When my mortgage was >20%, I was making $6 / hr.
I paid $32,000 for that house in 1986.
Same job today pays $35. Same house is ~$400,000.
MP. You need a wage price comparison too.
To have kept the same ratio that house will need to sell for $187K today or if the house was actually worth only $400K the job needs to pay ~$75/hr.
You also have to factor in interest rate in this or....just monthly payment (P+I) vs pay not just pay vs price.
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There are also other differences of course.
An almost entirely new class of home exists today, condos. While they have been around a long time but the popularity really started in the 80/90s and ramped up from there. Some will argue it is not apples to apples but having a new class changes the overall dynamic, is it the cause or was it caused...
Go back long enough and housing was paid for by a single income, today usually two. There is an entire discussion about basic supply and demand concepts here.
We also have a view here that people
need a house. In many parts of the first world the entire concept of just buying a detached home has been out of reach for many decades, sometimes longer. People buy small condos or property gets passed down...
And of course well covered, more people means higher prices unless supply can increase as fast as the demand (population).
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EDIT:
Factoring in Interest rate, assuming a "hated" boomer buying somewhere between 1975 and 1995 a typical interest rate of ~12%...
Buying at 32K then making $6/hr
Results in 420K today making $35/hr when factoring in today's sub 3% interest rates. Can be refined by knowing the actual 32K buy date.
Adding in the concept of dual income vs boomer single we hit affordability of ~800K (of course it is less as both may not make the full $35 and there will be time off when having kids...).