房子 (fángzi) is a common noun meaning "house" or "building." It refers to a residential structure and is one of the first words learners encounter. For example, 这是我的房子 means "This is my house."
他们在郊区买了一栋房子。
Tāmen zài jiāoqū mǎi le yī dòng fángzi.
They bought a house in the suburbs.
这栋房子看起来很旧了。
Zhè dòng fángzi kàn qǐlái hěn jiù le.
This house looks very old.
我小时候住的房子已经拆了。
Wǒ xiǎoshíhòu zhù de fángzi yǐjīng chāi le.
The house I lived in as a child has already been demolished.