Timberwolff Construction, Inc., A Gray Company

In 2014, Timberwolff Construction, Inc. joined Gray, bringing more than 25 years of retail experience and a variety of strong customer relationships to the Gray family. The companies joined forces due to similar values and the growth opportunities for all parties involved. Located in Upland, CA, Timberwolff provides engineering, design, and construction services to the Commercial market.


1659 W Arrow Rte.
Upland, CA 91786
Fax: 909.949.8500


Mike Wolff
President, Timberwolff Construction, A Gray Company