In the August episode of Google SEO Office-Hours, someone asked if it is ok to use the product rich snippets for real estate properties. John Mueller checked on the answer for this with the team and found that real estate is unsupported in Google Shopping. If you look at the unsupported content Merchant Center help article, it lists immovable objects - like real estate - as unsupported.
So what will happen if you have added the product structured data for your real estate listings? Google will just ignore it. It is not seen as abuse, but it still has no effect.
Mueller recommends using structured data that has a visible effect on search. For more details on structured data formats that Google supports, check out this documentation.
Watch the SEO Office hours episode here –