G4 Inspection Services » Find an Inspector G4 Inspection Services G4 Inspection Services Contact: Karl Neuffer Work 1420 NW Gillman Blvd STE 2764 Issaquah WA 98027 work Work Phone: 425-441-8649work Cell Phone: 425-223-0764cell Work Email: [email protected]INTERNET Website: Visit Us Categories: King, Pierce Updated 2 years ago.