The Hinckley Big Rock Community Unit School District 429 district serves all or some of: Big Rock and Hinckley. Hinckley Big Rock Community Unit School District 429 currently has 15 single family homes for sale with an average list price of $548,858.67 and 1 condo for sale with a list price of $220,000 that attend the district. The average annual property tax for Hinckley Big Rock Community Unit School District 429 is $6,036.95.