Two consecutive months of increases could hint at an easing of the state's housing supply issues after more than a year of declining inventory, said David Clark of Marquette University.
"These are peak months for closing on homes," Clark said. "To see some improvement in inventories, even in those high-volume months, is a suggestion that maybe we have turned the corner a little bit."
The limited supply of homes for sale has been driving up prices, he said. The median price of a home in July was $192,900, up 7.5 percent from July 2017.
Homeowners can be motivated to sell by rising home prices, according to Clark.
"We've seen pretty consistent upward movement in prices, and the increase in prices has put some incentive for new sellers to list their homes," Clark said.
Despite inventory rising last month, home sales dropped about 3 percent in July compared to July 2017. Home sales from January through July have declined about 3 percent from the same period last year.