Property tax appeals in Proviso

The Cook County Assessor's own record of what happened to appeals filed on properties in Proviso township.

12.7%of appeals won a reduction 11.8%–13.7% at 95%

4,565appeals decided

6.6%typical cut, when one was won median over 580 reductions

Proviso against the county as a whole: a real difference of 4.0 points — 12.7% here against 16.7% county-wide.

Does hiring someone help?

Whether an agent helps is not settled here: the advantage has changed sides between years, ahead in 3 and behind in 2. A single combined figure would report whichever side the window happened to favour.

2021: +5.12022: +4.72023: +6.32024: -2.92025: -0.8

Each year: how many percentage points better an agent did than an owner filing alone. Negative means the owner did better.

Firms that file on your behalf commonly take a third of the first year's saving. This is the county's own record of how the two groups actually did.

The reasons the Assessor gave

Every decision carries a stated reason. These are the ones that appear most often on Proviso decisions, and how often each was attached to a reduction rather than a refusal.

Reason given	Decisions	Reduced
This is a result of a market analysis of your property as well as an analysis of comparable properties.	3,893	11.7%
This is due to an analysis of the actual sale transaction of the property.	213	0.0%
This is due to income, market or cost analysis supporting the assessment.	145	0.0%
This is due to your property's uniformity with comparable properties.	72	0.0%
This is due to a prior year Board of Review decision or reduction.	54	0.0%

A reason seen fewer than 30 times shows no rate, for the same reason a township with a handful of appeals shows none.

All Cook County townships →

Source. Cook County Assessor, published appeal decisions (dataset y282-6ig3). Counted, not modelled. Undecided appeals are excluded from rates rather than counted as losses. Rates carry a 95% Wilson interval and none is shown below 30 decided appeals.