Yes, adding a built-in or custom closet generally increases your home's value and makes it more attractive to potential buyers. A well-designed closet adds utility, organization, and a touch of luxury, which are appealing selling points. Most homeowners see a return on investment (ROI) of 50% to 60%; for example, a custom closet can add about $1,000 to your home's value on average. The specific ROI depends on the type, with custom walk-in closets typically providing more value than reach-in closets. However, to maximize value, ensure the closet doesn't significantly detract from the room's usable square footage. Converting an entire room into a closet can actually lower your home's value. Similarly, using overly lavish materials may not recoup their cost. A good strategy is to add a closet that takes square footage from a non-living area, such as a garage, to create a mudroom closet.

A foyer or entryway is typically a formal landing area for guests, located at the primary entrance of a home. It is often more formally decorated and connects directly to the main living space. In contrast, a mudroom is a more casual, utilitarian room, usually leading in from a secondary entrance like a garage or the side or rear of the house. It serves as a space for residents to remove shoes and outerwear to keep mud, dirt, and water out of the main home.

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.

To prevent sagging, consider both the material and the span of the shelf. Using sturdy materials such as plywood or solid wood can provide better support than particleboard. Additionally, limiting the shelf span to 36 inches or less can reduce the risk of sagging. For longer shelves, incorporating center supports or brackets can offer additional reinforcement.