Charming Modern Custom Ranch designed by Master Architect Edgar V. Ullich in 1954.This historically designated residence embodies classic California living within a peaceful, rural setting - beautifully preserved, meticulously restored, and protected under the Mills Act, offering potential property tax advantages. The 1,943 sq ft single-level main residence includes two bedrooms and an office, thoughtfully arranged on one level. Restored in 2014 and maintained in excellent condition, the property also features a 1,197 sq ft guest house converted from a historic barn, offering two bedrooms, a great room, and a full bath. The residence and its accessory buildings are listed on the San Diego County Historic Landmark Register, underscoring their architectural significance and heritage value. This offering includes two legal lots totaling 5.61 acres (2.72 acre parcel including the historic house and quest house, and 2.89 acre vacant parcel). The grounds are beautifully maintained with a pristine garden and backyard, two enclosed pastures, multiple varieties of dragon fruit, stone fruit, citrus, and exotic specimen trees. This property is a well-preserved, architect-designed Modern Custom Ranch estate that embodies the original vision of Rancho Santa Fe-combining architecture, land, and lifestyle into a cohesive historic environment. A rare opportunity to own a meaningful and enduring piece of Rancho Santa Fe history.