About Us

Founded in 1979, Keystone Corporation has made a significant and lasting impact on the City of Patterson's prosperity. Since pioneering West Patterson Business Park in 2003, Keystone has been a driving force in the Patterson community, developing projects like the Keystone Pacific Business Park. These initiatives have not only brought over 5,000 high paying jobs and new companies to Stanislaus County but also significantly enhanced the local economy. In addition, Keystone's commitment to the community is evident in the creation of Patterson Gardens and its substantial philanthropic efforts, which have contributed hundreds of thousands toward the renovations of the Patterson High School football stadium and Patterson Aquatic Center.

Patterson Gardens

Keystone Pacific Business Park

Pacific Distribution Center

How It Works

Here’s how we work with you every step of the way.

Our team is composed of passionate designers, horticulturists, and project managers who live and breathe landscaping.

Emma Carter

Lead Landscape Architect

Liam Rodriguez

Horticulture Specialist

Sophia Nguyen

Sustainability Consultant

Mark Thompson

Project Manager

We offer a comprehensive range of landscaping and gardening services.

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Landscape Design & Planning

We work closely with you to design beautiful, functional landscapes that fit your style and budget.

Garden Maintenance

Keep your garden looking its best year-round with our professional maintenance services.

Seasonal Services

Prepare your landscape for each season with our specialized services, including spring and fall clean-ups.