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A full-service window and door dealer in San Marcos, CA

Quality Windows, Doors, & Hardware in San Diego, CA

Welcome to General Millwork Supply, Inc., Committed to providing excellent customer service at competitive prices with over 50 years of experience in the building industry. Family owned and operated by Tom and Wendy Duran since 1991, specializes in selling quality national brand-name windows and doors to homeowners, building contractors, architects and designers.

Benefits of High-Quality Products

When you come to General Millwork Supply, Inc., we can help you achieve:

  • Consumer education and personalized service
  • Accentuate the natural beauty of your home
  • Obtain energy savings with new energy-efficient windows and doors
  • Increase the resale value of your home
  • Learn about the features and benefits of our products all backed by manufacturer's warranties.

Only the Best Products

Being the best brand-name products in the industry, many choices of styles, sizes and options are offered from the best manufacturers with excellent warranties and the highest level of service available.

We Are A Premier Vendor of the Following Manufacturers:


  • Art Glass Millworks
  • Andersen
  • Eagle
  • Jeld-Wen
  • Marvin
  • Marvin Integrity
  • Milgard
  • Ply Gem
  • Hy-Lite Block


  • AAW Inc.
  • Art Glass Millworks
  • Plastpro
  • Simpson
  • TM Cobb
  • Therma Tru
  • La Cantina
  • Krosswood


  • Solar
  • Solartube
  • Velux


  • Baldwin
  • Emtek
  • Fusion
  • Schlage


  • El & El Wood Products
  • MDF & Ultralight
  • Fingerjoint
  • Clear Pine
  • Hardwoods
  • Fypon

Large Selection for Every Architectural Style

We offer a wide selection of products to choose from, available in styles that are sure to complement your decor and architecture.

  • Interior Doors: Bi-fold, louver & café doors, pocket frames and doors, wood, masonite, sliding closet doors, mirror wardrobe doors and French doors
  • Exterior doors: Entryway, exterior wood & fiberglass, bi-fold, lift & slide doors, patio, security screen and French doors
  • Windows: Aluminum, vinyl, fiberglass, custom clad wood and replacement energy efficient windows
  • Skylights: Fill your rooms with natural light
  • Moldings and hardware: Find just the right accent for your doors and windows
  • Custom orders: Most products are made to order to your specifications

Our Service Areas

General Millwork Supply, Inc. is conveniently located in the heart of San Marcos, CA. We are pleased to provide service to all the communities in San Diego County.

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