Age and Endurance. Most experts say the average lifespan of a wired security system is about ten years, and once it passes this mark, there is a high chance that the system will not function reliably. It also means that some companies will charge higher prices for repairing the older, out-of-date system.
The expected lifespan for consumer electronics is four to five years. However, according to Fidelity-ADT, many homeowners keep their alarm systems for around seven years. As security systems age, they become less reliable and may not provide the same level of protection as they did when first installed.
Aim to change your burglar alarm batteries every three to five years. Most modern alarms come with a button which can test the life within your existing battery and inform you if it requires replacing.
Your home security system's age is a significant indicator of when it needs to be replaced. The average life span of a home security system is 10 to 15 years. Once it starts nearing this point, you might want to consider getting home security upgrades.
It is important to service it at least once a year to prevent system failure. It boosts the system performance and makes it more reliable and robust. Regular service and maintenance help the alarm system function without causing any trouble and save you from any unexpected system failure.
If you find it's about time to replace your smoke alarm, you are probably asking yourself “Do I need an electrician to replace hardwired smoke detectors?” The answer is yes, as handling electrical circuits can be risky without proper knowledge.
In a wireless system
A useful lifespan of around 3 to 4 years is typical. Wireless devices such as door contacts and movement detectors are usually powered by a 3v lithium battery, life expectancy is determined by how often the device sends a signal to the control unit. The typical life expectancy is 18 - 36 months.
Professional electricians with the necessary training can service a home alarm system. A qualified tradesperson can repair server faults and resolve other electrical issues. Unless you have previous experience working with electrical alarm systems, we recommend leaving service and maintenance work to the professionals.
98% of the time an alarm rings during a power cut is because this battery is dead! Therefore when the mains is removed, the main control panel battery can't keep the system running so the external sounder starts ringing to inform you there's a problem.
Alarms fitted to your home/business or vehicle should not become a source of nuisance to your neighbours, you have a legal responsibility to ensure that any alarm activated should ring for: a maximum 20 minutes – home/business; and. your vehicle alarm should have a 5 minute cut-out device fitted.
If the keypad for your home alarm system starts beeping, it's a sign that the power supply is low and the battery might need to be replaced. The keypad may beep infrequently at first, but it will beep more consistently as the power supply drains.
Environmental Factors – Open windows can let in wind which can cause objects to move and trigger sensors. Obstructions To Sensors – Dust, cobwebs, or even larger spiders near the sensors can set it off. Electrical or Battery Problems – A low battery or power fluctuations can lead to alarm malfunctions.
Smoke alarms should be replaced 10 years from the date of manufacture. Combo smoke/CO alarms should be replaced after 5-7 years (depending on the model). Put the alarm back on the ceiling or wall if it is less than 10 years old. Replace alarm(s) older than 10 years with new units.
Undeniably, a quality burglar alarm system is a much-needed investment. Whether it's deterring burglars off your property, or scaring them away should they manage to break-in, their effectiveness is indisputable, and above all, they provide you with the peace of mind knowing that your home is safe at all times.
A “chirping” sound means that it's time to change batteries. Because alarm sensors wear out, replace each alarm at least every 10 years. Also, alarms have labels showing when they were made. If you don't see a label, the alarm is old and must be replaced.
Some parts of your security system, like the wiring, can last for 50 to 70 years if installed correctly. However, due to the ever-evolving nature of technology, security cameras, digital video recorders, and software systems may become outdated or experience early failure.
Home security systems can start at $150 for a basic DIY alarm kit and can cost as much as $2,000 or more for a comprehensive, professionally installed system.
Burglars hate alarm systems - and for very good reason! Any indication that your home has a security system, such as yard signs, window stickers and a big alarm box, can act as a burglar deterrent and help prevent your home from being burgled.
We recommend changing all your wireless sensor batteries on an annual basis or as directed by your ADT system.
Comparing House Alarms to Other Household Appliances
A typical house alarm system often uses less than 70 watts a year.
Overall, it is incredibly important to service your intruder alarm system at least once a year to ensure that your commercial or domestic property is fully protected and that it will respond accordingly to any situation to protect those around you as well as your valuable belongings.
The average base cost for a burglar alarm in 2025 is £562, including equipment (£269) and installation (£293). Among eleven common home security brands in our database, the price range runs from £120 for DIY bell-only home alarms up to £1,139 for fully equipped smart security systems with professional installation.
Wired security systems may have already become a rarity in today's home security market, but they're not completely phased out. Especially with our top-pick wired security systems that offer a mix of wireless and wired equipment, you can still get your money's worth.