450-452 Collingwood St, San Francisco, CA 94114

The two-unit residential building at 450-452 Collingwood St, owned by the Tuan Yao Living Trust, is a two-story flats and duplex structure built in 1947 in the Eureka Valley/Dolores Heights neighborhood. The property's maintenance record shows some attention to infrastructure, with a $9,900 reroofing project permitted in 2017, though an electrical permit for a garage door opener from 2006 is now expired.

Recent parking and access issues have been prominent, with multiple enforcement calls between January and June 2024 regarding vehicles blocking driveways or parking on sidewalks. While all these cases were investigated, most resulted in either inability to locate the offending vehicle or no validation of the reported issue. The property's more serious concerns include an open sidewalk defect case from October 2022 documenting a collapsed sidewalk, which presents potential safety concerns for residents and visitors.

Additional infrastructure-related matters include a damaged tree incident from May 2020, though the resolution status is not fully documented. A January 2024 incident regarding garbage can management was resolved through DPW outreach, indicating some involvement of city services in waste management coordination. The building's documented history suggests ongoing challenges with parking regulation enforcement in the vicinity, though these issues are more surface-level compared to the structural concerns presented by the sidewalk defect.