Last year real-estate experts predicted that 2018 should continue to be a good year for U.S. homeowners, while some caution that home values could begin to level off. 

What makes some real-estate markets healthy, and others not? Factors such as inventory, foreclosure activity, past and projected evolution of home values, negative equity and delinquency, and whether homes are currently selling faster or slower than in the past indicate the health of a market, according to Zillow's Market Health Index methodology.

This list is based on the 'real estate health' ranking from a WalletHub study. The study crunches data from 179 U.S. cities on home turnover rate, housing market health, days on market, list price vs. sale price, share of home flips, building permit activity and WalletHub's 'Fastest Growing Cities' ranking. This list includes only the city proper, not the entire metro area.

We also added the market health score from Zillow. The negative equity figures, listing price per square foot and median sales prices are also from Zillow.

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