WHEN SEATTLE DESIGNER Lauren Caron embarked on a recent renovation of a property in the city’s historic Capitol Hill neighborhood, her principal obstacle was creating the 1930s English-design and style cottage sense fresh new and feminine—more Girl Mary than lord of the manor. “The past owner was a designer for Ralph Lauren, so it was incredibly superbly carried out, but not the aesthetic the customer required,” stated Ms. Caron, who founded Seattle’s Studio Laloc and partnered with Mallet Style Build on this project. “It was all extremely stereotypically masculine.” To carry the areas in sync with the new stewards—a solitary, 40-some thing philanthropist and her beloved hairless cat, Prunella—Ms. Caron…