No, odds are your parents didn't buy a house in their 20s. Certainly it wasn't common. And once they did, it was likely a small house. And it's starting to piss me off that young adults think it was common.

• We (GenX) were 30 in a MCOL area, but with very good paying careers.
• My (boomer) parents were 35 when they finally got to buy a house in a LCOL area - and it was a real fixer upper that hadn't been lived in for 2 years.
• Their (Silent/Greatest) parents didn't buy a house until they were in their mid-30s in a M/HCOL area. On my mom's side it was a 800ish sqft duplex with 1 bathroom where they raised 3 kids. Father's side hadbit more room (maybe 1300ish) but still 1 bathroom and 3 kids.

And up to the point where we did buy a house, I always lived with roommates. There was only a couple month period where I ever lived by myself in an apartment, and it was a stretch, and I was glad (financially anyway) when I got a roommate again.

Neither of my parents ever lived alone l. They lived at home until they got married and rented together. Same for all my grandparents.