My sister works as a real estate broker, and she quietly tipped me off that when buying secondhand homes, you definitely want to buy ones that someone else has lived in for at least three years or more—the kind where the owner is selling because something came up. She strongly warned against buying those quasi-new secondhand homes with less than a year of occupancy! She says most of them probably have serious usage issues or poor living experience. Some are due to troublesome neighbors and noise. Others have poor lighting, so the owner got depressed and sold the place.

Last summer, I accompanied her to show a client a property, and I finally understood what she meant. The client had just gotten married and wanted a "quasi-new" home, thinking a place lived in for a year or two would be both new and affordable, saving on renovation costs. My sister tried to persuade him at first: "Quasi-new homes look good, but you can't see the hidden problems inside. Why not check out homes lived in for three to five years? The owners know the place inside and out, and any issues would have already surfaced." Xiaoli didn't listen and insisted on finding properties with less than a year of occupancy. My sister had no choice but to take him to see a fully renovated apartment in the economic development zone—the owner claimed it was an "urgent sale due to work transfer," lived in for only eight months, with all appliances and furniture included, asking price 1.18 million. Xiaoli fell in love at first sight and signed a letter of intent with the owner that same day.

Three months later, Xiaoli complained to my sister, saying he was "kicking himself for the decision." Turns out the apartment looked bright because the owner specifically chose a sunny afternoon at 2 PM to show it. But when Xiaoli moved in, he discovered that in winter, from 10 AM to 3 PM, the living room got no sunlight at all—the first-floor spacing was nearly five meters narrower than what the developer advertised, and the building in front perfectly blocked the southern exposure.

In contrast, my sister helped another client named Wang find a much more reliable property last year. It was an older unit downtown where the owner had lived for six years before selling to help his son raise grandchildren up in Beijing. Asking price was 950,000. Wang initially thought the "old house" was a drawback. When my sister brought him to view it, the owner proactively said: "I've been comfortable living here, just getting on in years and don't want the hassle of moving. Look at the kitchen pipes—I just replaced them with a quality brand last year. The bathroom waterproofing was also redone. Even my downstairs neighbor, we know each other well—both retired teachers, very quiet in the evenings."

My sister later told me that in her case files, over 60% of secondhand homes sold within a year have "hidden problems"—either structural flaws like kitchens without windows or bedroom doors facing toilets, or inadequate community amenities like promised kindergartens never built or no nearby markets. Or like what Xiaoli experienced: noisy neighbors or poor lighting.

Why are homes where people have lived longer more reliable? My sister says once an owner has lived three years or more, they've figured out the house's "personality"—whether it gets humid in spring, leaks in summer, or stays warm in winter. These issues can't be hidden. If there were serious defects, the owner either would have fixed them already or sold earlier. They wouldn't wait this long to sell.

Have any of you encountered people who stepped into the "quasi-new" home trap? Or bought homes where someone lived for many years and found them especially comfortable? If you were choosing a secondhand home, would you prioritize asking how long the current owner has lived there?