Rare opportunity to acquire the last undeveloped parcel in a gated 7 lot enclave in the sought-after Liberty School District. Located on the outskirts of West Petaluma, 21 Valen Way comprises approx. 3.48 acres with breathtaking views of the rolling hills and surrounding countryside. Extensive pre-construction work has been completed with an approx. 12 GPM well in place and an approved 5 bedroom septic plan on file with the County of Sonoma. Farrell and Faber Architects designed a custom, approx. 3,014 sq. ft single-level residence with a detached 3 car garage with a 508 sq. ft flex space above and a detached 1,018 sq. ft accessory dwelling unit (ADU) for this site. Interior design plan is available for the new owner to consider. Custom landscape plans on file as well, which provide a visual overview of the site placement of the residence and the potential for a private, gated driveway and attractive amenities including pool/spa site, extensive gardens, pathways and an orchard. Expedite your build or make the plans your own. Located within easy access of the freeway as well as both Historic Downtown Petaluma and the Sonoma Coast. Buyer encouraged to consult with the County of Sonoma.