Here is the minimum that you need:(posted 8117 days ago)Two long tables, one for a dry area (enlarger and an adjacent space for handling paper and negatives) and one for a wet area (your trays).
A safelight.
Enlarger.
Timer.
Three trays for developing, stopping, and fixing.
A container for rinsing prints.
A sink somewhere near (mine is across the basement from my darkroom area.
An area to dry your prints.
Some shelves for storing chemicals and supplies.
The table for the enlarger should be sturdy enough to minimize shaking when you are exposing prints.