515-519 Duboce Ave, San Francisco, CA 94117

The three-unit residential building at 515-519 Duboce Avenue in the Duboce Triangle neighborhood, owned by Supratik Lahiri and constructed in 1900, has undergone substantial improvements and renovations over recent years, with significant attention to modernization and safety upgrades. Most recently, in February 2023, the property received new shower installations and water heater upgrades across all three units.

In late 2022, the building enhanced its safety features with a comprehensive expansion of the fire sprinkler system, adding 36 new sprinklers and relocating existing ones at a cost of $20,000. The building underwent major interior renovations in 2021, including kitchen and bathroom relocations, window enlargements, and electrical upgrades, followed by the installation of three Tesla Powerwall units and solar panels in 2023 with an investment of $28,000, demonstrating commitment to sustainability. The property has seen consistent infrastructure improvements, including a 400-amp electrical service upgrade in 2022, installation of new heat pump systems, and comprehensive plumbing updates.

Earlier maintenance addressed structural issues, such as dry rot repairs completed in 2022, and the building's fire safety systems have been systematically improved since 2014, when a new fire sprinkler system was first installed. The building's management has maintained a proactive approach to maintenance and upgrades, with all recent permits showing proper completion status. While there have been multiple 311 calls regarding parking enforcement and illegal postings in the vicinity of the building between 2020 and 2024, these are external to the property itself and have been appropriately resolved through municipal channels.