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Cornerstone Security Group, LLC

Quick service. Fair prices. Personal relationships with our customers.

For more than 20 years, property owners throughout Southeast Wisconsin and around the state have trusted Cornerstone Security Group, LLC to install high-quality security systems at an affordable price. We'd like to do the
same for you. 


As a locally owned, family operated company, we take great pride in our team of fast, friendly, specially trained security technicians and sales consultants who can often provide same-day service. As a Cornerstone Security Group, LLC customer you can expect:


  • Experience, support and the most advanced technology available
  • Customized security solutions

  • The ability to detect the intruder before entry

  • Ownership of all equipment

  • 2-year parts and labor warranty


Learn more about our stress-free security systems customized to fit your needs. Call 414-607-6990 for a NO cost, NO obligation security analysis.

Safety Tip

Lock up!  Spring and summer mean more time spent outside but don't forget to lock your front door when you're not in the house.


Plan on working in the backyard or popping over to visit a neighbor? Lock your door when you're out.


Airing out your house during spring-cleaning? Be sure to lock your windows when you close them, especially any on the main floor.


Most break-ins occur through unlocked doors or windows!

Stay Connected

Angie's List


Life is busy. Whether you are running between work and school, have a day full of errands or are out of town, the last thing you need is a security system that causes stress. Relax ... Cornerstone Security Group, LLC has you covered.


Working together, we will help you customize an affordable security system to manage your busy lifestyle and keep your home and family safe. Not only are our systems easy to use and reliable, they have the ability to detect an intruder BEFORE entry into your home and help you alert the authorities right away.


For home security without worry, trust Cornerstone Security Group, LLC.

Independant Living Solutions

Personal monitored systems are also available through Cornerstone Security Group, LLC. Learn More >



Protect your business from costly losses due to theft, vandalism and other dangers with a customized commercial security system from Cornerstone Security Group, LLC. We will work with you to determine the best options to meet your needs and fit your budget.


Whether you are a small company or run a larger operation, Cornerstone Security Group, LLC can provide you with systems for:

  • Intrusion Detection

  • Video Surveillance

  • Access Control 

  • Lone-worker Protection

  • And more

At Cornerstone Security Group, LLC our business is protecting yours.



As a non-profit organization, your time should be dedicated to fulfilling your mission and serving those who can benefit from your help, not worrying about the safety and security of your events, activities and projects.

Cornerstone Security Group, LLC is proud to help local non-profit groups protect their hard work and interests with affordable security systems for:

  • Community Construction Projects

  • Neighborhood Reclamation Initiatives 

  • Pop-up Shops for Fundraising

  • Other Humanitarian and Philanthropic Activities

Let us help add an extra layer of security and success to your outreach.


Contact Us

7251 W. North Ave., Wauwatosa, WI 53213 USA


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