Salem home renovation across four centuries of houses

Salem's demolition ordinance covers buildings 50 years or older and counts removing or enclosing half the exterior walls, half the street-facing walls or half the roof structure, added up over five years, as demolition. If the Historical Commission votes to preserve a house, permits are held 12 months for buildings 50 to 99 years old and 18 months for older ones, and no building permit for the site issues in that time. We size additions and rear rebuilds with that line in mind from the first sketch.

In the McIntire, Derby Street, Lafayette Street and Washington Square districts, exterior changes need Historical Commission approval before the building permit. Windows, doors, trim, roofing and porches are where questions come up, so we work the Commission's meeting schedule into the timeline and confirm the right application with staff before ordering anything. See our historic district guide.

Salem's Coastal Resiliency Overlay follows the state's projection of a 100-year storm in 2070. Inside it, new homes, and expansions that add a dwelling unit (ADUs count), must keep living space, mechanicals and electrical service above a sea-level-rise flood elevation. Changes to an existing building of five or fewer units are exempt unless they add a unit or expand structural lot coverage past the overlay's limit; ask the Building Commissioner how that limit is applied. Near Collins Cove, the Willows and the other low shorelines we check the city's C-ROD viewer and the July 2025 FEMA maps before design.

Salem's 2022 wetlands ordinance sets a 25-foot no-disturbance zone and a 50-foot mitigation zone inside the 100-foot buffer, and protects isolated wetlands of 750 square feet or more along with vernal pools. Near the harbor and the rivers, that decides where an addition, a patio or a staging area can go.

Salem has been on the Specialized Energy Code since July 1, 2024. The city says additions and alterations follow the Stretch Code with nothing extra. New buildings that burn fossil fuel need electric pre-wiring and at least 4 kW of solar per dwelling unit, while all-electric new homes have no requirements beyond the Stretch Code. More in our stretch code guide.

Salem rewrote its ADU ordinance on May 22, 2025: one ADU per lot by right where the use table allows it, up to 900 square feet or half the house, with no parking or owner-occupancy requirement. Short-term rentals are banned in both units. A detached unit must keep 5 feet from side and rear lot lines and 10 feet from other buildings, and one that is not owner-occupied needs its own utility service. On a nonconforming lot the Zoning Board may need to make a finding first.