Hardwired smoke detector installation in Orange County typically costs about $150 to $300 per alarm when replacing existing units, and more for new interconnected locations. California requires smoke alarms in every bedroom and hallway outside sleeping areas, and CO alarms in homes with gas appliances, a fireplace or an attached garage. Call 657-201-1586 to get connected with a licensed electrician.
California smoke and CO alarm basics
- Smoke alarms in each bedroom, outside each sleeping area and on every level
- Carbon monoxide alarms outside sleeping areas and on every level in homes with fuel-burning appliances, a fireplace or an attached garage
- Battery-only smoke alarms sold in California must have a sealed 10-year battery
- Hardwired, interconnected alarms are required in new construction and are often required when you remodel with a permit
- Smoke alarms should be replaced about every 10 years; CO alarms every 5 to 10 years, per the label
Landlords and home sales
Landlords must provide working alarms, and sellers must certify compliance at sale. A licensed electrician can bring alarms up to standard for a rental turnover, escrow or city inspection.
Smoke & CO Detectors across Orange County
We connect callers with electricians for smoke & co detectors in every Orange County city, including:
- Irvine
- Lake Forest
- Anaheim
- Huntington Beach
- Fullerton
- Costa Mesa
- Westminster
- Santa Ana
- Mission Viejo
- San Clemente
- Garden Grove
- Laguna Niguel
- Laguna Beach
- Laguna Hills
- Newport Beach
- Tustin
- Orange
- Brea
- Aliso Viejo
- Dana Point
- Yorba Linda
- La Habra
- Rancho Santa Margarita
- San Juan Capistrano
- Fountain Valley
- Buena Park
- Placentia
- Los Alamitos
- Ladera Ranch
- Villa Park
- Seal Beach
- Stanton
- La Palma
- Newport Coast
- Cypress
Last updated October 2026. Prices are planning ranges, not quotes. Your contractor confirms the price before work begins.