Located at the end of a long, gated driveway on a quiet cul-de-sac in South Pasadena's sought-after Altos de Monterey neighborhood, this spacious single-story home offers flexibility, privacy, and broad views of the San Gabriel Mountains and city lights. Set on over an acre of verdant grounds, it combines generous interior living with a serene outdoor setting. The main house features five bedrooms and four bathrooms, while a free-standing guest quarters adds a sixth bedroom, full bath, and living room--ideal for friends, extended family, or a dedicated workspace. Inside, high ceilings and large windows bring in abundant natural light. The formal living and dining rooms each feature a fireplace, picture windows, and sliding glass doors that open to a covered loggia. The kitchen is outfitted with granite countertops, stainless steel appliances, ample storage and a built-in breakfast table. Immediately adjacent is the family room, which includes a wet bar and custom cabinetry--perfect for casual gatherings and formal entertaining. The expansive primary suite has direct access to the yard, a walk-in closet, and a spa-style bath with soaking tub and separate shower. Outdoors, a pool and deck are nestled among mature trees and natural landscaping. Multiple areas for entertaining or quiet retreat include an Asian-themed courtyard garden with hand-pruned specimen trees. Additional amenities include an indoor laundry room and a two-car garage with direct entry. Just minutes from the 5, 10, and 110 freeways and Monterey Hills Elementary, this home offers a flexible layout, peaceful setting, and a prime South Pasadena location.