Find 4 duplexes for rent in Castro Valley, CA. A duplex is a type of residential building divided into two separate units with their own entrances, often mirroring each other in layout. Renting a duplex allows renters to experience the privacy and space you'd find in a single-family home, along with the affordability and convenience of apartment living. Renters can enjoy increased living space, potential access to a yard, and fewer neighbors than in traditional apartment communities. Additionally, duplexes often provide perks like in-unit laundry facilities and off-street parking. For those interested in renting a duplex in Castro Valley, CA, ForRent.com provides a comprehensive listing of available properties, ensuring you find a place that suits your lifestyle and budget.