HDC approves rooftop solar at 6 Broad Street, requires vent relocation and small array adjustment

The Nantucket Historic District Commission on Oct. 7 approved a rooftop solar array for a commercial property on Broad Street, clearing the project with a single condition intended to reduce visibility from nearby public ways.

Applicant Tobias presented an array sited on rear roof planes of Young’s bicycle shop. Commissioners and the Historic Structures Advisory Group raised concerns about visibility from Oak Street and recommended locating panels on secondary roof masses where possible. The applicant explained panels were placed for energy efficiency and advised that moving them would reduce performance.

After discussion the commission approved the array with a condition requiring relocation of an exposed vent pipe to a less-visible roof plane and asked the applicant to fill a small, irregular gap in the array so the installation reads as a regular field rather than a ragged line. The motion carried with one commissioner in opposition.

Why it mattered: The Old Historic District contains a high concentration of public view corridors; rooftop solar balances renewable energy goals with design sensitivity. The condition seeks to reduce the installation’s downtown visibility while allowing the owner to move forward with renewable energy.

Next steps: The applicant will submit a revised plan showing the vent on a different roof plane and the filled array panel; staff will confirm the change by inspection after installation.

Ending: The commission noted the array was a net improvement over ad-hoc rooftop mechanical clutter and said the minor vent relocation would improve long‑term public views.