most DW door project 26-28" from the cabinet faces.

Some short tub Euro models are less and some American tall tub models are more.

Shouldn't really make a difference because your walk way needs to way more than that for day to day function regardless of whether you have a DW or not.

Thank you xedos! Opposite the dishwasher is going to be our island! And it's 36 inch walkway between! I had to make it that small because we needed the room on the other side of the island for seating! But it's a u shape around the island and the other sides are 42inch walkway!