Tiefel Property Group Categories Commercial LeasingResidential Development P.O. Box 17130 Boulder CO 80308 (303) 665-9390 303-665-0165 Send Email About Us Commercial Leasing and Residential Development. Rep/Contact Info Dianne Bush × Dianne Bush Phone: (303) 665-9390 Fax: 303-665-0165 Send an Email P.O. Box 17130 Boulder CO 80308 Doug Tiefel × Doug Tiefel Phone: (303) 665-9390 Send an Email Share × Print Email Facebook Twitter LinkedIn Tell a Friend ×