The Northborough Conservation Commission closed the continued notice of intent for an accessory dwelling unit (ADU) at 23 Meadow Road and voted to issue an order of conditions after presentations from the applicant’s project team.

Backyard ADUs and environmental consultants described a revised plan delivered the afternoon of the meeting that reduced impervious cover compared with an earlier design, added mitigation plantings in the wetland buffer, and removed a gazebo and paved walkways so the proposal results in net additional protected area in the 50‑foot wetland buffer and riverfront area. Consultants said the proposal is riverfront redevelopment and complies with applicable regulations; the plan includes sediment controls, a catchment/silt sock at an existing catch basin to address DEP comments, and a planting plan that exceeds the required mitigation area (proposed ~1,750 sq ft mitigation versus required 1,060 sq ft).

Commissioners and staff confirmed the sewer alignment and agreed that no trees will be planted over the sewer easement. The project team said the ADU will be delivered modularly, with an insulated concrete form (ICF) foundation; they committed to as‑built plans and photographic documentation after construction. Commission staff requested that final dry‑well design and any soil groundwater clarifications be submitted and approved before issuance of a building permit; the applicant agreed.

The commission voted to close the hearing (roll call: Dan Clark—yes; Todd Hellwig—yes; John Johnson—yes; Sadie Stone—yes; Greg Young—yes) and to issue the order of conditions with the standard special conditions plus a clause that dry‑well design revisions be submitted for staff approval before the building permit is issued. As‑built plans and planting survival documentation were required as post‑construction conditions.