Staff: river buffers, frontage limits and fire code cap potential development on Putnham Hill parcels

Aug 17, 2026

Planning staff told the board that river-protection buffers, frontage requirements and a four-unit per-lot cap under the zoning table (footnote five) make a large build-out unlikely; staff estimated a current yield of roughly eight units on the combined lots versus a speculative maximum of about 12 if the parcels were rezoned and engineered differently.

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Planning department staff presented a technical review showing the development yield on the two parcels is constrained by existing village-zone frontage, wetlands/topography and river-protection restrictions. Staff gave parcel figures — 430 Putnham Hill Road at about 2.85 acres and 434 Putnham Hill Road at about 3.53 acres — and explained the zoning table requires 20,000 sq. ft. and 100 ft. of frontage for a single-family home and increases required lot area for multifamily units; multifamily dwellings are allowed only in the village district and are limited to four dwelling units per lot under the town’s footnote five.

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