: Amplified Music & Outdoor SoundSome RestrictionsNoise Ordinances: Vehicle NoiseSome RestrictionsParking Rules: Commercial & Oversized VehiclesSome RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: Loading ZonesLight RestrictionsFence Regulations: Fence Permit RequirementsSignificant Restrictions

All San Marcos rules

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