It wasn’t until 2019, 10 years after the Great Recession ended, that the percentage of houses with mortgages that had negative equity had returned to “normal” levels, ~3%.
76 Secrets of U.S. Home Ownership – Table of Contents
Secret #55 – 17% of ALL U.S. Home Owners with Mortgages Were Still Underwater 5 Years AFTER The End of The Great Recession