Columbia Community, Castro Valley A Planned Unit Development
The Columbia Community was started in the early 1980s. Blackwell was one of four builders. A total of 541 homes climbed up the Castro Valley hillside and along the ridges. The backyards of many homes have views of rolling hills tree-lined canyons, hiking trails and much more. Columbia is known for its intimacy and small neighborhood collaborations. Many families take walks around the park and up and down the hillside. The community pool and spa are open for residents May through September.