Methuen, MA Accessory Structures: ADU Rules (2026)

Methuen's accessory apartment rule is Article V, § 5.7 of the Comprehensive Zoning Ordinance. It allows the conversion, renovation or addition of not more than 700 square feet in an existing dwelling or on original construction, for use as a separate, non-income-producing housekeeping unit for a member of the family, in all districts. Section 2.2 defines ACCESSORY APARTMENT the same way and sends readers to § 5.7.

The owner must occupy at least one of the dwelling units as a permanent legal residence except for bona fide temporary absences. A notarized affidavit from the owner must verify that the dwelling is owner-occupied and that the occupant of the accessory apartment is a family member. Not more than one accessory apartment can be established in a principal dwelling.

Design rules: the apartment shall not have separate utilities, and the building must keep its original appearance. Access is through an interior doorway, and any new entrance the Building Official requires for safety goes on the side or rear of the dwelling. Off-street parking follows the residential parking requirements of the ordinance.

A restrictive covenant must be recorded in the Registry of Deeds stating that the right to maintain an accessory apartment in no way constitutes approval of an additional dwelling unit, and a copy is filed with the Building Department.

The permit is not permanent. Section 5.7(G) calls it a temporary exemption, not a guaranteed right, renewable yearly, with a reinspection each renewal period and an annual fee of $50 per inspection. If the permit is not renewed, the second kitchen must be removed and free access created throughout the dwelling. On a sale or change of occupant, the permit may be transferred if the legal documentation is submitted within 90 days, with a reinspection and the $50 fee. Because the apartment is limited to a family member, rental to unrelated tenants is outside what § 5.7 allows.