Fire alarm systems must be installed by qualified professionals, such as licensed electrical contractors or certified fire and life safety technicians. Hiring qualified pros is vital because these systems must comply with strict local building codes, safety regulations, and insurance standards.
If you choose to have a mains-powered alarm, make sure it's installed by a qualified electrician. It's also possible to fit extra automatic 'fire suppression' systems at home – that's things like sprinklers.
Handyman service professionals can inspect, replace, and install smoke detectors to help protect your home and family.
The primary smoke detector that works with Google Nest is the Google Nest Protect (2nd Gen), which is designed for full integration with the Nest app, phone alerts, and other Nest devices. As an alternative, the First Alert SC5 Smart Smoke & CO Alarm is an officially recommended partner that works alongside Nest Protect in the Google Home app.
Some fire departments will install battery-operated smoke alarms in your home at no cost.
On average, installation costs for a residential or commercial fire alarm system typically range from $600 to $1,000, with more advanced systems costing up to $5,000. Additionally, costs per square foot can range from $1 to $6, depending on the complexity of the installation and specific features required.
Firefighters recommend dual-sensor smoke alarms (which combine both photoelectric and ionization technology) or interconnected alarms. They also stress that the brand matters less than choosing models featuring 10-year sealed batteries and ensuring you have detectors on every floor and outside all sleeping areas.
If you are replacing an expired Nest Protect, the recommended replacement is the First Alert SC5 Smart Smoke & CO Alarm. This device was developed in collaboration with Google and is designed to act as a seamless, direct swap for Nest Protects on your existing mounting plates and wiring harnesses.
Yes, opening a windows helps by diluting carbon monoxide (CO) with fresh air. However, it is not a substitute for evacuation and professional repairs.
Install smoke alarms inside each bedroom, outside each sleeping area and on every level of the home, including the basement. On levels without bedrooms, install alarms in the living room (or den or family room) or near the stairway to the upper level, or in both locations.
An electrician is trained to handle electrical wiring safely and is knowledgeable about local building codes. In many cases, you'll want to hire an electrician for proper installation—especially for hardwired smoke detectors, which require knowledge of electrical systems and wiring.
If you make cash payments to independent contractors, the first thing you should know is that there is nothing inherently illegal about doing so. Cash is still a perfectly good form of payment. If you have cash on hand and want to use it to pay your contractors, then you can absolutely do so.
If your home was built after 1986, it will have at least one hard wired smoke alarm connected directly to your electrical panel. It is not acceptable to replace a hard wired alarm with one that is battery operated. A home must maintain at least the same level of protection as originally required. It is the law.
The US National Fire Protection Association (NFPA) have issued NFPA Standard 72, National Fire Alarm and Signalling Code, which states that all smoke alarms (including alarms that use 10 year batteries, and those that are hard wired) should be replaced when they are ten years old, or sooner if they don't respond ...
Smoke Detector placement and installation
Sleeping areas need the most protection. One detector in a short hallway outside the bedroom area is usually adequate. Hallways longer than 30 feet should have one detector every 30 feet. A smoke detector should be installed in every room that will be occupied.
Generally, fire departments will not repair or replace smoke alarms. They may offer help with smoke alarm installation or testing, particularly for vulnerable groups or in the context of a fire safety program, but will not provide routine repairs.
The most reliable and trusted smoke detector brands are First Alert (BRK) and Kidde. Both manufacture high-quality, industry-standard alarms with a long-standing track record in fire safety. For tech-forward homes, Google Nest is highly recommended for its smart integration and self-testing features.
On March 28, Google Nest announced two major changes to its Google Home lineup of smart devices. First, it will end sales of its Nest Protect smoke detector, which is featured on our list of recommended smoke detectors as one of the smartest fire alarms available.
Yes, you should get a combination smoke and carbon monoxide (CO) detector, as they save space, simplify maintenance, and reduce the number of devices you have to manage. They are highly recommended for covering two critical life-safety needs in one unit.
The best smart smoke detectors of 2026 combine reliable multi-sensor fire and carbon monoxide detection with instant mobile alerts, remote silencing, and whole-home interconnectivity. Top models integrate effortlessly with major smart home ecosystems like Google Home, Amazon Alexa, or Ring.
Hardwired smoke detectors connect directly to your home's electrical grid and offer battery backups, ensuring continuous protection. They easily interconnect so that if one alarm sounds, every alarm in the house goes off. Battery-powered detectors are standalone units that are easier to install but require routine maintenance.
Mains-powered alarms cost more, as they must be installed by a qualified electrician. Expect to pay £75 to £125 per alarm. Smart fire alarms carry a higher price tag. A battery-powered smart alarm with installation costs around £80 to £100, while a mains-powered smart alarm ranges from £105 to £250.
In this guide, we'll walk you through the four main types of commercial fire alarm systems: Conventional, Addressable, Wireless, and Hybrid. Understanding how each one works will help you choose the setup that ensures reliable safety, simple upkeep, and better peace of mind for your team.