Chelsea, MA Home Business: Zoning & Home Occupation Permits (2026)

Chelsea zones home-based work through Sec. 34-50(f)(1), part of the accessory-uses article that lists what is permitted alongside a principal residential use in the R1, R2 and NHR districts. A home occupation or professional office is allowed only when it is conducted within and incidental to a principal building used for living purposes, and the ordinance sets seven conditions that must all be met. The business cannot change the residential character of the building or neighborhood. It must be operated by a resident of the building, and the household may employ no more than one person beyond the resident-operator.

The space devoted to the occupation cannot exceed 25 percent of the habitable space, a term the ordinance ties to the state building code's definition. No materials or equipment may be stored outside the building, and there can be no display of signs or products visible from the street, a separate restriction covered in the companion signage record for this business type. Only one home occupation is allowed per dwelling unit, so a household cannot stack two separate home businesses in the same unit even if each individually complies.

Finally, the ordinance bars any retail sale of merchandise on the premises, which keeps a home occupation limited to office, service or professional work rather than a storefront. Because a home occupation is classified as an accessory use, it also falls under Sec. 34-50(a)'s general rule that accessory uses cannot significantly alter the character of the premises, and under Sec. 34-50(b)'s 25 percent floor-area cap for non-garage accessory uses within a building. A related provision, Sec. 34-50(f)(7), separately allows a delivery-only marijuana establishment as a home-based accessory use in residential districts if it meets the same home-occupation conditions and stores no product on site.