Smoke detector installation in Phoenix East Valley costs $90–$150 per unit. Battery-powered detectors start at $55 for simple installs. A whole-home hardwired and interconnected system for a 3-bedroom house runs $200–$500 total. handoff.ai Phoenix data shows a typical range of $67–$139 per unit installed.
Smoke Detector Installation Cost Breakdown
| Service | Typical Cost |
|---|---|
| Battery-powered detector (customer supplies) | $55 – $90 |
| Standard installation, pro supplies detector | $90 – $150 per unit |
| Hardwired replacement (same wiring) | $75 – $120 per unit |
| Whole-home install (5 units, interconnected) | $200 – $500 total |
Source: handoff.ai Phoenix data, Smoke Alarm Medic Maricopa County (starts at $55), HomeAdvisor 2025
Factors That Affect the Price
- Power type: Battery-operated detectors require no wiring. Hardwired units need an electrician and cost more per unit.
- Interconnected systems: When one alarm sounds, all sound. Requires running wire between units for older homes.
- Detector type: Ionization ($5–$25) vs. photoelectric ($10–$30) vs. smart/connected ($50–$150+).
- Number of units: Arizona fire code requires detectors in each bedroom, outside sleeping areas, and on every floor.
What The Toolbox Pro Includes
- Ceiling/wall mounting
- Battery installation and test alarm
- Placement guidance per Arizona code
Frequently Asked Questions
How many smoke detectors does an Arizona home need?
Arizona fire code requires a detector in every sleeping room, outside each sleeping area, and on every level. A typical 3-bedroom home needs 4–5 detectors minimum.
Should I get combo smoke/CO detectors?
Yes, especially if you have a gas appliance, gas water heater, or attached garage. Combination units cover both hazards for roughly $20–$50 more per unit.
