EVERY darkroom that I ever worked in had the sink too low for the average height of the users that shared it.

When the time came for building the cabinets for my darkroom sink, I propped up trays to the final height that was usuable for me... Now, I enjoy working at my sink... No more sore backs hovering over a sink that at the wrong height.

I'd have to measure it, but I'm sure it's at least 6" higher than standard counter height.... After all, you want to stand and work, not hunch over...