Thousands of Metro Atlanta homeowners got a nasty shock recently when property tax appraisals arrived in the mail.

Residential property assessments are up sharply this year. But values rose much faster in some communities than others, a city-by-city analysis by The Atlanta Journal-Constitution found. That could mean big property tax increases for tens of thousands of homeowners.

Values rose 20 percent or more in Decatur, Stone Mountain, Palmetto and other communities, the newspaper found. Cities from Dacula to Alpharetta to Jonesboro also saw double-digit increases.

Here are the cities in five core metro counties where the tax increased the most by percentage.

• Clayton: Lovejoy (11.1 percent)

• Cobb: Powder Springs (15 percent)

• DeKalb: Clarkson (39.5 percent)

• Fulton: College Park (37.2 percent)

• Gwinnett: Dacula (18.7 percent)

Click here to see an interactive map of property tax changes from 2014 to 2015 for Clayton, Cobb, DeKalb, Fulton and Gwinnett counties