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Planning board pauses proposed OSRD zoning changes, cites need for impact analysis and coordination with subdivision regs
Summary
After hours of debate on expanding Open Space Residential Design (OSRD) rules (including adding Residential C, setting small minimum lot sizes and changing density incentives), the Planning Board expressed substantial discomfort and moved to defer advancing the amendments to the warrant pending further analysis and coordination with subdivision regulations.
The Town of Northborough Planning Board spent the largest portion of its Jan. 20 meeting discussing proposed updates to the town's Open Space Residential Design (OSRD) bylaw and ultimately signaled it was not ready to advance a comprehensive package for this year's town-meeting warrant.
Planner staff and a board member presented a two-phase approach: some technical fixes could be considered for the coming warrant, while more consequential changes (including expanding OSRD applicability to Residential C and adopting very small proposed minimum lot sizes in some drafts) would benefit from further study. The proposed draft included options to allow duplexes by special permit, introduce cottage dwellings and set explicit minimum lot-area figures (some drafts proposed figures as small as 5,000 square feet). The planner noted that inclusionary-housing rules and septic/health-board constraints affect what is feasible on any given parcel.
Several board members raised repeated concerns about unintended consequences. Critics said the draft's small minimum lot areas could produce dramatic changes to lot patterns and asked for analysis of impacts on school enrollment, traffic, and town infrastructure. Other members flagged topography and ledge-blasting risks: under existing yield and ANR rules, developers previously obtained quirky, highly irregular lot configurations on steep ledge, and some members worried the OSRD could increase incentives to alter a site's topography (for example, blasting ledge) to create additional buildable area.
Planner staff explained that wetlands protections, Rivers Protection Act buffers and existing subdivision yield analyses already constrain certain lands from counting as buildable, but also acknowledged the town's subdivision regulations may need updates to ensure consistent treatment of slope, ledge and site disturbance. Multiple members urged that the OSRD rewrite be coordinated with a larger update to the subdivision rules and that the board pursue public outreach and an impact study before advancing major changes.
After extended discussion, a member moved to "pass over" the OSRD bylaw to a later date; staff clarified that the board does not need to take a formal vote to withhold advancing the article but the motion captured the board's sentiment to delay. Several members supported postponement and recommended that staff prioritize updating subdivision regulations and preparing outreach and an impact analysis before the board brings substantial OSRD changes back to public hearing.
The board did not adopt new OSRD language at the meeting; it instructed staff to prepare cleaner drafts without tracked changes for the public hearing packet and to explore coordination with subdivision-regulation updates and additional community engagement.
