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CompBasis

Guides

Illinois property-buying topics where the numbers come from the same public data the analysis pipeline itself uses — not generic advice.

What Your Property Taxes Actually Become After Buying in Cook County

Cook County doesn't reset assessed value at closing -- it's a triennial reassessment by township. Here's the actual mechanism, the real assessment ratio and equalization factor, and how to estimate your first-year bill.

Buying a House in Illinois Without a Realtor: What Actually Happens

Illinois is an attorney-review state. The 5-business-day review period, earnest money, mortgage contingency, and closing sequence -- and why you need an attorney before you have an accepted offer, not after.

Chicago Zoning: How Many Units Can You Legally Have?

Chicago zoning districts don't cap unit count with a flat number -- they set a minimum lot area per unit, and by-right density falls out of the math. The real per-district figures, the formula, and where the estimate falls short.