Set within the highly regarded Willow Creek AVA, this exceptional estate spans 63.95± acres, including approximately 31± acres of established certified organic vineyard under the Williamson Act, offering agricultural value and long-term land stewardship. The 3,150± sq. ft. residence, originally built in 1978 and thoughtfully remodeled in 2023, maintains its authentic character while enhancing modern comfort and functionality. The home features two primary suites plus a loft. The primary suite includes dual en-suite baths, providing separation and privacy, with three total ¾ bathrooms throughout. Open-concept living areas seamlessly connect the kitchen, dining, and great room, while expansive sliding doors lead to a front patio and rear deck overlooking Sheep Camp Creek, creating effortless indoor-outdoor living. Surrounded by vineyard rows, mature oaks, and natural landscape, the property offers a true wine country setting. The vineyard includes 13 varietals - Bourboulenc, Cabernet Sauvignon, Cinsault, Counoise, Grenache, Grenache Blanc, Mourvedre, Petite Sirah, Picpoul Blanc, Syrah, Vaccaresse, Vermentino, and Zinfandel - and achieved California Certified Organic status through CCOF in 2022. Infrastructure includes the original 1,800± sq. ft. Mastantuono winery building, a 1,100± sq. ft. secondary structure, 50' x 36' pole barn, 32' x 40' metal equipment building, and an owned 14.5 KW solar system installed in 2020 and expanded in 2024. Water resources include an approximate +/- 24 GPM well supported by four storage tanks totaling approximately 22,500 gallons. Ideal as a boutique wine operation, private vineyard retreat, or legacy holding, this offering combines productive acreage, established infrastructure, and Central Coast lifestyle​​‌​​​​‌​​‌‌​​‌​​​‌‌​‌​​​​‌‌​​‌​​​‌‌​‌​​ appeal.