Jack - taxes can vary widely in Illinois even within the same township. Many different taxing bodies make up the tax bill, and such items as municpal tax rates, school and park districts, fire and road districts, libraries, forest preserves, even lawsuits can affect what taxes are paid...along with the assessed value of the individual home.
Therefore, we do not have an across-the-board estimate of taxes in any township. Existing homes may be over assessed and paying disproportionately high taxes; they may be underassessed or have senior tax exemptions or assessment freezes in place.
It's always best, when looking for real estate in an area (especially one that is new to you) to have an experienced real estate agent help guide you through the process. You can also, if you have a particular address, contact the assessor for the township in which that home lies and ask the current assessed value and the last known published tax rate for that parcel. Homes right across the street from each other in Lockport may belong to different grade school districts, and that can make one house higher in tax than a virtually identical home in another district.
If you're looking for assistance and considering moving to our area, please don't hesitate to contact me for house hunting help or further clarification of how our taxes work.