Iggy's Burger is a smashburger restaurant located at 4248 18th Street in San Francisco's Castro neighborhood, in a space that previously housed the Argentinian steakhouse Flora King. This is the third location for Iggy's Burger, which is owned by the couple's son, Ignacio "Iggy" Garat—the brand already has two locations in the North Bay, in Healdsburg and Sebastopol. It's open seven days a week from 11 a.m. to 11 p.m. The restaurant is family owned and operated, serving 100% grass-fed beef sourced from Northern California family farms, and makes all of its signature sauces in house—from Blue Ranch and BBQ to Hickory Maple, Iggy's Million Island, and Chipotle Island—with most fries cooked in traditional beef tallow, plus vegetarian-friendly fry options. A signature item is organic, locally sourced beef cooked in beef tallow, finished with a "Million Island" sauce, pickled onions, and Clover cheddar on a soft Hawaiian-style bun, and Sonoma Magazine has ranked the flagship "Iggy" burger among the best burgers in the county at its original Sonoma-area locations. The San Francisco spot also serves shakes, as it's from the family's own Sonoma County smashburger brand, and is tied to a related Angela's Ice Cream venture nearby. Reviews on sites like The Infatuation and Yelp describe it as a popular, casual neighborhood spot with drippy smashburgers, crispy tallow fries, and a large, lively dining room, though some note the milkshakes can be a bit thin.

Iggy’s Burger is a newly opened counter-service smashburger restaurant at 4248 18th Street in San Francisco’s Castro district, launched in summer 2026 by the team behind the former Flora King restaurant in the same space. It specializes in grass-fed smashburgers, with options such as The Iggy, Bacon Piggy, and Iggy’s Rodeo, plus beef-tallow fries, onion rings, chicken sandwiches, dipping sauces, and shakes made with Angela’s Organic Ice Cream. The Infatuation recently praised its juicy smashburgers and crisp fries and notes that the restaurant has ample seating for casual or solo meals. Iggy’s website currently lists its Sonoma County locations but does not yet show the San Francisco outpost on its locations page, so checking current hours before visiting is advisable.

Iggy's Burger, located at 4248 18th St in San Francisco's Castro district, is a recent expansion for the family-owned burger concept, which also operates in Healdsburg and Sebastopol. As of July 2026, this location, formerly Flora King, is transitioning to offer grass-fed smash burgers, a full bar, and Angela's Ice Cream shakes. Consumers can expect a menu featuring items like "The Bacon Piggy," "The Biggy," and "Tito's Truffle Fries," with a focus on 100% grass-fed beef and house-made sauces. The San Francisco restaurant is planned to be open seven days a week from 11 a.m. to 11 p.m..

Iggy’s Burger is a counter-service smashburger restaurant at 4248 18th St. in San Francisco’s Castro neighborhood, with a casual setup and a menu centered on burgers, fries, onion rings, shakes, and some bar offerings. Recent listings describe it as family-owned and note it’s open most days in the late afternoon and evening, though hours can vary by source.

I'm not familiar with Iggy's Burger in San Francisco, CA, so I can't provide confident details about its menu, hours, or history. It is listed as a burger restaurant in San Francisco with the website which will have the most current menu, hours, and ordering information.

I am not familiar with a specific burger restaurant named Iggy's Burger in San Francisco, CA, at that website.