How to Appeal Your Downers Grove Township Property Taxes (Before November 2nd)
If you live in Downers Grove Township—whether you’re in Hinsdale, Clarendon Hills, Downers Grove, Burr Ridge, or Darien—it is officially tax assessment season. You have roughly 30 days before the November 2nd deadline to review your property’s assessed valuation and file an appeal if you're paying more than your fair share.
Checking your assessment takes just a few minutes, and doing it every year is one of the smartest ways to keep your home's holding costs in check.
Here is a step-by-step guide to navigating the appeal process.
Step 1: Verify the Factual Record for Easy Wins
Start by visiting the official Downers Grove Township Assessor’s website and looking up your property using your address or Tax ID (PIN) number.
Before diving into market values, inspect the physical details of your property tax record:
Square footage of the living space
Square footage of the lot
Year built / age of the home
Finished basement status or extra amenities
The Quick Win: If you find factual inaccuracies in your favor—for example, the township lists your home at 3,500 square feet when it’s actually only 3,000—contact the assessor’s office directly. When presented with clear factual errors, they will often make an immediate adjustment right on the spot without requiring a formal, drawn-out appeal process.
Step 2: Do the "Rule of 3" Math
Next, locate your 2026 Assessed Valuation on the site. To understand what the assessor thinks your home is worth on the open market, multiply that number by three:
Assessed Valuation times 3 = Estimated Market Value
Example: If your 2026 assessed valuation is $300,000, the assessor estimates your home’s fair market value at $900,000 ($300,000 times 3).
Crucial Timing Detail: That $900,000 estimate reflects what the township believes your home was worth as of January 1, 2026—not today’s market value. If you decide to appeal based on market value, your evidence (such as closed comparable sales) generally must have closed prior to January 1, 2026.
Step 3: Choose Your Appeal Method
If your property's estimated market value ($900,000 in our example) is higher than what the home was realistically worth on January 1, 2026, you have a solid case for an appeal. You have two main pathways:
Method 1: The Valuation Appeal (Most Popular)
To win a valuation appeal, you need to prove your home's true market value was lower than the assessor’s calculation as of January 1, 2026. You can execute this in one of three ways:
Do It Yourself: Gather closed comparable sales (comps) that pre-date 1/1/2026 and prepare/submit the paperwork directly.
Hire an Appraiser: Pay a professional real estate appraiser to conduct an assessment tied to the 1/1/2026 effective date, then use their report to file your appeal.
Hire a Tax Appeal Attorney: Enlist a property tax attorney to handle the research, evidence gathering, and filing on your behalf (typically for a contingency fee based on your tax savings).
Method 2: The Inequity Appeal
An inequity appeal argues that similar or superior properties in your neighborhood (larger square footage, better build quality, bigger lots) are being assessed at lower valuations than yours as of January 1, 2026.
While valid, this method is significantly more labor-intensive and difficult to prove than a standard valuation appeal. Most homeowners stick to the valuation method to avoid the added complexity.
Don't Wait—The Clock Is Ticking
Reviewing your assessment every single year is smart homeownership. If you plan to file an appeal for Downers Grove Township, all documentation must be submitted to the assessor's office no later than November 2, 2026.
If you need help in choosing a tax protest attorney-just ask-we are always happy to help our neighbors gather the data they need!