Have to see the "Secret Garden House"! Step into the charm of classic Fullerton living with this beautifully updated home tucked away in the highly desirable Upper Golden Hill Historic District. From the inviting front porch swing to the mature shade trees and timeless brick details, this home delivers warmth, character, and curb appeal. Great ADU Income potential! Inside, vintage style blends seamlessly with thoughtful modern upgrades. Features include a remodeled kitchen and bathrooms, rich engineered cherry wood flooring, dual pane windows, central heating and air with a Nest thermostat, a cozy brick fireplace with custom craftsman-style woodwork, a charming bay window, and elegant French doors that bring natural light throughout the home. There is a full-home water softener system plus there is available power for a charging station with the upgraded electric panel. The fully fenced private backyard is designed for relaxing & entertaining, complete with a spacious covered patio, checkerboard pavers, and mature trees that create a peaceful outdoor setting. Additionally, there is a large cleared side yard perfect for play or larger gatherings. At the rear of the property, a private entertaining area has been created with cement walls, overhead market lights, and plenty of space for a wonderful garden filled with vegetables, flowers, herbs, and more. A detached two-car garage with epoxy flooring offers excellent flexibility for parking, hobbies, or workspace needs. A mini-split HVAC unit was added to make the garage comfortable year-round. Set on an expansive nearly half-acre lot stretching more than 280 feet deep behind a remote-activated swing gate, the property offers exceptional privacy, space, and future potential. Located near the Fullerton Loop, Muckenthaler Cultural Center, and the shops and restaurants of downtown Fullerton, this is a rare opportunity to own a home that captures the character of a bygone era while offering the comforts buyers want today. BONUS: Approved architectural and interior design plans are included to add a second story covering the entire footprint of the first floor, adding nearly 1,700 square feet of additional living space. The Upper Golden Hill Historic District is considered one of the most charming and character-rich areas in Fullerton No HOA rules & fees are wonderful. Buyers are drawn to its historic architecture, larger lots, mature landscaping, and true neighborhood feel. Don't forget the Secret Garden!!