Planning board backs changes to ADU and secondary-dwelling rules, with caveats

The planning board voted to forward Article 51, proposed edits to the zoning use chart and dwelling definitions that would fold garage-apartment language into a reworked secondary-dwelling and ADU framework and remove some legacy terms. Staff explained the objective is to simplify definitions and avoid dual terms that create interpretation risk; the proposed changes also exempt community land trust-owned properties from common-ownership requirements and set density limits drawn from the prior tertiary bylaw.

Board members pressed on several specifics: one member recommended retaining a 150% size cap for garage apartments to preserve a historical pattern of small accessory dwellings; others warned that allowing attached second dwellings could produce larger attached secondaries than currently intended. Staff said the HDC review and existing massing controls remain in place and that protected-use ADUs still impose size and occupancy thresholds; the board requested clearer decision language and recommended that staff draft exact phrasing to ensure garage apartments and attached second-dwellings are treated as intended.

After public comment—several residents supported cleaning up the code—the board closed the hearing and recommended Article 51 go forward to town meeting with the staff clarifications requested by board members.