Milton city officials said they learned this week the value of the city’s tax digest (the total value of all real property in the city) rose 6.5 percent in 2015.

Officials said the digest increase means the city is legally obligated to hold three public hearings and advertise a tax increase. But the city said the millage rate will not increase — it’s capped by law at 4.731 mills, and a majority of voters would have to approve a change.

The city said the increase is due to a combination of new development and re-assessment of existing real estate bringing in more revenue, with Fulton County tax officials saying some properties will see a higher tax bite, others a drop. Property tax bills will be sent by Sept. 1

The required public hearings are set for 6 p.m. Monday, as well as the same time July 20 and Aug. 3. All will be held in the council chambers at Milton City Hall, 13000 Deerfield Parkway.