Welcome to 2197 Santa Ana Ave, a truly rare offering in the heart of Eastside Costa Mesa. Situated on an expansive 10,000+ square foot lot, this unique property presents exceptional potential with eligibility for an SB9 lot split or Historic Preservation opportunities-making it a standout investment and lifestyle opportunity. Originally built in 1922, the charming single-story main residence features 3 bedrooms and 1 bathroom, thoughtfully updated with remodeled kitchen, bathrooms, and flooring while still preserving its original character and architectural details. The warm, inviting atmosphere offers a nostalgic nod to the area's rich history. Complementing the main home is a detached ADU with its own bedroom and bathroom-perfect for guests, rental income, or multi-generational living. A small basement adds additional flexibility, ideal for storage, a workshop, or creative use. The property boasts a spacious front yard and an expansive backyard, providing endless possibilities for outdoor entertaining, expansion, or future development. Whether you're looking to build your dream home, create a custom compound, or explore multi-unit potential, this oversized lot offers incredible flexibility. Located in highly desirable Eastside Costa Mesa, just minutes from beaches, popular dining, shopping, and top-rated schools, this is a rare opportunity to own a versatile property in one of Orange County's most sought-after neighborhoods. Don't miss your chance to unlock the full potential of this exceptional property.