AG Millworks is a custom door manufacturing company based in Ventura, Ca. specializing in designing, and manufacturing Custom Bi-Fold doors & windows, Swinging French Doors, Multi-Slide Doors, Lift-and-Slide Doors, Retractable Screen Systems, Entry Door Systems, Transoms and Pre-Finishing available as well. AG Millworks has been in business since 1986 and is a leader in the field of custom architectural millwork production. We manufacture and supply custom building materials for Building Contractors & Building Supplier Retailers. We supply top tier window and door dealers with our products and opportunity for them to sell custom designed Door Systems for their clients.