Measure the interior of the space. Use a tape measure or ruler to define the exact square footage. Allow at least 3 feet of margin for opening a car door, whether spacing one or more cars. Leave room on the garage's back wall and side walls for shelving or cabinets. Allow at least 18 inches of space between a closed garage door and the back bumper of a parked car.
Utilize part of the wall shelving area for a workbench. Designate 5 or 6 feet of linear space to hold a workbench for repairing small items or doing woodworking. Consider fitting a workbench into an L-shaped corner space of the garage as well. Add cabinets over the counter area to store tools, paint or building materials.
Plan to use the ceiling area in unique ways. Take advantage of ceiling height that is 9 feet or taller. Use special accessories to create racks for storing lumber or a canoe, for example. Don't overlook running plumbing pipes through an attic area, if a bathroom will be part of the layout.
Buy cabinet systems for floor-to-ceiling storage. Plan to give the garage a polished look by buying cabinets in a special color scheme or material. Buy these designer cabinet systems as kits that are assembled on site. Incorporate pre-made cabinets from a home improvement store or recycled cabinets, if the budget is limited. Give recycled cabinets a uniform look by painting them all one color, such as white or gray.
Add special accessories to the garage layout, if the garage leads directly into a house. Secure a metal hanging rack for coats, for example, near a kitchen entrance door. Install pegs for holding school backpacks or a rack for shoes and boots to create a mudroom as part of the garage.