Jon E Koopman

Jon E Koopman is listed on BuildZoom at 127 Village St in Marblehead, with two permitted projects on the page. The licence lines are the substance of what is published. BuildZoom shows a Massachusetts construction supervisor licence, CS-070027, as active, and says it verified that in July 2026. On the same page it shows a Massachusetts home improvement contractor registration, #165157, as inactive, citing Consumer Affairs and Business Regulation showing it as at one point cancelled. Neither has been checked against the state registry here. A construction supervisor licence and a home improvement contractor registration are separate credentials, and these two lines describe them in different states. For residential work, that is the first question to put to him directly: is the home improvement registration current, what is the number, and then check it on the state's own site. BuildZoom lists kitchen, bathroom and basement remodels, whole-home remodels and additions among the services offered, which is that platform's standard category set rather than a description of the work he has done. With two permits published, ask for addresses and references from recent jobs so there is something concrete to look at.