← Small Electrical
Smoke & CO Detector Install / Replacement
We install smoke detectors, carbon monoxide detectors, and combo units. Hard-wired replacements on existing wiring, or battery-only where wiring doesn't exist. Placement follows NFPA code: every bedroom, outside sleeping areas, every level.
Pricing: $65–$95 per unit
Licensed • Insured • Locally Owned in Crystal Lake, IL • Serving 222 Communities Across Northern IL and Southern WI
What's included
- Old detector removal
- New detector mounting and wiring
- Interconnect test (hard-wired units)
- Battery backup verification
Frequently asked questions
How often should I replace smoke detectors?
Every 10 years per NFPA. Check the date on the back — most people are shocked how old theirs are. CO detectors replace every 5–7 years.