Located on a rare 35-foot-wide parcel in the highly coveted 200 block of Larkspur, this exceptional offering presents a unique opportunity to enjoy 221 Larkspur today while thoughtfully planning for the future. The existing residence is a charming mid-century modern bungalow, predominantly single-level in design, featuring 4 bedrooms and 3 bathrooms. The main level offers three bedrooms and two full baths, while a private fourth bedroom with its own en-suite is positioned above the garage-ideal for guests, a home office, or added privacy. For those looking to build, a fully approved contemporary design by ROST Architects provides a seamless and expedited path to redevelopment. The plans showcase a striking new residence spanning approximately 3,800 square feet, offering up to 5 bedrooms plus a flexible bonus space, 4.5 bathrooms, and an elevator servicing all three levels. Two thoughtfully designed rooftop decks capture sweeping ocean and harbor views, elevating both the architecture and the overall living experience. Whether enjoying the home in its current form or bringing this architecturally significant vision to life, 221 Larkspur represents a rare and compelling opportunity in one of Corona del Mar's most sought-after neighborhoods.