Clark County, NV Fire Regulations: Smoke Detectors (2026)

Clark County Department of Building and Fire Prevention adopts the 2018 International Residential Code (IRC) Section R314 and International Fire Code (IFC) Section 907 for smoke and carbon monoxide alarms. In all residential dwellings smoke alarms are required inside every sleeping room, immediately outside each sleeping area (in the hallway serving bedrooms), and on every level of the dwelling including basements. New construction, additions, alterations, and repairs triggering a permit require interconnected, hardwired smoke alarms with battery backup; interconnection means activation of one alarm sounds all alarms in the dwelling. Existing dwellings without hardwired systems may use 10-year sealed lithium battery units meeting NFPA 72. Carbon monoxide alarms are required outside each sleeping area in dwellings with fuel-burning appliances (gas furnace, water heater, fireplace) or attached garages. Landlords are responsible for installing working alarms at the start of tenancy; tenants are responsible for routine battery replacement (NRS 118A.355). Nonfunctional alarms are cited by the Clark County Fire Department during inspections and following fire incident investigations. Short-term rentals have separate stricter alarm verification requirements.