RARE OPPORTUNITY BORDERING ALAMO! This custom 6 BR/ 3.5 BA home has it all! Perched at the end of a cul-de-sac sits 1815 Castle Gate Rd on just over 1 acre offering Mt. Diablo views, privacy and nearly 3,700 sq.ft +/- of functional living space. Main level greets you with grand vaulted ceilings, formal living and dining, primary bedroom suite, laundry room and entertainer?s kitchen. The open kitchen, dining and family room concept makes it the perfect space to host and entertain. Walk out onto the expansive deck off the kitchen and family room. All downstairs rooms have private access to the backyard. 5th room was used as a study and the 6th room was used as a multi-purpose room, both could be used as possible bedrooms. With over 1 acre of land, the possibilities are endless...Think pool site, ADU or vineyard? Additional highlights: Newer roof (2018), owned solar, central whole house vacuum, newer dual zone HVAC (2019), 3 car garage, 70 gallon water heater. Top rated Acalanes Union High School district, conveniently located to downtown Walnut Creek, shopping, dining, Kaiser, BART, freeway, and Iron Horse Trail.