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Learn about our screening process

100% Recommended

31 Years In Business

Company Details

  • Verified Licenses


  • Mon: Open 24 Hours
  • Tue: Open 24 Hours
  • Wed: Open 24 Hours
  • Thu: Open 24 Hours
  • Fri: Open 24 Hours
  • Sat: Open 24 Hours
  • Sun: Open 24 Hours
View All Details & Credentials


Service Details

  • Residential Work
  • Commercial Work
  • Small Jobs Welcome

Areas of Expertise

  • Burglar and Fire Alarm Systems
  • Video Surveillance Cameras
  • Home Theater and Surround Sound Systems
  • Ethernet Network Wiring
  • Flat Screen TV installations
View All Offerings and Cities Served

Cost Information

  • Free Estimates


11 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-10 of 11 reviews Showing 0 reviews
5.0 Katherine E. Northport, NY

He was very trice and did a wonderful job! He cleaned up everything. I would contact him again!!

5.0 Barry R. Lake Grove, NY

Quality work, on time, reasonable priced.

5.0 Karnik M. Little Neck, NY

Very professional, provides alternatives based on recommendations. Always willing to provide a solution.

5.0 Amina S. Commack, NY

He was diligent and helpful, came in the same day and finished the job in 2 hours. We are extremely pleased with his services.

5.0 Drew P. Hauppauge, NY

I needed someone to hang a new large screen TV, secure some updated components for the surround sound and connect it all to the new TV. John from Harrison Alarms responded promptly, gave me a fair quote, didn t bump up the quote when he ran into a few installation snags and did a very thorough and clean job throughout. He secured a few of the components for me at competitive prices and all in all it was pleasant and friendly experience. I would use him again for any similar projects.

5.0 Megan R. Huntington, NY

John went above and beyond and made sure everything was perfect! I would 100% recommend him to anyone. He explained everything he did and showed me how to work the TV as well!!

5.0 Louise S. East Northport, NY

Great guy, terrific personality, honest, Iâ ll keep on using him

5.0 Patrick F. Deer Park, NY

Very knowledgeable professional when he s done he makes sure area is very clean

5.0 Stacey R. Commack, NY

He also put up a tv in the house and all wires were hidden out of site. He did an excellent job with the alarm system too.

5.0 Charlie M. East Islip, NY

Harrison Alarms came in and took over for our prior company. He set us up for radio monitoring and fixed our entire system. While talking with the owner we were discussing television installations and we had them install a flat screen television for us as well. Pricing, quality and service are all excellent.

Showing 1-10 of 11 results Showing 0 of 0 results
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Harrison Alarms, Inc.
Custom TV Installations
Surround Sound Speakers
Surveillance Cameras
Residential Alarm

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information representations set forth in those profiles as they are self-reported by the Service Professional.

HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.
To find more licensing information for your state, visit our Licensing Requirements page.

Seal of Approval

What is the screening process that Service Professionals go through in order to become members of the HomeAdvisor network?

  1. Verify Trade License
    HomeAdvisor checks to see if the business carries the appropriate state-level license.
  2. Verify Insurance
    As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services.
  3. Verification of State Business Filings
    For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located.
  4. Criminal Records Search
    HomeAdvisor uses 3rd party data sources to conduct a criminal search for any relevant criminal activity associated with the owner/principal of the business.
  5. Sex Offender Search
    We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located.
  6. Bankruptcy Search
    We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them.
  7. Legal Search for Civil Judgments
    We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them.
  8. Liens Search
    We use 3rd party data sources to check the principal/owner of the business for liens placed against them.
  9. Identity Verification (SSN)
    HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities.
  10. Identity Verification (Reverse Phone Lookup)
    We conduct a reverse business phone lookup to identify records matching the phone number information provided by the business.

NOTE: Member service professional information confirmed as described above may change or expire over time; while HomeAdvisor attempts to maintain accurate and up-to-date information, and confirms changes when notified, we cannot guarantee that profile and screening information is accurate. Therefore, we recommend that before working with a service professional you verify that information presented is still current and/or acceptable to you.
Please see HomeAdvisor's Terms and Conditions for a full description of how we screen Service Professionals

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