A rare opportunity in San Mateo's desirable Knolls neighborhood! Custom-built in 1957 and cherished by the same family for nearly 70 years, this exceptional home is offered for the first time. Nestled on a secluded, nearly half-acre lot, the property offers privacy, space, and effortless single-level living. With 2,290 sq. ft., the home features 4 bedrooms and 2 bathrooms; beautifully updated kitchen and baths. The thoughtfully designed floor plan separates lively gathering spaces from the peaceful bedroom wing, offering an ideal balance of entertaining and everyday comfort. Light-filled living areas and expansive windows seamlessly connect indoors and out. The true showstopper is the resort-inspired backyard, featuring a sparkling pool, pool house, overlook deck, and generous entertaining spaces. Mature trees and lush surroundings create a private retreat. Ample additional parking alongside the home adds convenience and flexibility offering additional parking for cars or guests. Moments from Sugarloaf Open Space, scenic trails, parks, and schools, this special property is ready for its next chapter. Welcome to The Knolls Haven!