Expect a design phase with measurements, a layout drawing, and fixture choices, followed by demolition down to the studs. In Hull's older houses, opening walls often reveals framing that was altered over the years, and the remodeler may need to reinforce floors for a heavy tub or a large tiled shower.
The building permit goes to the Building Department by mail, drop box, or in person, and the fire prevention office looks at construction plans alongside that department. Plumbing and electrical permits are filed online, and the part-time plumbing and wiring inspectors are scheduled by phone, so ask for a written schedule that leaves room for inspections.
Near the end, the crew sets tile, glass, vanities, and fixtures, and the electrician finishes lighting and fan controls. Walk the finished room with the remodeler and make a punch list before the last payment.