Measure the closet space
Decide the closet layout
Gather materials and tools
Mark wall studs and reference lines
Cut shelves, panels, and supports to size
Install the closet frame or side panels
Secure the back panel if needed
Install the top shelf
Install additional shelves
Install hanging rods
Add drawers, bins, or organizers
Attach trim or molding
Fill nail holes and sand surfaces
Paint or finish the closet
Inspect alignment and stability