HistoryFirst founded in 1992 as Site Concepts International, the firm was restructured in Napa, California leading to the incorporation of vanderToolen Associates (vTA) in 1996 on the principal of creating innovative, enduring, and unforgettable landscape solutions. Our success is a testament to our Clients who have repeatedly tasked us to design transformative and memorable landscape environments. In our commitment to Client service a second office was opened in Walnut Creek in 2014 followed by a third office located West Sacramento opened in 2017.SpecialtiesvanderToolen Associates Inc. (VTA) is an award-winning landscape architecture firm with offices in Northern California, providing landcape design services to developers and public agencies throughout the world. Our focus is in Planned Communities, High Density and Mixed Use Projects, Commercial, Hospitality, Model Homes and Parks.