Top-rated alarm or security system installers.

Get matched with top alarm or security system installers in O Fallon, MO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Alarm or security system installers in O Fallon

Avatar for SafeStreets - ADT Authorized Provider
SafeStreets - ADT Authorized Provider
4.9(
296
)

Serving O Fallon, MO and surrounding areas

Angi Approved

In business since 2010

Free estimates

Emergency services offered

"In the past we’ve avoided getting into agreements or contracts with our home security providers but felt comfortable and confident doing so with Safe Streets. Their monitoring and surveillance centers are nationwide and open 24 hours. They made the process really easy and informed us of all the benefits by being under monitoring agreement. Told both of our neighbors about our experience and they plan to sign up too."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

7 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for DST Security
DST Security
5.0(
22
)

Serving O Fallon, MO and surrounding areas

Angi Approved

In business since 2009

Free estimates

Credit card accepted

"I purchased a house with an existing security system. JR came out and was able to tell me exactly what I needed to update the system. During the installation the guys walked me through how to work everything. Very happy I went with DST Security."
Response time2 days
Recommended by100%of homeowners
Avatar for Electronics 911
Electronics 911
5.0(
5
)

Serving O Fallon, MO and surrounding areas

Angi Approved

In business since 1993

Free estimates

Warranties offered

"The owner of Electronics 9-1-1 installed an eight-camera home security system in my home. The entire experience, from initial consultation to finished product, was the model on which all other advertisers' services on Homeadvisor should be based! The company owner's recommendations about installation techniques, technical knowledge and considerations, equipment capabilities, scheduling accommodations, and modifications in mid-installation to overcome unforeseen issues were all spot-on, and resulted in a system that exceeded every expectation. Would use Electronics 9-1-1 again in a heartbeat, and it is a pleasure to recommend them to anyone needing security system installation or service of the highest quality."
Response time2 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Mid Knight Fire and Security
5.0(
2
)

Serving O Fallon, MO and surrounding areas

Angi Approved

In business since 2023

Credit card accepted

Offers commercial services

"Midnight Fire and Security Systems are highly recommended. They demonstrated professionalism and expertise, conducting a thorough assessment and identifying critical areas for improvement within a reasonable price. The team showcased attention to detail, ensuring every connection was safe and efficient. They enhanced our home security and fire protection. Definitely will be my go to business for fire and security needs."
1 neighbors recently requested a quote
Avatar for Rest Smart Home Solutions LLC
Rest Smart Home Solutions LLC
5.0(
1
)

Serving O Fallon, MO and surrounding areas

Angi Approved

In business since 2020

Free estimates

Credit card accepted

"I canâ t thank Ryan enough for reinstalling my Ring camera! Very quick to respond and prompt service. Took the time to discuss my issue over the phone. Thank you so much!"
Ring Alarm Install
Former LEO
Free In Home Consultation
Response time10 mins
Recommended by100%of homeowners
FAQs for alarm or security system installation projects in O Fallon, MO

If you terminate your security system before your contract ends, you’ll likely have to pay a cancellation fee—often a percentage of the remaining contract balance. To avoid these fees, consider choosing a brand that offers contract-free plans, like SimpliSafe or Vivint. You can also negotiate with your provider to see if they provide pro-rated cancellation fees or special exceptions.

Paying for a security system is a valuable investment because it enhances your home’s safety and deters criminal activity. With millions of property crimes each year, having robust security measures helps protect your property and might even lower your insurance premiums. It's a worthwhile investment for lasting peace of mind.

The average cost to install security cameras ranges from $125 to $3,500, depending on the amount, type, and placement. To install a complete setup of four cameras, homeowners can expect to invest an average of $1,300 for labor and equipment. Installing multiple cameras gives you comprehensive coverage of vulnerable entry points and enhances overall property security.

The O Fallon, MO homeowners’ guide to alarm or security system installations

From average costs to expert advice, get all the answers you need to get your job done.

  • A hand controlling the electric wlndow blinds

    HomeAdvisor's Electric Blinds Cost Guide explores the price of electric blinds based on the power source and smart capabilities. Find out motorized blinds cost factors.

  • Hand pushing buttons on alarm system

    HomeAdvisor's Alarm and Security System Cost Guide gives you the price to fix your home security system. Find average maintenance costs and professional repair service rates.