HK is far and away the #1 least affordable housing market ranked by housing cost divided by median income.
18 years of the current median income is required to buy a home in HK.
That is your entire income going towards housing for 18 years if you don’t eat, use electricity, pay taxes, etc.
Not including interest on a mortgage.
Sydney Australia is in second place with 13.3 times their median income.
Vancouver, Canada is third with 12.0
To be honest, I’d like to see the rest of the world’s countries/cities. I doubt they are truly alone in the map, and I’d like to see by how much are these ahead.