Charming English cottage with detached ADU. This Castro Valley gem blends classic appeal with modern conveniences and ample space to thrive. Relax or entertain outside on the expansive deck with valley views, featuring a cozy fire pit and decorative maple tree, or inside next to one of the three fireplaces. Close to nearby schools and downtown Castro Valley restaurants. The 100-foot-long driveway accommodates multiple vehicles or RV/Boat. Detached 2 car garage plus a spacious ADU (appx 700 ft. in addition to the 1787sq ft main home) with a full kitchen, bathroom, heating/cooling/fridge and private deck; ideal for guests, home office, or rental income. Featuring: *Professionally engineered seismic retrofit *New roof *18-panel solar system with battery backup *700 sq ft ADU with full kitchen bathroom, and adjoining deck *New HVAC systems in main house and ADU *Lots of storage; two bedrooms have walk-in closets *Built-in tool shed or storage area *New carpeting throughout *Jacuzzi tub *Built-in water filter *Limestone tiles *Three fireplaces *Three Skylights in main home *Area for gardening