Plymouth planning board advances housing-element work, debates six-unit cap, ADUs and short-term rentals

The Plymouth Planning Board continued work on the town's housing element at a meeting where consultant Judy urged the board to weigh zoning tools, infrastructure and community values as it revises the master plan.

"A master plan is a plan for the physical evolution of your town," Judy told members, explaining the housing chapter's role in aligning vision, land-use and implementation. She said the update will rely on assessor and Census data, targeted mapping, and permit-trend analysis rather than a standalone needs study.

Board members raised multiple concerns that the update must address. Several members said housing and property taxes feel unaffordable to residents and noted the town's high share of non-taxable property. One member summarized a recurring theme: "we have properties that have been gifted or sold to nonprofits," which some residents say reduces the local tax base; other members cautioned that nonprofits also provide services and downtown activity.

A major technical debate centered on the town's six-unit-per-building cap for multifamily housing. Judy said the constraint may be less the six-unit limit than the way density and lot requirements are written.

"If you want more multi-unit housing, the real question may be how many units per acre you allow," she said, suggesting options such as allowing multiple six-unit buildings on a lot or adjusting units-per-acre standards to preserve the six-unit building scale while improving project economics.

Members were split over downtown housing. Some opposed ground-floor residential or taller buildings that would alter downtown character; others supported mixed-use with apartments above commercial space and modestly higher height limits to make projects practical.

Short-term rentals and accessory-dwelling units (ADUs) drew sustained attention. The board discussed that Plymouth currently requires owner-occupancy for ADUs and that removing that requirement could increase the rental stock but might also be conflated with short-term rental concerns. Judy and members noted that courts have required precise zoning language where towns regulate transient or short-term use.

The university's changing student population also came up: members asked whether dorm conversions to non-student housing would remain exempt institutional uses and how such conversions might affect zoning, school impacts and tax status.

Implementation questions surfaced: who will lead action items, whether the town has water and sewer capacity to support development in proposed opportunity areas (fairgrounds road, Tenny Mountain, North Main) and how developer-built roads and utilities should be handled if the town later is asked to assume maintenance.

Judy said a community survey tied to the HOP 2.0 grant will be released next month and asked the board to propose focused questions, including about short-term rentals, ADU rules and housing affordability. She told the board she expects to return for another session and work with staff on data requests.

The board did not adopt new zoning at the meeting; members asked staff to verify water/sewer capacity and to update inventories (current-use acreage, rental vs. ownership shares, concentration of LLC ownership of rental stock). The master plan timeline discussed in the meeting referenced a broader update target around September 2026 and a near-term survey rollout.

The board also approved the meeting minutes with a clarifying amendment referencing TMOD section 505-H2-B and C and adjourned after a recorded vote with two members opposing the motion to adjourn.

What's next: the board will review the survey results and updated data, and Judy is expected to return with draft language and implementation options for consideration in upcoming meetings.