Key insights
Current standard smoke-alarm prices commonly start around $15. Hardwired, interconnected and smart models can cost $25 to $55 or more each.
Jump to insightThe biggest cost variable isn't the sensor alone; it's whether the new alarm has to work with existing wiring, interconnection or a monitored smart-home system.
Jump to insightA home warranty may cover the cost of repairing or replacing a hardwired smoke detector under your electrical plan.
Jump to insightSmoke detector replacement costs
How much you pay to replace your smoke detector comes down to the type of smoke detector and additional costs like installation and monthly fees.
Smoke detector costs: Wired vs. battery-powered
There are two main types of smoke detectors: wired and battery-powered. Most homeowners pay about $15 to $55 for a replacement smoke alarm (before installation).
Wired smoke detectors tend to cost more, but not too much. You’ll probably end up spending around $10 more for wired.
Battery-powered smoke detectors are both cheaper and easier to install than wired models, and they still work if the power goes out. On the other hand, wired smoke detectors have two potential sources of power, so they are considered the most dependable.
Some wired smoke alarms can also connect to your security system and alert emergency services when there’s a fire. This can be particularly helpful for those with hearing issues.
Wired and battery-operated smoke detectors have features and detection types that can also affect the price:
Ionization: This detection system is less expensive than others. Ionization smoke detectors can cost anywhere from $15 to $25.
Photoelectric: This type of system is particularly good at detecting smoldering fires. You can expect to pay under $30 for one.
Smart-home features: Few smart detectors are on the market. They offer features like fire alerts, the ability to shut off alarms from your phone, and smart-assistant capabilities. These detectors cost $50 to several hundred dollars.
Dual-sensor: These combine ionization and photoelectric detection (the National Fire Protection Association recommends using both types of detection in your home). Because they combine two different technologies, dual-sensor smoke detectors can cost around $40 to more than $150.
Pro tip
Consider other costs before you replace your smoke detectors. If you get a smart smoke detector or one that connects to a security service, for instance, you may need to sign up for the monthly plan. Our team reviewed quotes from various companies and found these can run anywhere from $5 to $60 per month.
Also, if you choose to move from battery-powered to wired detectors, you’ll need to hire an electrician to install them. Labor costs depend on several factors, including ceiling height, wiring requirements, and local codes and rates.
How to replace a smoke detector yourself
Battery-powered smoke detectors are simple enough to install in just minutes. You usually just need a screwdriver to complete the installation. If you get the same brand as your old smoke detector, you may be able to install it on the old wall bracket.
On the other hand, you likely need a licensed professional to install a wired smoke detector. This way, you can be sure your detectors meet local codes, which helps ensure your safety. While you may be able to replace wired smoke detectors if you're comfortable with basic wiring, it’s smart to be on the safe side and hire a professional for installation.
Does your home warranty cover smoke detector replacement?
While you may think your home warranty covers only appliance repair and replacement, you may be surprised to find out that some home warranty companies also cover smoke detector replacement. Often, smoke detector replacement comes with higher-level home warranty packages.
» LEARN: Home warranty costs
Compare home warranties with smoke detector coverage
| Company | Customer rating | Smoke detector coverage | Monthly starting cost | Service fee(s) | |
|---|---|---|---|---|---|
 Cinch Home Services | Get a Quote | 4.1 | Yes | $27.99 | $100, $125 or $150 |
 OneGuard Home Warranties | Learn More | 1.0 | Yes | $29.99 | $100 or $125 |
 Fidelity National Home Warranty | Learn More | 1.2 | Yes | $42.50 | $85 |
 HomeSafe | Learn More | 4.3 | Yes | $69 | $65 |
FAQ
How long does a smoke detector last?
Smoke detectors generally last up to 10 years, though some may die early due to improper maintenance.
Do I need to have my smoke detector serviced regularly?
Battery-powered smoke detectors need a battery change about once a year, according to the National Fire Protection Association, but if your smoke detector beeps or chirps, it needs a battery change sooner. Test all smoke detectors each month.
Does a smoke detector have a warranty?
Smoke detectors come with a manufacturer’s warranty that can last for several years. Make sure to check the documentation that comes with your smoke detector to learn about specific terms and limitations. You may also be able to get an extended warranty through the retailer when you purchase the smoke detector.
Do I need an electrician to replace smoke alarms?
If your smoke detectors are wired, you’ll generally need an electrician to install them. If you opt for battery-powered smoke detectors, you can likely install them yourself.
Bottom line
You can expect to pay anywhere from $15 to several hundred dollars to replace your smoke detector. It all depends on how many you need, the type of smoke detector you want and your installation costs. If you have a home warranty, see if it covers replacement before you shop for new detectors.
Article sources
ConsumerAffairs writers primarily rely on government data, industry experts and original research from other reputable publications to inform their work. Specific sources for this article include:
National Fire Protection Association, “What Kind of Smoke Alarm Should I Buy?” Accessed Oct. 4, 2026.
National Fire Protection Association, “Ionization Vs. Photoelectric.” Accessed Oct. 4, 2026.
National Fire Protection Association, “How Do I Maintain My Smoke Detector?” Accessed Oct. 4, 2026.
National Fire Protection Association, “Changing Clocks and Batteries.” Accessed Oct. 4, 2026.
