Rare opportunity to own a historically designated Prairie-style home with Mills Act tax savings & a newly built detached guest house with ADU potential in one of North Mission Hills' most sought-after neighborhoods. Designated Historic Landmark No. 821-92, this home enjoys Mills Act property tax benefits. Showcasing classic signature horizontal lines, broad overhanging eaves, massive porch supports & timeless craftsmanship, this residence is a true architectural treasure. A former owner was connected to the Western Metal Supply Co., whose iconic building now anchors Petco Park's left field corner, creating a unique link to San Diego's baseball history. The approx. 1,740 SF main home offers 3BR, 2BA & a spacious den ideal for an office, library or family room. Coffered ceilings, original hardwood floors, abundant natural light & period details blend seamlessly with a spacious kitchen featuring a breakfast nook. The newly built approx. 429 SF detached guest house above the oversized 2-car garage offers 1BR, 1BA & private living space, ideal for guests, multigenerational living, a home office or future ADU potential (buyer to verify). The garage includes EV charging plus an additional off-alley parking space. Enjoy a private backyard with an entertaining deck, patio & generous side yard. A walk-in basement provides excellent storage or wine cellar potential. Updated plumbing, sewer, electrical & numerous improvements offer modern convenience while preserving the home's historic integrity. Approx. 2,191 SF total living space. A truly rare Mission Hills offering. Adding exceptional versatility is a newly constructed approximately 429-square-foot detached guest house above the oversized two-car garage. Complete with 1 bedroom, 1 bathroom, and its own private living space, it is ideal for guests, multigenerational living, a private office, or future ADU potential (buyer to verify all permitted uses). The oversized two-car garage features EV charging. Outdoor living is equally inviting with a private backyard featuring a spacious deck and patio designed for entertaining, along with a generous side yard offering room for gardens, recreation, or future enhancements. A walk-in basement provides abundant storage, easy access to home utilities, or the opportunity to create a custom wine cellar. Extensive infrastructure improvements include updated plumbing, sewer lines, electrical systems, and numerous additional upgrades that provide modern convenience while preserving the home's historic integrity. Offering approximately 2,191 square feet of total living space, including the detached guest house, this exceptional residence seamlessly blends architectural significance, fascinating San Diego history, modern improvements, flexible living space, and the significant tax advantages of the Mills Act. Opportunities to own a home of this caliber and historical importance in North Mission Hills are exceptionally rare.