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Resident says developer’s tax-revenue estimate for proposed 91 townhomes is incorrect; mayor says figures were developers’ estimates

Warrenville City Council · November 4, 2025
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Summary

Bob Siebert questioned a developer-provided estimate that 91 townhomes would raise $115,000 annually in city property taxes, presenting alternate per-unit calculations and urging the city to provide accurate information; the mayor clarified the numbers came from the developer, not the city.

Bob Siebert of Albright Court used citizen comment time to challenge a published estimate that a proposed 91-unit townhome project would add $115,000 in annual property tax revenue to the city.

Siebert walked the council through arithmetic and equalized assessed value (EAV) calculations, arguing that the developers' per-unit tax figures—published in a local 'Hometown Happenings' piece—do not match the taxing-district relationships he calculated from an example tax bill. He said the correct per-unit increase to city revenue would be smaller than the developers' number and called for clearer, accurate information to be shared with residents.

"This is an error you will see by 100%," Siebert said, asking the city to avoid sending vague or developer-sourced numbers as though they were city estimates. The mayor responded that the figures in the publication were developers' estimated annual tax revenues and not official city numbers.

Council did not take formal action on the comment during the meeting; the exchange was recorded in the minutes and the mayor's clarification stands as the official city response given at the meeting.