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Planning board recommends changes to 41/81L subdivision rules, clarifies they won't be retroactive
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Summary
The board recommended a citizen-originated update to rules governing 41/81L subdivisions to limit how division can change ground cover and to require clearer notice for later improvements; staff clarified the rules would not apply retroactively to previously endorsed plans.
The Nantucket Planning Board voted Tuesday to recommend a citizen-initiated article that would change how 41/81L subdivisions are treated for ground cover and nonconforming rights and to increase oversight for later property changes.
Planning staff told the board they met with town counsel and clarified a key point raised at earlier meetings: the update would not be retroactive. "It's not retroactive," Meg Trudell said, explaining that any 81L plan endorsed before the notice of the first public hearing would not be affected by the new rules.
The article, presented by the proponent Emily, aims to prevent newly created lots from effectively increasing the amount of buildable ground cover beyond what the zoning district allows. Board members pressed for concrete examples. Staff explained that under current practice each newly created lot under 41/81L historically could be entitled to the ground-cover allowance of the district (or a minimum like 30 percent), and that the proposed change would ensure that dividing a lot does not increase the total allowable ground cover for the overall parcel.
Staff also described a notice and oversight rationale: many 41/81L subdivisions are state-mandated by-right divisions that do not require public notice. Trudell said that while the subdivision itself can be by-right and receive no public notice, subsequent improvements or expansions that would change coverage would still be subject to legal notice requirements through the Zoning Board of Appeals.
Board members discussed edge cases (for example, a 10,000-square-foot lot split into two parcels where coverage percentages could be redistributed) and asked whether undersized lots automatically receive preexisting nonconforming rights; staff said the bylaw grants certain small lots set square-foot allowances in some instances but that newly created nonconforming lots would not automatically be granted the full set of preexisting nonconforming rights the town has previously recognized.
A board member urged the proponent to be prepared to offer an implementation-date amendment at town meeting to address residents or developers who have 41/81L plans in progress; Emily acknowledged that option. After closing the public hearing, the board moved to recommend adoption of the article as printed in the warrant. The chair noted the legal threshold for such a recommendation is two-thirds; the motion was recorded as passing by roll call.
The board did not set further conditions at the meeting; staff said they would follow up as the article moves through the warrant and town-meeting process.
