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Denton County, TX Fire Regulations: Smoke Detectors (2026)

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

Key Facts

State Law
TX Health and Safety Code Ch. 766
Rental Requirement
One detector per level
Landlord Response
7 days after written notice
New Construction
IRC interconnected alarms required

Summary

Texas Health and Safety Code Chapter 766 requires working smoke detectors in all residential rental properties. Denton County follows state law since it lacks authority to impose additional requirements in unincorporated areas. Landlords must install and maintain detectors in rental units.

City-specific rules exist: Lewisville, and Denton have their own smoke detectors rules that differ from Denton County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Sec. 92.255. INSTALLATION AND LOCATION. (a) A landlord shall install at least one smoke alarm in each separate bedroom in a dwelling unit. In addition: (1) if the dwelling unit is designed to use a single room for dining, living, and sleeping, the smoke alarm must be located inside the room; (2) if multiple bedrooms are served by the same corridor, at least one smoke alarm must be installed in the corridor in the immediate vicinity of the bedrooms; and (3) if the dwelling unit has multiple levels, at least one smoke alarm must be located on each level.

Source: TX Health and Safety Code Ch. 766View official code

Full Breakdown

Texas Health and Safety Code Chapter 766 mandates smoke detectors in residential rental properties statewide. Landlords must install at least one working smoke detector on each level of a rental dwelling, including basements, within the unit. Detectors must be installed according to manufacturer instructions or mounted on the ceiling or wall between six and twelve inches from the ceiling. Tenants must notify the landlord in writing if a detector is missing or not working, and the landlord has seven days to repair or replace it. For owner-occupied homes in unincorporated Denton County, no county ordinance requires smoke detectors beyond what the state building code requires at time of construction. Homes built under the International Residential Code must have interconnected smoke alarms in each bedroom, outside each sleeping area, and on every level. Battery-only alarms are permitted in existing homes. The Denton County Fire Marshal recommends replacing alarms every 10 years.

Violations & Fines

Under TX Health and Safety Code 766.004, a tenant may obtain a court order directing the landlord to install or repair smoke detectors. If a landlord fails to comply within seven days of written notice, the tenant may purchase and install detectors and deduct the cost from rent (up to $25 per unit). Landlords who fail to install detectors may be liable for damages in negligence claims if a fire injury results.

Frequently Asked Questions

Are smoke detectors required in Denton County rental homes?
Yes. Texas Health and Safety Code Chapter 766 requires landlords to install working smoke detectors on each level of a rental dwelling. If a detector is missing or broken, notify your landlord in writing. They have seven days to repair or replace it.
Who pays for smoke detectors in a rental property?
The landlord is responsible for providing and maintaining smoke detectors. If the landlord fails to act within seven days of written notice, the tenant may install detectors and deduct up to $25 per unit from rent.

Sources & Official References

Other rules in Denton County

All Denton County rules

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