Set behind gates on 1.39 acres in Tucson's coveted Catalina Foothills, this architecturally distinctive 1961 burnt adobe California Ranch blends timeless character with thoughtful modern upgrades. Single-level living, warm materials, and seamless indoor-outdoor flow define a property designed for both everyday comfort and elevated entertaining--without HOA restrictions. The main residence and separate guest house total 4,671 square feet, offering five bedrooms and four-and-a-half baths with flexibility for multigenerational living, guests, or a private home office. Vaulted wood ceilings with exposed beams, expansive glass, energy efficient double pane windows, plantation shutters throughout, stone tile flooring and abundant natural light create an inviting sense of space while honoring the home's mid-century roots. At the heart of the home, the living and dining areas open effortlessly to the outdoors, where retractable glass walls connect interior spaces to a terraced backyard oasis. The kitchen and adjacent dining and living rooms are positioned for gatheringwhether hosting large celebrations or enjoying quiet evenings by one of the home's three gas fireplaces. The primary suite is privately situated and designed as a true retreat, featuring a walk-in closet and a spa-inspired bath with heated floors, full slab granite counter tops w/dual vanities, a soaking tub, and a multi-head shower. Three additional bedrooms and two baths are thoughtfully arranged to provide privacy and comfort. A short walk through the manicured landscaped grounds leads to the separate 508-square-foot guest house, offering its own living area, kitchenette, bedroom, bath, and private outdoor spacemirroring the refined finishes of the main home and ideal for extended stays. Outdoors, the property lives like a private resort. A heated saltwater Pebble Tec pool, covered ramada with fireplace, outdoor grill, fountains, and multiple seating areas are surrounded by mature desert landscaping, fruit trees and panoramic mountain views. There is ample room for horses, RV parking, and additional vehicles, all within a fully fenced, gated and secure setting. Recent ownership brought extensive upgrades focused on infrastructure, technology, and ease of living. Approximately $200,000 in improvements include a comprehensive security and camera system with full perimeter coverage, restored and expanded landscape irrigation and lighting, plumbing and electrical upgrades, a whole-house water conditioning system, updated pool equipment, refreshed exterior paint, and a new mini-split HVAC system for the guest house. The main home features three zoned HVAC systems, while the 459-square-foot garage is heated and cooled, adding year-round functionality. Originally built in 1961 and carefully stewarded through generations, this Hacienda Del Sol estate offers rare authenticity paired with modern reliability. Enjoy privacy just minutes from dining and shopping, it delivers a tranquil Foothills lifestyle with architectural character that is increasingly hard to find. Highlights: ~1.39-acre gated Foothills property | No HOA ~4,671 SqFt total | 5 beds | 4.5 baths | Single story ~Separate guest house with kitchenette w/private outdoor space ~Heated saltwater Pebble Tec pool & covered ramada with fireplace ~Burnt adobe construction, vaulted beam ceilings, retractable glass walls ~Three zoned HVAC systems + guest house mini-split ~Heated/cooled garage, RV parking, horse property zoning A rare opportunity to own a legacy Foothills propertyarchitecturally warm and effortlessly livable.