Svenja Gudell of Zillow Gudell: “There’s a growing divide in the rental market right now.”

SEATTLE—The nation’s fastest growing apartment supply and its fastest growing rents may not coincide. Zillow said Thursday that median rents on lower end apartments are rising faster than median rent overall, based on an analysis of 15 multifamily markets. In 11 of those markets, rents for the least expensive third of apartments have seen double-digit annual growth.