1721-1723 Greenwich St, San Francisco, CA 94123

The two-family residential building at 1721-1723 Greenwich Street in Cow Hollow, owned by Nicholas T Jr & Linda Neel, was constructed in 1946 and stands two stories tall. The property has undergone several significant improvements over the years, with the most recent major work being the installation of two new furnaces in the garage in May 2021. In 2010, the building received updated street-facing windows, with eight wood paintable fiberglass units installed at a cost of $12,500.

Earlier improvements include an attempted office space addition in 2003 (permit expired), electrical work in 2005, and multiple roofing projects, with the most recent completed in 2002 costing $7,500. The electrical system received an upgrade in 2004 to 200 amps, though this permit eventually expired. The building's maintenance history shows regular attention to infrastructure, particularly windows and roofing, with earlier permits indicating the installation of aluminum windows in 1985.

Recent activity on the street has primarily involved parking enforcement, with multiple citations issued for driveway blocking between 2020 and 2023. There have been several 311 calls for street maintenance, including garbage removal in 2021 and 2024, though these were external to the building itself. A fire incident was recorded at the property, classified as an "other" type fire with unintentional ignition, though no civilian injuries were reported. The property has maintained its classification as a flats and duplex building throughout its history, with a total of two residential units.