You can modernize an old-looking closet by just painting it, but beyond that, consider electric elements like recessed or accent lighting. If this is a large and deep closet, you can consider adding an island to the middle or a nice ottoman on a rug. Luxury closets will have even more items, like felt-lined drawers for watches and jewelry, in-wall safes, electronic shoe storage, or a tablet catalog of their items.

The vertical space between closet shelves depends on what you're storing. For clothing like shirts and sweaters, 10 to 12 inches is enough. Towels and linens need 12 to 15 inches, while tall storage bins may require 18 inches or more. Overcrowding your shelves can reduce accessibility and increase clutter, so be sure to leave breathing room for your items.

Closet design services include help designing and laying out your closet for maximum utility, visual appeal, and return on investment. Many closet designers can also include the carpentry required to construct your custom closet. You should speak with your designer beforehand to determine what services are included in the estimate, and prepare to lay out additional funds for materials or labor as needed.

Walk-in closets are always the biggest and can easily be more than 100 square feet. Primary bedroom closets, even if not walk-ins, are the second largest category in most homes and sit between 30 and 80 square feet. Linen closets, utility closets, and built-in closets are smaller and, depending on their usage, tend to be between 10 and 50 square feet.