Welcome to 508-510 Petaluma Avenue, a stylish and versatile home with attached ADU in beautiful downtown Sebastopol. This property built in 2006 features a spacious 2-bedroom, 2.5-bath main residence along with a well-appointed 1-bedroom, 1-bath ADU. The main home offers high ceilings, rich wood floors, granite countertops, a Bryant mini-split A/C system, a private courtyard, and an attached tandem two-car garage. The ADU includes its own private entrance and features a gas range, granite counters, in-unit laundry, and a detached one-car garage, making it perfect for extended family, guests, or rental income. Whether you're looking for a flexible living arrangement, rental income potential, or a turnkey investment, this downtown Sebastopol gem delivers exceptional comfort and versatility in a prime location.