Dan Berk and Robert Olsen, Significant Other’s co-writers/directors, laughed at the thought that fans might think that they built the large forest as a set for Significant Other during an Entertainment Weekly interview.

Robert explained that even the forest areas in the northeast neck of the American woods (where he’s from), simply didn’t compare to the forests of the Pacific Northwest. Dan joked, “The Northwest woods were like, ‘I AM WOODS.'”

Source: https://www.distractify.com/p/significant-other-filming-location