About us

Who we are

A & D Quality Construction Co., LLC, is a General Contracting firm licensed in the State of Washington since 1991. The company is owned and operated by Keith Demps Sr. and Annette Demps. A & D performs infrastructure services in both the private and public sectors.

Past private projects consisted of acquiring and developing land to build tracts of single-family homes, apartment complexes, churches, and mixed-use residential/commercial buildings.

Projects normally ranged in size from $300,000 to $3,000,000.

A & D has expanded its services into the public works sector. Their self-performing scopes consist of, demolition, excavation, clearing, grading, concrete, underground utilities, and tenant improvements.  A & D has completed projects for the Federal Aviation Administration, U.S. Army Corps of Engineers, Sound Transit, Bonneville Power Administration, and several others.

A&D currently has the ability to bond single projects in excess of $4,000,000 with an aggregate of $5,000,000.