After writer Rachel Levin scouted the nearby Clipper Street House in San Francisco, owned by Lorena Siminovich, the founder of Petit Collage, she was determined to make her toddler's room way cooler. A former senior travel editor for Sunset magazine, Levin has also written for the New York Times and San Francisco magazine.

A Couple Tackles Conversion Challenges and Builds a Modern Renovation
To convert a musty mid-century house with a nonsensical floor plan into a modern and space-efficient family home, three…