The original $15 million expense when taxpayers approved upgrades to it and five other Unit 4 schools in 2016 was bumped to $25.1 million in March, when the school board expanded the scope to include heating and electrical updates, sprinklers for fire protection and plumbing updates. CHAMPAIGN — Construction at 105-year-old Edison Middle School is still a year away, but officials say the multimillion-dollar project is projected to stay within its recently revised budget. read more