Welcome Home To Peace of Mind

Protecting what you love is our 1st priority.


We Know Business Security

For over 50 years, businesses
have trusted us to get the job done.


We are ABSOLUTEly thrilled to be United!

United Systems has acquired Absolute Fire & Safety & has launched United Systems Fire & Safety.


Smarter Mobile Control

Control your home or business like never before.


Denver Security Systems
for Home & Business

We are United Security Systems & we've brought peace of mind
to thousands of Coloradans for over 50 years.

Home Security Systems & Solutions

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Business Security Systems & Solutions

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Property Crimes Per Day In Colorado
Average Loss Per Burglary
People Who Want Less Stress
Days of Peace of Mind with Us

Why Choose United Security Systems?

Solid security solutions in Denver & the Front Range, reliability and value.


For over 50 years, United Security Systems’ sole focus has been to provide residential and commercial security services to thousands of Coloradans. Home & Business security is what we do!

Our Team

Our employees have an average of 11 years in the security industry.  Our ongoing training keeps us ahead of the curve in the areas of home and business alarm system & security cameras.

Best Security Technology

No matter what you’re looking for, whether it’s a business security system or home security cameras, we recommend and provide the best security systems for your needs; reliable, cutting edge & yet simple to use.


We thoroughly assess your Colorado business and home security needs.  We design your security systems & security solutions with your unique needs in mind – starting with a complimentary consultation.

We’re Local

Since 1957, we’ve made Denver, Colorado our home & to us, you’re more than a client number, you’re our neighbor.

Personal Service

As home security systems and business security specialists, you can always count on us to deliver the personal attention and care you deserve.

Security System Monitoring

Our monitoring solution for home and business security systems include the nation’s largest network of UL certified monitoring centers so you get local customer service plus industry leading response time and unmatched technology so your alarm is monitored 24/7 no matter what.


We don’t just sell you a security system, cameras, access control or smart control system and walk away. We service all types of home security equipment & provide a warranty on our work.

Don’t take our word for it.

See what our clients are saying about us:

Thank you for 17 years of professional service. The personnel at United Security Systems have always been courteous & helpful.

Margate M

Thanks to United Security Systems, I may be able to start watching scary movies again knowing the bogey man won't be sneaking through my window later that night!

Emily T

Customer service at its best! I couldn't have been more pleased with the support provided to us.

Debbie G

I wanted to thank you and your team for the installation at our new facility. Everything is going just great, thank you all for doing such a professional and seamless job of getting us moved.

Bill Y

You have been extremely helpful and responsive throughout this process of getting our alarm installed. We really appreciate your quick response and talking through the options with us.

Jen J

After living in our home for 27 years, this move has been exhausting and, at times, mind-boggling but you made the security systems aspect that much easier!

Mary F