Fannie Mae and Freddie Mac held 37 percent ($467 billion) of all mortgages on multifamily properties outstanding as of Sept. 30, 2017, according the Federal Reserve data.

In fact, most of the growth has taken place in suburban submarkets.

Developers are making room for amenities like dog runs and swimming pools—sometimes on the rooftops of urban high-rise towers.

The cost of materials important to the construction of apartments rose 3.6 percent over the year that ended in September, according to the producer price index from the Bureau of Labor Statistics.

Westfield is the latest in a string of mall developers and landlords whose firms have begun adding non-retail uses to existing retail properties.

There is a burgeoning trend among developers across the U.S. to bring the use of wood to new heights in commercial real estate.

Many renters have already been pushed to the limit financially. Another rent hike could force them to move out.

Here are a few of the top worries for today’s multifamily investors.