Smoke Detectors: Marana vs Tucson
How do smoke detectors rules compare between Marana, AZ and Tucson, AZ?
Marana has fewer restrictions than Tucson.
Marana, AZ
Pima County
Marana adopts the International Residential Code requiring smoke alarms in each bedroom, outside sleeping areas, and on every level of a dwelling. Carbon monoxide detectors required where fuel-burning appliances or attached garages exist.
View full Marana rules →Tucson, AZ
Pima County
Tucson requires smoke alarms in every sleeping room, outside each sleeping area, and on every level of all residences under the International Residential Code as adopted by Tucson Building Code. Interconnected hardwired alarms with battery backup are required in new construction and major remodels.
View full Tucson rules →Key Facts Comparison
| Fact | Marana | Tucson |
|---|---|---|
| Code | International Residential Code (adopted) | - |
| Smoke Alarms | Every bedroom, outside sleeping areas, each level | - |
| CO Detectors | Required with fuel-burning appliances | - |
| Type | Hardwired, interconnected, battery backup | - |
| Required Locations | - | Each bedroom, outside sleeping area, each level |
| New Construction | - | Interconnected hardwired with battery backup |
| CO Alarms | - | Required with gas appliances or attached garage |
| STR Certification | - | Annual self-certification |
| Code Basis | - | IRC as adopted in Tucson Building Code |
Highlighted rows indicate differences between cities.
Marana FAQ
Where do smoke detectors need to be installed in Marana homes?
Per the adopted International Residential Code: in every bedroom, in the hallway outside sleeping areas, and on every level of the home. They must be hardwired and interconnected with battery backup in new construction.
Are carbon monoxide detectors required in Marana?
Yes, in homes with fuel-burning appliances such as gas furnaces or water heaters, or homes with attached garages.
Tucson FAQ
Do Tucson homes need CO detectors?
Yes if the home has gas appliances, a gas water heater, gas furnace, fireplace, or an attached garage. CO alarms must be placed outside each sleeping area.
Can I use 10-year sealed battery smoke alarms in Tucson?
Yes for existing homes as a replacement. New construction requires interconnected hardwired alarms with battery backup and cannot rely on battery-only alarms.
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