Nestled in the heart of Cow Hollow, this exceptional Union Street property presents a rare opportunity for expansion and ADU, and is now available for sale. This property is located on one of the most vibrant streets in San Francisco. Union St. shops and restaurants are steps from the front door. This unique property combines historic charm, modern possibilities, and unbeatable location. The building features a roof deck, built with Trex decking, with sweeping views of the Bay, the City, the Marina, and Bay Area. The ground floor offers a spacious garage, unwarranted one bedroom apartment, and unwarranted storage rooms. The backyard is a landscaped refuge with a French Drain and automated drip irrigation system. This location is also conveniently close to the Marina Green, Fort Mason, Lombard St., Van Ness Ave., and the Financial District. The top floor flat is vacant, opening up immediate possibilities for customization, occupation, or rental income. The flat has stainless steel appliances and Liebherr Refrigerator. Seller is willing to consider the sale of a portion of the property as a TIC presenting a flexible investment opportunity.