It can, especially if it's a well-built, attractive building that matches the property. A quality shed or garage in the backyard is a real selling point when it comes time to list. Buyers notice it. Realtors notice it. It signals that the homeowner took care of the property and invested in practical upgrades.
Will you get 100% of your money back dollar for dollar? That depends on the market and the buyer. But a clean, functional outbuilding almost always makes a property more appealing and can absolutely tip a buyer's decision in your favor. Compare that to money spent on a storage unit, which adds zero value to anything.
