The developer behind Heirloom Flats apartments has been given the green light to build a new 150-unit residential building in Bloomfield’s town center. The Bloomfield Town Plan and Zoning Commission voted unanimously last month to approve plans from Paul Butler, a Hartford County-based developer, to build the four-story structure at 25 Jerome Avenue. The property will include 214 parking spaces, but will not feature any on-street parking. The aging sidewalk running along Jerome Avenue will also be rebuilt as part of the project. It is unclear when work at the site will begin. Representatives for the company did not provide a timeline for the construction. The project is the latest phase of a larger initiative by Butler to construct a series of apartment buildings in Bloomfield’s sparsely populated town center.