Penney is a custom residential landscape designer and founded Magrane Associates Landscape Design in 1986 in San Francisco. By fusing horticultural knowledge with attention to detail, timeless classic design and cutting edge sophistication, Penney built Magrane Associates from the ground up. Thirty-two years later, with offices in San Francisco and Sonoma, over 650 completed projects and countless awards, Magrane Associates is still dedicated to providing clients with thoughtful, personalized service and creating life-changing gardens and landscapes that provide timeless beauty, environmental sustainability, longevity and enjoyment for years to come. Penney is now a full-time resident of Sonoma with her wife of 27 years, Dr. Joan Howley, a retired professor of anesthesiology at UCSF. Together, they enjoy entertaining and have hosted several garden tours and fundraisers to contribute to community efforts such as Impact100, Historical Cottage Garden Tour, Newcomers Garden Tour, Human Rights Campaign, Pets Lifeline, San Francisco Day School, Phoebie Hearst Preschool.