Home & Business Security Systems in St. Charles, MO
At Citywide Alarms, we have installed home alarm systems, business alarm systems, security cameras, access control, and smart home automation across St. Charles County since 2010.
Our Office in St. Charles
Home Security Specialists For St. Charles County
Citywide Alarms is a family-owned security company serving St. Charles and the surrounding area with home and business alarm systems, security cameras, access control, and smart home automation. We're based locally at 965 Sycamore Dr in St. Charles, MO, and our team handles everything from installation to ongoing monitoring and support. Ready to get started? Schedule your free estimate today.
A Local Leader In Home & Business Security
Home Alarms
Fully wireless alarm systems that detect intrusions the moment they happen and send an instant signal to our 24/7 monitoring center.
Learn MoreSecurity Cameras
HD indoor and outdoor cameras that let you check in on your home or business from anywhere, day or night, right from your phone.
Learn MoreSmart Home Devices
Control your video doorbell, smart locks, garage door, thermostat, and lights all from one app, fully integrated with your security system.
Learn MoreBusiness Alarms
Commercial-grade alarm systems built to protect your property, employees, and inventory around the clock, backed by our 24/7 monitoring center.
Learn MoreAccess Control
Keyless entry systems that let you control exactly who gets into your building and when, whether it's a single door or a full commercial property.
Learn MoreCloud Storage
Store your camera footage securely offsite, so it's protected and easy to pull up anytime, even if the camera itself is damaged or stolen.
Learn MoreFire Alarm Systems
Commercial fire detection and alarm systems installed to code, monitored around the clock to alert emergency responders the moment smoke or fire is detected.
Learn MoreMonitored Cameras
Live video verification lets our monitoring center see what's actually happening in real time, cutting down false alarms and getting a faster response when it's real.
Learn MoreWhy St. Charles Homeowners & Businesses Choose Citywide Alarms
Choosing a security company comes down to trust: will someone actually show up when something goes wrong, and will your system hold up when it matters? We've backed that up as a family-owned company since 2010, with an A+ BBB rating, 4.8+ stars across 100+ reviews, two Angie's List Super Service Awards, and recognition from KSDK Channel 5 as the #1 provider of video doorbells in St. Louis. Every system runs on Alarm.com and installs fully wireless, and we only service equipment we install ourselves, so you're never stuck explaining your setup to someone unfamiliar with it.
What St. Charles County Thinks Of Us
Frequently Asked Questions
How much does a home security system cost in St. Charles, MO?
It depends on the size of your home, the equipment you choose, and your monitoring plan. A small apartment setup costs less than a full home with cameras, access control, and smart automation. The most accurate way to get a number is a free consultation, where we walk your property and quote based on what you actually need instead of a generic package.
Do you offer smart home installation in St. Charles?
Yes. We install and integrate video doorbells, smart locks, garage door control, thermostats, and lighting, all controllable from a single app, alongside your alarm and camera system.
Is your team local to St. Charles?
Yes. We have a physical office at 965 Sycamore Dr in St. Charles, and our technicians live and work in the area. You’re not waiting on a crew driving in from out of state.
Do you provide security systems for homes and businesses?
Yes. We install and monitor systems for both, including alarms, security cameras, access control, smart home automation, and fire alarm systems.
Do you serve other cities in St. Charles County?
Yes. Citywide Alarms serves all of St. Charles County, including Cottleville, O’Fallon, Wentzville, and St. Peters, not just the City of St. Charles itself.
Proudly Serving St. Charles and Beyond
Citywide Alarms provides trusted security solutions throughout St. Charles County and surrounding communities. Whether you’re a home or a business, we’re ready to help you protect what matters most.
- St. Charles965 Sycamore Dr.
St. Charles, MO 63304
Contact Us For A Quote
If we didn’t answer all of your questions, feel free to contact us at anytime.