Karl Neuffer - Find an Inspector Karl Neuffer G4 Inspection Services Work 1420 NW Gillman Blvd STE 2764 Issaquah WA 98027 work Work Phone: 425-441-8649work Cell Phone: 425-223-0764cell Work Email: karl@g4inspections.comINTERNET Website: Visit Us Categories: King, Pierce, Snohomish Updated 2 years ago.