At the heart of the meeting was a proposal by Ted Barkerhook, the chair, to adjust the ADU size limits. The suggested change would not only increase the size from the current cap of 900 square feet to 1,200 square feet by right but also eliminate the existing regulation that restricts ADU dimensions to 50% of the primary residence’s gross floor area. Barkerhook argued that these changes could enhance affordable housing options, provide financial benefits to homeowners, and support different family dynamics by allowing children or parents to live independently yet nearby.

The chair noted that while most neighboring towns maintain the 900-square-foot limit, the proposal was partly inspired by Westboro, which permits ADUs of up to 1,000 square feet. He highlighted the absence of short-term rental regulations in Hopkinton, contrasting it with neighboring towns, and expressed a need for the committee to review this aspect in future discussions.

Committee members debated the economic implications of the proposal, considering potential impacts on neighborhood dynamics and housing supply. One speaker articulated that increasing the supply of homes, including ADUs, could lead to lower prices, making housing more attainable for first-time buyers and beneficial for empty nesters. This viewpoint was juxtaposed with concerns that larger ADUs might alter neighborhood character and frustrate existing homeowners who had different expectations when purchasing their properties.

The discussion also delved into the structural nature of ADUs, whether they should remain attached to primary residences or be allowed as standalone structures. The recent state law change, removing the requirement for ADUs to be attached, was acknowledged. Safety concerns, including fire hazards and setbacks, were noted as critical elements to address in any permitting process.

The topic of short-term rentals arose, with some members expressing concerns about increased parking demands and neighborhood integrity if larger ADUs were used as short-term rental properties. The committee agreed to table the short-term rental discussion for a later date, acknowledging its relevance but focusing on ADU size for the current meeting.

The conversation further explored the potential for building larger ADUs, with historical context provided on how special permits had previously allowed for larger units. Questions about the flexibility of current zoning bylaws and the potential need for special permits for units exceeding 900 square feet led to a broader discussion on zoning language and its interpretation. The necessity of seeking legal counsel to ensure regulatory compliance was recognized.

In addition to ADU regulations, the committee addressed the town’s compliance with Massachusetts Bay Transportation Authority (MBTA) zoning requirements. The committee discussed potential solutions, such as expanding existing districts or creating new ones, with a deadline of May 2026 to meet state standards. The intricacies of zoning bylaw adjustments were emphasized as the town navigates state mandates alongside local needs.