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Commission opens review of San Francisco glazing rule after developers and residents clash
Summary
The commission heard testimony for and against a San Francisco amendment to require exterior glazing in habitable rooms (Section 1205.1). Developers urged deletion to enable infill housing; others warned of habitability and health impacts. Staff will return with background and planning input before the commission acts.
Commissioners took public comment on a proposed action to delete a San Francisco amendment to Section 1205.1 of the building code that requires exterior glazed openings (natural light) for habitable rooms. The amendment, adopted in the 2011 code package, is more restrictive than the California code and has blocked some conversion projects that would otherwise borrow light from adjacent rooms.
Design professionals and developers said the local change had been added without adequate industry notice, has imposed unexpected costs and has stalled infill housing projects in tight urban lots. John O'Connor and multiple architects said the state code allows borrowing light and air from an adjacent room and urged reverting to the California standard to ease conversions and increase housing density.
Other speakers and some commissioners warned of habitability and sustainability trade-offs if exterior glazing requirements are relaxed, arguing natural light and ventilation improve health and reduce energy use. Commissioners noted the Code Advisory Committee opposed deletion and that the department lacks staff presentation materials at this meeting. They directed DBI to research the amendment's adoption history, coordinate with Planning and Code Advisory, and return with a fully documented recommendation.
Next steps: Staff will gather the Code Advisory Committee record and planning input, report back with the amendment's history and anticipated impacts, and schedule the matter for a future hearing.
