The time it takes to sell a Chicago-area house has been getting shorter each year, thanks to both a slim inventory for buyers to choose from and rising interest rates, according to data pulled by a northwest suburban real estate executive.

In the 12 months ending Nov. 1, single-family houses that sold had been on the market 84 days on average. That’s down 6 percent from the previous 12 months and down more than 14 percent from five years ago.