Upstairs, the layout follows a strict but intuitive logic. The clients private spacesincluding their bedroom, library, and officesare in one volume, Kline explains. A beautiful spiral staircase stitches those spaces together, leading from their seasonal closet down to their private spa. Meanwhile, guest quarters and entertaining spaces are carefully separated, ensuring privacy without sacrificing connectivity.Given the homeowners deep appreciation for art, the interiors were designed as a gallery for living. If youre going to live with art, how do you shape the finishes and materials to complement itnot compete? asks Kline. The answer was a restrained palette of white oak, light marbles, and wire-brushed finishes that create texture without overwhelming the artwork. The central stairwell, in particular, was imagined as a gallery wall, Weissberg explains. The client loves large-scale pieces, so we designed the architecture around them.The spas custom stonework was designed to be both luxurious and highly intentional, with intricate patterns and tailored layouts enhancing the serene atmosphere. The whole spa has a custom floor layout. We picked multiple stones and had them custom cut and fit together, says Weissberg.The steam shower in the primary suites spa-like retreat is designed for both function and tranquility. All the light in the space is all natural light, even though were underground, says Weissberg. Positioned near a light well, the space feels bright and open, enhancing the sense of relaxation.Interior designer Nicole Ficano, who led the furnishings and material selections, embraced the art-forward concept by prioritizing timeless, understated pieces. A lot of the furniture was focused on quiet elegance, she says. Nothing too flashy, nothing over the topiconic pieces that stand the test of time, with beauty in their form and shape.The palette reflects this restraint. We chose a lot of materials that were very light in palette, complemented with soft blues, Ficano says. We wanted to create a quiet space that allowed you to appreciate the landscaping and the beauty of nature, without distracting from the sense of place.The media room was designed as a flexible, inviting space, with a custom U-shaped sofa and modular leather ottomans for maximum comfort. The arrangement of the Usona Home ottomans in the center of the room reflects the configuration of the Bone Simple Design lights above, says Ficano.The challenge was choosing different types of white and having them all work together, says Ficano. White can lean cool, warm, or yellow, so we were incredibly intentional with the materiality, focusing on natural fibers and luxurious textures. We had stacks and stacks of white linens to sift through.The clients eye for detail extends beyond architecture and interiorsright down to the towels and pool cues, each subtly branded with a custom house logo by Workshop/APD. Its an extra layer of design, says Kline. And it makes the home feel even more personal. The end result is a home that feels completely custom to the clients, but remains deeply connected to its surroundings. Looking at it from the street, youd never guess how much is happening below, says Weissberg. And thats exactly the point.