Head Office & Showroom:
5864 Interface Drive Ann Arbor MI 48103
734 709 3566
otenzia@germansystemwindows.com
Open: BY APPOINTMENT ONLY
Please call to schedule appointment.
Sundays & Holidays: Closed
Showroom Michigan Design Center:
1700 Stutz Dr Suite 25, Troy, MI 48084
info@germansystemwindows.com
Open M-F: 9am – 5pm
No appointment needed
