How to Hire a Security System Installer

What security installers do

Alarm systems: door and window sensors, motion detectors, glass-break sensors, keypads and sirens.
Cameras: indoor and outdoor cameras, video doorbells, and recorders or cloud storage.
Monitoring: professional monitoring that calls you and dispatches help, or self-monitoring through an app.
Access control: smart locks, keypads, gate and garage control.
Fire and life safety: monitored smoke, heat and carbon monoxide detectors, where the installer is licensed for it.

How licensing usually works

Alarm and security licensing varies more than most trades:

Many states license alarm companies, and some also require each installer to register and pass a background check.
The agency differs by state: it may be the contractor licensing board, a public safety or private security agency, or the state fire marshal (especially for fire alarms).
Some states don't license alarm work at the state level, and cities or counties may.
Many cities require an alarm permit or registration for monitored systems, to cut down on false-alarm dispatches. Ask the installer whether yours does and who files it.

Running new power for equipment is electrical work, which usually needs a licensed electrician.

We show the license details we found in public records with the date we checked. Confirm with your state before you hire.

Questions to ask

What license does your company hold in this state, and do your technicians need to be registered?
Is monitoring included, and is it month to month or a contract? How long, and does it renew automatically?
Who owns the equipment if I cancel or move?
Can I use the system and cameras without a monthly plan?
Where is camera video stored, for how long, and who can see it?
Will you file the alarm permit if my city requires one?
What's the warranty on equipment and installation?

Red flags

Door-to-door pressure to sign today.
A “free” system tied to a long contract you can't see in writing first.
No license number where your state requires one.
Vague answers about who owns the equipment and where video goes.

Before you sign

Get the quote and any monitoring agreement in writing. Read the cancellation terms, the renewal terms and the price after any promotional period. For many sales made at your home, the FTC's Cooling-Off Rule gives you three days to cancel, and some states add their own rules. Ask the installer how that applies to your contract.

Common questions

Do alarm installers need a license?

In many states, yes: alarm companies need a state license, and some states also require installers to register and pass a background check. Who issues it varies (a contractor board, a public safety or private security agency, or the fire marshal), and some states don't license alarm work at the state level. Your city may also require an alarm permit for a monitored system.

Do I have to sign a monitoring contract?

No. Many systems can be self-monitored through an app, or monitored month to month. If you do sign a contract, check its length, whether it renews automatically, the cancellation terms, and who owns the equipment.

Are wired or wireless systems better?

Both work. Wired sensors and cameras avoid batteries and Wi-Fi drops and suit new builds or open walls. Wireless is faster to install in a finished home. Many systems mix the two.

Last reviewed November 8, 2026. License rules change and differ by state; confirm details with your state's licensing board and your local building department.