房产 (fángchǎn) is used in more formal, official, or financial contexts. You'll encounter it when discussing the market, signing legal documents, or talking about investments.
Formal & Economic Discussions: News reports, bank documents, and economic analyses will always use 房产 or the related term `房地产 (fángdìchǎn)` (the real estate industry).
Legal Context: When you buy a home, you receive a `房产证 (fángchǎnzhèng)`, the official property deed. All legal matters related to ownership use this term.
Everyday Conversation: While people use 房产 when talking about their assets (“My only asset is my property”), they are more likely to use the casual word `房子 (fángzi)` when talking about the physical place they live. For example, “Come over to my house!” would use `房子`, not 房产.