(888) 708-5899

Trusted New Hampshire Security Company

Home and business owners in New Hampshire face several security issues and threats for their property. Reliable security systems will keep your home, family, tenants, or, business completely safe and protected.

JCSN Systems LLC is a trusted security company, serving Manchester, Concord, Portsmouth, and all of Southern New Hampshire. We provide system installation, maintenance and repair for alarm systems, surveillance, access control and intercom systems for homes and businesses. Independently and locally owned and operated, JCSN is a security company that takes pride in customized service, human connection, and quality workmanship.

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New Hampshire home and commercial security

10+ Years of Providing Residential & Commercial Security Systems in New Hampshire

We provide durable and effective security systems to New Hampshire homeowners, multi-tenant properties, and businesses of all sizes. Honesty, transparency, efficiency and competency guide and motivate us to deliver the highest quality of customer service to keep you, your loved ones and your possessions safe and secure.

Why We’re Different

JCSN has built a reputation of mutual trust with our clientele. Our security services are rendered on the following foundational principles:

Custom Security System Design

We realizes not all customers have the same requirements. Understanding your distinct security needs for your family, building, business, or organization enables us to customize our products. We make sure the security system you need is the one you get for your New Hampshire property.

A Human Touch

Giving our customers the ability to reach us at any moment truly matters. We guarantee direct access to our security company for any reason – whether addressing concerns, sharing feedback, or simply offering peace of mind. Every call we receive is an important one, and we value personal connection with our New Hampshire customers.

Quality Workmanship

At JCSN Systems we stand behind our security products and our services. Our team doesn’t cut corners or take shortcuts that lead to unfavorable outcomes. We pride ourselves on these standards and find that most of our New Hampshire-based customers retain our services despite no long term contract requirements.

Security Services

For over 10 years, JCSN has provided residential ad commercial security systems to help keep our customers’ homes, businesses and buildings protected at all times. Security systems can vary in complexity and features, and the right solution depends on your specific requirements. Our company provides installation, maintenance, and repairs for the following home security systems for New Hampshire home and business owners.

Burglar Alarms

A reliable burglar alarms scare off intruders and alert those necessary for a break-in. We can install high-quality burglar alarm systems as an upgrade or replacement. If you’re experiencing issues with your current alarm, our security team can repair bad wiring and test faulty parts at your home or business.

Surveillance Systems

Surveillance systems allow New Hampshire-based homeowners and businesses to stay protect from intruders. Our security team provides surveillance system installation, maintenance, and repairs. Our experienced team can help you find the best systems with the features that meet your security requirements. 

Fire Alarms

It’s important to smoke and fire alarms tested to ensure they work! Our team provides professional installation, replacement, and repair of fire alarms for homes, businesses, and multi-unit buildings in New Hampshire.


Our team of reliable security professionals provides real-time monitoring services and 24/7 alarm monitoring for homes and businesses.

New Hampshire Security Solutions

Security from Manchester to Portsmouth, and All of Southern NH

We provide commercial and residential security for New Hampshire, including the following cities and towns:

  • Manchester
  • Concord
  • Portsmouth
  • Nashua
  • Dover
  • Rochester
  • Exeter
  • Salem
  • Tilton
  • Laconia

Satisfied Customers..

“I was contacted quickly by Jim, the owner. We had an alarm system, but were interested in something with wi-fi capability so we could monitor and control the system remotely. He described the options, and I was happy with his suggestions and the cost. He did the installation within a couple of days, and everything went perfect. In the process of testing some of our original equipment, Jim discovered that two of our critical zones weren’t working at all. Jim’s cost on the monitoring was also a significant savings over what our previous alarm company was proposing. I would highly recommend Jim.”

-MM, Manchester, New Hampshire


Get a Free Estimate 

From Portsmouth to Manchester, JCSN Systems provides security services to Southern New Hampshire home and business owners, keeping them completely safe and protected. For a free estimate, call (888) 708-5899 or fill out the form below.

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Get Peace of Mind

JCSN Systems provides Surveillance, Intercom, Access Control, Security and Monitoring services across Massachusetts and New Hampshire.