Clayton, CA is a small city of about 11,000 at the base of Mount Diablo, just east of Concord, with a historic downtown around The Grove Park, larger lots, and direct access to Mount Diablo State Park. I have worked the East Bay market for more than 20 years …

The previous owners converted your garage into a family room. Or maybe you added that beautiful patio cover yourself ten years ago. Perhaps there's a bathroom that was there when you bought the house. None went through formal permitting—and now you're selling.

The question keeping you up at …