Built in 1936, 120 Alta Avenue is a traditional Alamo Heights residence combining period character with substantial updates and expansion. The home occupies an unusually generous 0.258-acre, 75-by-150-foot parcel-one full platted lot plus half of the adjoining lot-providing considerably more outdoor space than many neighboring properties. The approximately 3,152-square-foot interior offers four bedrooms, three full bathrooms, two living areas, formal and informal dining spaces, a study or nursery and extensive built-in storage. Hardwood floors and a working wood-burning fireplace preserve the home's original warmth, while six French doors connect the family room to a covered patio and expansive backyard. The main level includes the primary suite, an additional bedroom and bathroom; upstairs are two spacious bedrooms with large walk-in closets and a third full bathroom. Additional features include double-paned windows, two central HVAC systems, an attached one-car garage, a carport and a widened rear driveway. The large backyard offers room for recreation, gardens and, subject to municipal approval, a pool, casita, studio or additional garage. Located near Cambridge Elementary and Alamo Heights High School, the property reflects the layered architectural history of Alamo Heights' Cottage District, where many early twentieth-century homes evolved through thoughtful additions. With its mature trees, extra-wide lot and flexible floor plan, 120 Alta Avenue offers uncommon space and enduring character in an established, desirable neighborhood.