Welcome to 109 Castle Hill Ranch Road, a truly rare opportunity to own one of the only flat, half-acre vacant lots available in the highly sought-after Walnut Creek, Tice Valley area. This expansive, buildable lot offers endless potential to design and construct your custom dream home, with ample space to include an accessory dwelling unit (ADU) for guests, rental income, or multigenerational living. Perfectly situated in a prime location, this property is just minutes from the vibrant heart of downtown Walnut Creek, home to an exceptional outdoor shopping mall featuring world-renowned stores, charming local boutiques, and a diverse selection of restaurants and cafes. You'll also enjoy its close proximity to highly rated schools, convenient access to Highway 680, Walnut Creek BART, and a short drive to multiple Bay Area airports. This property was Parcel B of a two-lot recorded subdivision and ready to build your dream home and possible accessory dwelling unit. This is priced to be sold with the adjacent property Parcel A (2339 Tice Valley Blvd. - MLS Listing #41094071), which has an existing Italian Spanish villa home built by an east bay dentist as a vacation home-in-country. Imagine the convenience of having side-by-side properties with endless barbeques and family gatherings.