Alarm Specialist & Electronics
Verified Pro
10½+ years online5.0(2)
Alarm System Installation in St. Louis, MO
Compare 23 alarm system installation contractors near you in St. Louis and surrounding area with an average rating of 4.5/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 22, 2026
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Verified Pro Installers
alarmspecialist-stl.com
A.M.S. EHD/GPS Provider
Verified Pro
~7 years online4.9(171)
Citywide Alarms
Verified Pro
13+ years online4.8(127)
Tech Electronics of St. Louis
Verified Pro
29½+ years online4.4
GCI Security, Inc.
Verified Pro
14½+ years online4.2(27)
Other Businesses in This Area
Smoke Detector Pro
5.08½+ years onlineSt Louis Security Cameras & Alarms
5.0~10 years onlineBurnes-Citadel Security
4.926 years onlineiTrue Security
4.8~14 years onlineAudio Ace
4.7~12 years onlineAlarm Security
4.6~19 years onlineWill Electronics, A Division of RapidFire Safety & Security
4.528½+ years onlineABF Security
4.427+ years onlineMidwest Alarms Plus
4.312½+ years onlinePhilibert Security Systems, Inc.
4.026 years onlineSentry Security Agency Inc
3.824½+ years onlineProtection 24 Inc Auto Alarm
3.215+ years onlineCentral District Alarm Inc.
2.526+ years onlineAlarm System Installation in Nearby MO Cities
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Alarm System Installation in St. Louis, MO
St. Louis alarm system installers in this directory cover Central West End, the Hill, Soulard, U-City, and surrounding St. Louis County. A typical 3-bedroom St. Louis home with door/window contacts, motions, glass-break, and 24/7 monitoring runs $1,800-$3,500 installed plus $35-$60/month for monitoring.
St. Louis Metropolitan Police charges for false-alarm response after the second event. Most monitored systems use cellular over LTE. Missouri tornado exposure makes battery-backed panels essential.
Frequently Asked Questions
- Do I need a permit for an STL alarm?
- St. Louis Metro Police requires alarm registration in some scenarios.
- Will my alarm work during a tornado?
- Battery-backup panels with cellular monitoring ride through wind-related power outages.
- Should my alarm integrate with cameras?
- Most modern systems do.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across St. Louis and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.