Flagg Builders, LLC

Flagg Builders is a Haverhill, MA outfit co-owned by Keith and Glenn, built around kitchen and bathroom renovations and home additions. Homeowners keep coming back with the same kind of project: a full-gut bathroom or kitchen, a finished basement, or a room built essentially from scratch. The written record is short but unusually consistent: thirteen reviews dated 2019 through 2025 across six platforms, and every one is five stars. On Angi, a homeowner described a full finished-basement build last summer -- a living room, game area, gym and bathroom -- with Keith matching custom trim and materials to a colonial the family had built four years earlier, down to sourcing from the same supplier. Another 2025 review credits Keith with a custom built-in, board-and-batten trim, an accent wall and basement stairwell molding, calling the craftsmanship 'flawless.' A third describes a kitchen-and-bathroom remodel that stayed within its estimate and included a new deck built to match an existing one. A common thread across the reviews is Keith's own hands-on presence -- helping pick tile, walking through options, staying responsive to questions -- rather than a crew working unsupervised. One 2025 review described a project completed under budget on a flexible schedule during the pandemic, spanning two bathrooms, a kitchen, living room, staircase and three bedrooms built essentially from scratch. A single older review, from 2019, praised the same responsiveness and attention to detail on a bathroom remodel, suggesting the pattern isn't new. The company's Massachusetts home improvement contractor registration is verified active with the state. BuildZoom separately lists Keith Flagg's construction supervisor and home improvement contractor licenses as active, with 11 permitted projects on file and a BuildZoom score in the 73rd percentile of Massachusetts contractors. There isn't much to flag before calling -- the written record is thin in volume but carries no complaints, disputes, or negative mentions anywhere in it. What's worth asking about is scope and timeline: several reviews describe large, multi-room projects, so a homeowner with a smaller job should confirm how Flagg Builders scales down and what a typical schedule looks like. For a full kitchen or bathroom remodel, a basement build-out, or an addition where matching existing finish work matters, Flagg Builders' reviews suggest a contractor who does the detail work personally. Worth confirming: current scheduling and how a project of your size compares to the larger remodels the reviews describe.