Premier One Improvements, Inc. is a window replacement and sliding glass door installer based in Anaheim, CA. Serving Orange County, Riverside County, and Los Angeles County, they specialize in custom entry doors, energy-efficient windows, patio sliders, and various door styles including iron, French, Dutch, and folding doors. Established in 2004, this family-owned company offers tailored solutions designed for each home, with over 25 years of combined experience in the industry. Their capabilities include custom iron door conversions with wrought iron inserts, providing both aesthetic appeal and functionality.

D P Door Company, Inc. is a door and window specialist located in Fontana, CA, serving the surrounding area with a wide range of door installation and repair services. They offer sliding glass door repair, window replacement, and installation of various door types including lift and slide patio doors, folding patio doors, pivot entry doors, and security doors. With over 40 years of experience since 1977, the company provides expert craftsmanship and bespoke design solutions led by the CEO. Their team is known for handling complex door installations and large-scale projects, including overhaul repairs of giant lift and slide doors.