Doors have come a long way in their ability to enhance the look and style of your home. Let your doors reflect your personal style. Explore the colors, styles, and options 415 Design + Build has available for any new home or restoration project. Whether you are an architect, builder, or homeowner looking for superior doors.. 415 Design + Build works with the most beautifully made entrance doors, interior doors, exterior, patio, french, windows, custom millwork, and more.