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.

The time it takes to build a closet varies widely depending on the project's size, complexity, and level of customization. On average, construction can take anywhere from a few days to two weeks.

A simple reach-in closet might be completed in less than a day, while a more complex walk-in closet could take one to two days or more. A typical project often falls in the 2-to-5-day range. However, a large, highly customized walk-in closet that requires structural changes, like moving a load-bearing wall, will take significantly longer.

A professional contractor can provide the most accurate time estimate for your specific project. If you are planning a DIY build, it is best to budget additional time.

Although you can complete a closet frame in just an afternoon, finishing the entire closet will take a few days to a week. However, that’s still not as much as the average time it takes to remodel a closet, which can take anywhere from several weeks to more than a month. That’s because you also have to consider the time it will take to demolish the existing space, plan a new design, order materials, and actually install it. 

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.