DeFremery Park is an island. A two-story light blue Victorian sits alone in a massive yard, surrounded by fields of vibrant green grass. It’s quiet in the park on most days, the building’s stoic presence adding a layer of calm to the surrounding West Oakland neighborhood. The house sits next to a tennis court, a skate park, a swing set, basketball courts, a baseball diamond, and an indoor swimming pool—all of which go consistently underused on Oakland’s many sunny days….