General Millwork Supply is a full-service window and door dealer located in San Marcos, CA. We serve the entire County of San Diego and its surrounding areas. We have over 50 years of experience in the building industry. Family owned and operated by Tom and Wendy Duran since 1991, our company specializes in selling quality nationally known brand-name windows and doors to homeowners, building contractors and architects. Our company is proud to have one of the largest showrooms in San Diego County, displaying windows, doors, skylights, mouldings and door hardware to match virtually any architectural style and budget plan. Specialties General Millwork Supply offers a large selection of high quality wood, wood clad, fiberglass, vinyl and aluminum windows & patio doors, entry doors and skylights, including those from many manufacturers listed on our site under Our Brands. In addition, we supply exterior and interior doors, wardrobe doors, decorative moulding, door hardware, faux beams and many other specialty building products. We also offer products from many other manufacturers and can special order those hard to find or unusual items. If you dont see the product category youre interested in, call or drop us a line and well do our best to get you what you need. We are committed to providing you with the excellent customer service and prices you can afford. Improve your homes appearance while saving on heating and cooling bills with our quality windows and doors.