Width really matters when you think about usability, not just space on paper. A 24’ span can handle two average-sized cars, but add a toolbox, bikes, or a small workbench and it feels crowded. Taller ceilings make a difference for garage door travel and headroom, especially if you plan a ceiling storage rack. Don’t forget vehicle overhang when doors are open — that eats into usable space. Measure everything and add a buffer so you’re not crammed every time you pull in.