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Board approves modified window plan for North School (248 Congress St.) with conditions to match historic divided‑light pattern
Summary
The board conditionally approved replacement windows at 248 Congress Street (North School), asking the applicant to pursue a window configuration that better reflects the historic multi‑light patterns and to submit final window details to staff for approval.
The Portland Historic Preservation Board on May 7 conditionally approved a set of replacement windows for the landmark North School at 248 Congress Street, asking the applicant to pursue window divisions that better reflect the building’s historic divided‑light patterns and to submit final specifications to staff for verification.
The nut graf: the project replaces later, lower‑quality infill with a combination of a fixed upper spandrel that emulates the historic divided‑light upper sash and a new operable lower sash. Staff and the applicant told the board interior constraints — a lowered ceiling and mechanical runs from a previous rehabilitation — prevent full restoration of the original historic profiles; the board accepted a conditioned approach to balance historic appearance with tenant and building constraints.
Architect Michael Coyne, representing the applicant, described the constraints: ceilings had been lowered during a 1980s renovation to accommodate mechanical systems, and a full restoration of historic sash proportions would require reworking the building interior, tenant relocation and substantial expense. Coyne said the project team is working with Essex Preservation and the National Park Service on rehabilitation standards and proposed either a divided‑light spandrel at the top that visually reads as the historic upper sash or a 9‑light pattern in the spandrel with an operable lower sash arranged to emulate the historic proportions.
Public comment supported reversible treatments; Lisonbee Frazee of Greater Portland Landmarks urged the board to require any opaque top panels be reversible so that if future interior changes permit restoration, the historic sash could be recovered.
Board members discussed options that would better approximate the historic 9‑over‑9 or 12‑over‑12 patterns while keeping the lower operable sash functional. Several members suggested exploring alternative operable types — for example, casement or awning operations with simulated meeting rails — if they would produce a closer visual match and maintain required ventilation and egress. The board asked the applicant to investigate whether an operable system could better reproduce the historic light division and to provide final window specifications for staff review.
The board voted to approve the application with conditions: the applicant should investigate options that more closely emulate the historic divided‑light patterns and submit final detailed window specifications to historic preservation staff for approval. The motion carried in a roll‑call vote with all members present voting yes (Hillary Bassett; Robert O’Brien; Brian Sosby; Rob Whitton; Valerie Paquin Gould; Brad Miller).
