Landau Associates, Inc. Share: Environmental EngineeringGeotechnical EngineeringHazardous WasteHydrology/Hydrogeology Landau Associates, Inc. Visit Website 155 NE 100th Street Suite 302 Seattle, WA 98125, WA 98125 (206) 631-8680 (425) 778-3650 (fax) Map What's Nearby? Distance: 5 10 15 20 25 50 mi.