What this covers
A home security system is a set of devices that detect and record activity at the doors, windows and yard: door and window contact sensors, motion detectors, glass-break sensors, cameras, a video doorbell and a keypad or control panel. Installation starts with a walk-through of the entry points and the areas you want watched. The installer then mounts the devices, runs low-voltage wiring or pairs wireless ones, connects power and the home network, and tests every sensor. Whether the system is self-monitored or professionally monitored is your choice, and the installer sets it up to match.
When to call
- Moving into a home with no system, or an old one that no longer works.
- Wanting to see who is at the door or in the yard while you are away.
- Adding sensors or cameras after a remodel, an addition or a new garage.
- Replacing a dated alarm panel with one you can check from your phone.
What to expect
- Walk-throughThe installer reviews the doors, windows, yard and the coverage you want.
- PlanYou get a layout of the devices, how each is powered and connected, and the monitoring options.
- InstallSensors, cameras and the keypad are mounted, wired or paired, and connected to the network.
- Test and hand overEach device is tested and you are shown how to arm, disarm and check the system.
Get a certified company
Look up a certified company by ZIP code. Every company's license, insurance and trades are verified before it is listed, and placement is never paid.
Questions people ask
Is a wired or wireless system better?
Wired devices suit new construction and open walls; wireless devices install with little or no wall work. Many systems mix the two, with wired cameras and wireless sensors.
Does a security system need an electrician?
Battery and plug-in devices often do not. Hardwired cameras, a new circuit for the panel or wiring through finished walls is electrical work for a licensed electrician or low-voltage installer.
Who watches the alarms?
With self-monitoring, alerts go to your phone. With professional monitoring, a monitoring center receives the alarm and follows the response plan you set up with the company.
Related: Smart home wiring · Lighting installation · Outdoor lighting · All electrical
This page describes what the service involves. The company you hire sets the scope, the schedule and the price, and your contract is with that company. We verify credentials and collect reviews from real jobs. We do not guarantee any company's workmanship. Safety steps are general guidance. When in doubt, leave the home and call 911.