The real estate industry can be divided in several different ways. One approach is BY INDUSTRY ACTIVITIES:
Another way is to divide by type of REAL ESTATE INDUSTRY SECTORS
Much of our online information focuses on real estate as an investment (REITs/real estate investment trusts).
For general overviews and market research reports search on terms like: COMMERCIAL, RESIDENTIAL or INDUSTRIAL. Combine "REAL ESTATE" with terms like INDUSTRY, SALES, BROKERAGES, INVESTMENTS, ASSETS, MANAGEMENT, APPRAISAL. Other related terms include: Construction, Housing, or REITS.
Data-Planet Statistical Datasets offers US Census data for Housing & Construction; you will also see Zillow offers various housing metrics (e.g. values, sales, rental pricing, foreclosures, price per square foot) down to the Zip Code level.
When you open Data-Planet Statistical Datasets, select 'Browse By Subject' at the left side of the page, then expand on 'Housing & Construction'.