Sentry Real Estate was established in 1971 by Pete Gutterman, and in 1980 he opened an office in Manchester. This branch has 18 agents that serve both Hartford and Tolland counties. The agents at this office focus mainly on residential and small commercial offices but are able to handle larger commercial spaces upon request. Sentry Real Estate has offices in Vernon, Windsor and Hartford that all supply a statewide Multiple Listing System with IDX property search.