Post Alarm Systems

Post Alarm Systems Family-owned since 1956. Trusted security solutions in Southern California for 3 generations. Locally operated. Protection Your Way.

Founded in 1956 by retired police chief Sam Post, Post Alarm has been a trusted name in Southern California for home security and commercial security for three generations. With an approach that blends local expertise with leading technology, we deliver best-in-class security solutions including burglar alarm monitoring, video surveillance, live video monitoring, patrol and armed response services

, fire alarm monitoring, and more. We pride ourselves on delivering customized security solutions, professional installation and service, and exceptional customer service. Contact us to experience the difference that nearly 70 years of security company expertise can make for you peace of mind. Trust Post Alarm to protect what matters most to you.

True home security isn't one lock or one camera; it's a system that works together from the street in.A layered security...
05/27/2026

True home security isn't one lock or one camera; it's a system that works together from the street in.

A layered security approach means threats are detected earlier, deterred sooner, and stopped before they reach your door.
From a well-lit exterior to smart locks at your entry points to sensors and monitoring inside, every layer plays a role.

Not sure where your home's vulnerabilities are? Our security experts can walk you through a custom assessment and build a plan that fits your home and your family. Get your free security quote by calling us at (800) 654-7678!

Happy   Weekend! 🇺🇸 Keep these tips in mind and go enjoy that BBQ; we'll keep an eye on things while you're gone.
05/21/2026

Happy Weekend! 🇺🇸 Keep these tips in mind and go enjoy that BBQ; we'll keep an eye on things while you're gone.

This is what a promise kept looks like.For over 70 years and three generations, Post Alarm has made one commitment: to t...
05/18/2026

This is what a promise kept looks like.

For over 70 years and three generations, Post Alarm has made one commitment: to treat every client like family. Not a number, not a contract.

Your home deserves that same promise. Get protected today by calling us at (800) 654-7678.

LA crime is rising. And it's hitting closer to home than most people realize.   is seeing a significant rise in property...
05/14/2026

LA crime is rising. And it's hitting closer to home than most people realize. is seeing a significant rise in property crime, and burglars are getting bolder and harder to stop after the fact. The difference between a close call and a break-in is often just one thing: whether someone was watching.

With Post Alarm Night Shield, someone always is. We've protected this community for over 70 years. Don't wait for something to happen: review your coverage today. Call us at (800) 654-7678!

On May 8th, two masked suspects broke into a   home just after noon while the homeowners were away. Their cameras caught...
05/13/2026

On May 8th, two masked suspects broke into a home just after noon while the homeowners were away. Their cameras caught everything. A neighbor who stepped outside to help was attacked with bear spray. Police arrived over an hour after the call. No arrests have been made, and it's part of a growing string of burglaries targeting homes across the San Fernando Valley.

An hour is too long to wait. When it comes to patrol and alarm monitoring, having it all under one provider isn't a luxury; it's what makes the difference in response time. Post Alarm's integrated monitoring and patrol are built for exactly this. Our patrol officers provide armed response and work directly alongside local law enforcement, because when every second matters, your security team should already be on the way.

Read the full story via KTLA 5 News here: https://ktla.com/news/local-news/daylight-studio-city-burglary-suspects/

 , we're coming to you! đź‘‹Heading into summer, we're seeing more activity across LA neighborhoods. The homes that stay sa...
05/12/2026

, we're coming to you! đź‘‹

Heading into summer, we're seeing more activity across LA neighborhoods. The homes that stay safer aren't just the ones with the best tech; they're the ones where neighbors are prepared and paying attention.

On May 16th at , we're bringing that conversation to you. Come hang, meet the team, and walk away with real tools you can actually use. Bring a neighbor, bring your questions — it's free and open to the whole community. We hope to see you there!

That patrol car you see in your neighborhood? It’s more than a presence; it’s an added layer of protection.Post Alarm’s ...
05/08/2026

That patrol car you see in your neighborhood? It’s more than a presence; it’s an added layer of protection.

Post Alarm’s armed patrol services provide a visible deterrent and rapid, local response when it matters most. When an alarm is triggered, our monitoring team verifies the event and dispatches trained officers to respond quickly and effectively.

Here’s what that looks like in practice:
✔️ Visible patrol presence helps deter criminal activity in your community
✔️ Alarm events are verified by our local monitoring team
✔️ Trained officers are dispatched immediately when needed
✔️ Coordinated response improves speed and accuracy in the field

Paired with Night Shield®, that response becomes even more proactive. With event-based live video monitoring and real-time verification by our trained agents, potential threats can be identified earlier, enabling earlier dispatch and faster intervention.

When monitoring and response are handled by separate security providers, handoffs can introduce delays, sometimes adding 5–7 minutes before the right information reaches the right team. With a coordinated system, communication is direct, streamlined, and faster.

Call us today for a free consultation: (800) 654-7678!
https://postalarm.com/services/patrol-service/

A   Valley burglary crew didn't just hit one home last week; they returned hours later to steal the truck out of the dri...
05/06/2026

A Valley burglary crew didn't just hit one home last week; they returned hours later to steal the truck out of the driveway.

Repeat targeting like this is becoming more common across LA neighborhoods. Burglars are patient, and a single camera or alarm isn't always enough to deter a second attempt.

Post Alarm was built for exactly this kind of threat — multiple layers of protection working together so your home stays secure. See why layered security works — and how Post Alarm puts every piece in place. https://postalarm.com/contact-us/

Residents in parts of the San Fernando Valley are on edge after a string of burglaries, including one in West Hills where suspects returned to the same home hours later and successfully stole a vehicle.

https://ktla.com/news/local-news/burglars-target-san-fernando-valley-homes-return-hours-later-to-steal-truck/

A $40 device. 30 minutes to build. And your entire home security system goes dark.  burglaries are becoming a go-to tact...
05/01/2026

A $40 device. 30 minutes to build. And your entire home security system goes dark.

burglaries are becoming a go-to tactic for thieves across , and the scary part? This technology is shockingly easy to get. Anyone can order a jammer online, and your wireless cameras are powerless against it.

In a story by Yahoo Finance , one LA family found out the hard way: $25,000 in valuables gone, zero footage, zero leads. The solution isn't more cameras. It's smarter protection. Live video monitoring and early detection mean a real person is watching and responding, even when your WiFi can't.

Don't wait until it happens to your family. Call us today at (800) 654-7678 and get a free security assessment before it's too late.

Read the full story here: https://tinyurl.com/4cxywu6b

Make sure your landscaping isn't working against you! Most homeowners don't realize that overgrown hedges, poor lighting...
04/28/2026

Make sure your landscaping isn't working against you!

Most homeowners don't realize that overgrown hedges, poor lighting, and hidden entryways can actually make your home more of a target for burglars. This spring, as you plan your yard projects, keep home security in mind with these tips:

✅ Keep hedges under 3 feet and tree canopies above 8 feet near windows and entryways — eliminate hiding spots before they become a problem.
âś… Add motion-sensing lights so anyone approaching knows they've been noticed.
âś… Stay on top of yard maintenance. A tidy, cared-for property tells the world someone is home and paying attention.

A great alarm system is just the start; the safest homes make it hard for threats to get close in the first place.

Don't let your yard be an open invitation for burglars 🏡🔒Burglars are counting on you to forget about your tool shed, sl...
04/25/2026

Don't let your yard be an open invitation for burglars 🏡🔒

Burglars are counting on you to forget about your tool shed, sliding glass doors, ground-level windows, backyard gates, and yes, even your dog door. Most of these fixes take less than 5 minutes. Lock up all entry points and be mindful of what you leave visible. When you're ready for the rest, we're here to help.

Address

47 East Saint Joseph Street
Arcadia, CA
91006

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

8006547678

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