A house needs more than good bones to stand the test of time. This 1920s Mediterranean Revival home in San Franciscos Presidio Heights also had a fairy godmother in Palmer Weiss. The founder of Palmer Weiss Interior Design transformed the 4,500-square-foot, four-bedroom home in phases over the course of 15 years, rather than in one single sweeping renovation, to make sure it evolved along with the people who own it.When we originally began, the family had very young children, dogs, and a hectic work life. The home needed to accommodate the practical demands of their everyday life, yet also have some glamour that spoke to their personal style, Weiss says. Now, the children are older, and there is less emphasis on durability and more on having spaces that can serve multiple purposes for all family members.A decade and a half ago, Weisss first order of business was to open up a dark, uninviting dining room into an airy adults-only living room and to create a kid-friendly family room within the large kitchen. In the latest iteration of the homes evolution, Weiss, working with architects at Charlie Barnett and Associates, reimagined how each room flows into the next. She combined the dining room with a family sitting room, integrating it into the kitchen. With older, less rambunctious kids, this setup works well, and the dining table even doubles as a great homework spot, she explains. Meanwhile, the living room remains cozy and invitingperfect for family movie nights and elevated entertaining. There, Weiss turned up the volume with custom-painted high-gloss cobalt walls flanked by arched windows with ethereal mauve curtains.The challenge of working in phases, Weiss says, was to make the home feel both fresh and cohesive, linking each renovation to the next. To that end, she leaned in to the blue, mauve, and lilac shades the family chose during the original renovation. When you use hues adjacent to each other on the color wheel, it creates a unified, quieter feel, she explains. Fewer colors are competing for airtime. Keeping the palette constant ties the spaces together beautifully, year after year.EntryRead McKendreeSide-by-side Jasper chairs upholstered in Katie Leede & Co. fabric echo the style and colors of the Lee Jofa sofa in the formal living room and provide a moment of fun, designer Palmer Weiss says. Floor lamp: The Urban Electric Co. Living RoomRead McKendreeSouth-facing windows allow light to pour in, brightening the high-gloss cobalt blue walls. Chair: Soane Britain, in Scalamandr fabric. Sofa and pillows: Hardesty Dwyer & Co., in Lee Jofa fabric. Rug: Stark. Mantel: Waterworks. KitchenRead McKendreeWeiss calls this green high-gloss paint the ultimate lever to pull in transforming the room. Paint: S6030-G, Fine Paints of Europe (walls, cabinets, trim). Sconce: Visual Comfort & Co. Table: Fox Marble (top), Villa & House (base). Chairs: Alfonso Marina.Dining AreaRead McKendreeCerused cabinetry and a dark table achieve a balance, making the space both family- friendly and stylish. Ceiling paint: Light Blue, Farrow & Ball. Cabinetry: custom, Bo Williams. Chairs: Erinn V., in Schumacher (seat) and Fortuny (back) fabrics.Primary BedroomRead McKendreePlaid drapes and a corduroy- covered settee bring a mens haberdashery feel to a stereotypically feminine palette. Wall paint: Peignoir, Farrow & Ball. Bed: Nickey Kehoe. Chandelier: Soane Britain. Drapery: Susan Lind Chastain, in Holland & Sherry fabric. Dresser: Crump & Kwash.Girl's RoomRead McKendreeStudyRead McKendreeRead McKendreeThe walls gray faux-bois finish by Katherine Jacobus Decorative Arts is a playful take on traditional library wood paneling. Art: Danielle Mourning. Side tables: Go Build Studio. Sofa: Hardesty Dwyer & Co. Rug: JD Staron. Ottoman: A. Rudin. Drapery fabric: Sandra Jordan. Follow House Beautiful on Instagram and TikTok.