On a recent evening, more than 300 homeowners who are worried about their rising property tax bills filled First Unitarian Universalist Church in North Austin for a town hall meeting. If something doesn’t change, many said, they will soon be priced out of their homes. Two nights later, a similar discussion played out in South Austin, where homeowners gathered at Grace United Methodist Church in Travis Heights to talk about what can be done to slow escalating residential tax values. “I’m at the breaking point,” said Gretchen Gardner, an Austin artist who bought a 1930s bungalow in the Bouldin neighborhood...