We provide professional expertise for all your residential or commercial pest control
needs in NH, Including Southern NH, Seacoast NH, and Northern MA.


We provide commercial pest control at restaurants, daycare facilities, apartment complexes, hospitality industry, retail/ office spaces, and manufacturing facilities.


We provide residential pest control for home pest protection, mosquito and tick control, mice and rats, ants and crawling bugs, spiders and beetles, wasps and hornets, termite control and bed bug control.

As a small, family owned business we consider integrity the cornerstone in all we do. We provide our customers with the finest applications of high quality materials at generous rates. Always giving our customers more than they paid for and never less.

We were started in 2018 with one part time technician as Assurance Pest Control. Then, due to demand driven growth, we became Cornerstone Pest Control in 2020 with multiple techs servicing Northern Massachusetts and Southern New Hampshire. We are one of the areas best pest control services at a reasonable price.

Residential mosquito treatment for a home in Southern NH

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For estimates or questions about our services, please contact us at your convenience. We look forward to talking with you soon!

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5.0 ★★★★★ Cornerstone Pest Control LCC


Great service!

– David & Karen Goldberg


Josh was super-knowledgeable, responsive & courteous!

– David Corey


Josh is the best. Genuinely cares about the service he provides. Thorough, reliable and professional. I couldn’t be more satisfied with the commitment to quality service from him and this company.

– Margaret Bishop


Once again my house feels very safe after careful inspection by Josh H. We got the mice problem GONE!!!!!

– Kathy Peterson


Very professional and through, explained everything he was doing.

– Paul Melanson


Awesome detailed explanations and enthusiastic to answer my questions. This included the original consolation and the day of the service. I really felt like I was being ‘taken care of’ and trusted that I picked the right company to handle my problem. He also went out of his way to put my worries at ease regarding termites which can be the scariest pest to deal with as a homeowner. I will definitely be a repeat customer!

– Nicole Belanger


Josh gave our home a thorough inspection and freshened bait as needed. This was all done with good cheer and thoughtful analysis. Well done. Please give him a raise.

– Michael Lohmeier


Hey Josh! I’m sorry I thought I heard the door. We appreciate you so much! I hope you are doing well.

– Dustin Pritchett


Josh is friendly, professional & thorough. We highly recommend him & Cornerstone!

– Louise Tunnell


Josh always does a great job. It was short notice and still he got the spraying done before Greek Easter. Thank you! Also thanks to the office staff for helping make this happen!!!

– Ann Routos


Both technicians were thorough and fulfilled my questions and concerns.

– Paul Asloglou


Both techs were thorough and met all my concerns!!

– Paul Asloglou


Josh explained what he was going to do. He was wonderful and knew what he was talking about.

– Irene Hathaway


very informative, answered all my questions and very pleasant.

– Claudia Landers


Excellent service and very thorough regarding what he was going to do. Very happy with the service.

– Jeff Burgess