Tri-State is located at 50 Nashua Road, Suite 209B in Londonderry. 

We are located in the Clock Tower Building at Londonderry Square. We are easily found by exiting route 93 at exit 4 and traveling west on Nashua Road.

We have added additional staff to serve you more efficiently, both in-office and in-the-field. We are presently partnered with analytical labs within Southern NH and are jointly committed to giving our customers the shortest turn around times on the air and water test results. Septic system testing and reporting will also be handled in the same timely manner.

We sincerely hope that the changes we’ve made will keep Tri-Sate at an uppermost service level and continue providing the highest quality home inspection services for you.