Sunset Ridge School District 29, Northfield and Northbrook, is seeking $23.5 million in funding to renovate Middlefork School in Northfield, one of two elementary schools in the district. The referendum, on the March 17 Cook County Primary Election ballot, would allow the district to borrow money to fund the partial rebuild and infrastructure upgrade of the K-3 school. If approved, property taxes would increase based on home market value. The owner of a $500,000 home could expect an annual tax increase of $444, while a $1 million home would have to pay an extra $920 in property taxes. Two other referendums, for a fire protection district and a park district, are also on the ballot in this area and, if passed, would each raise property taxes an additional amount. The project is expected to cost about $40 million in total.