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Century-old agriculture firm breaks ground on corporate campus in Modesto, California

Four-story office building will anchor mixed-use project in Kiernan Business Park
JS West & Cos.' planned headquarters building, Kiernan & Dale, is expected to be finished by July. (JS West & Cos.)
JS West & Cos.' planned headquarters building, Kiernan & Dale, is expected to be finished by July. (JS West & Cos.)
By Tyreque Thompson
CoStar Research
August 11, 2026 | 6:05 P.M.

JS West & Cos., a major producer of eggs and propane in Northern California that traces its roots to 1909, has broken ground on a four-story, 60,000-square-foot office building in Modesto. The project, known as Kiernan & Dale, sits at Dale Road and Kiernan Avenue within the Kiernan Business Park Specific Plan and is expected to be completed by July 2027.

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