Rare Eastside Costa Mesa opportunity with two fully detached homes on a double lot directly across from Lindbergh Park. The Cape Cod-inspired main residence offers approximately 2,569 sq ft with 3 bedrooms and 2 baths, highlighted by vaulted ceilings, a first-floor primary suite, a wood-burning fireplace, indoor laundry, and a 2 car garage. Recent improvements include fresh interior paint, updated kitchen with new kitchen countertops, sink and faucet, luxury vinyl plank flooring and new carpet. Built in 2015, the separate second residence/ADU offers approximately 1,200 sq ft of single-level living with 3 bedrooms and 2 baths, its own central air and heat, EV-charger, a new refrigerator, and a private backyard with fruit trees and a vegetable garden. With true separation between residences, the property offers exceptional flexibility for multigenerational living, guests, a home office, or potential rental income. Just moments from the Back Bay, 17th Street dining and shopping, and Newport Beach, 247 23rd Street combines space, versatility, and location in one of Costa Mesa's most desirable neighborhoods.