4838 Robertson Avenue AUCTION: DESIGNED TO BE EXPERIENCED. This architecturally distinctive octagon-inspired, single-story custom residence features top-quality construction, premium materials, and thoughtful architectural detail throughout. A dramatic central skylit atrium fills the home with natural light and privacy, while the radial layout allows rooms to flow naturally and remain clearly defined. The central atrium functions as usable living space but it is not included in tax rolls. This adds approx 275 square feet, bringing the home's total living area to approx 3, 115 square feet. The main level offers 3 bedrooms and 3 full bathrooms, including two en-suite bedrooms, with all primary living spaces on one level. Overlooking the atrium, a lofted family room provides flexible use as a media room, office, or easily convertible 4th bedroom. Indoor living extends outdoors to a resort-style backyard featuring a solar-heated saltwater pool, a pergola with misters and a fan, a separate hot tub, and a tranquil koi pond with a waterfall and filtration system. The oversized, tree-canopied lot enhances privacy and serenity. An upscale garage is designed as a fully integrated mechanical hub with owned solar, tankless water heating, radiant heating infrastructure, whole-house central vacuum, water filtration system, built-in cabinetry, and a dedicated mini kitchen. Situated on a private gated lane leading to a quiet cul-de-sac, this custom Carmichael home offers architectural character and enduring build quality, close to Ancil Hoffman Park, the American River Parkway, shopping, dining, and convenient access to Hwy 50 and I-80.