I wish I new how that article got to 80k for a house in 1955.. I couldn't find a link to trust "interactive visualisation" they're citing and Google didn't help me either.

I wasn't born then, so no personal experience and everything I could find pointed more towards 5-10k, i.e. this advertisement

https://i.redd.it/75sc90f58qsa1.jpg

That'd be safely below 100k, inflation adjusted... Actually, maybe that 80k is already inflation adjusted? The number is pretty close