55 ILCS 5/5-32025
The judgments of the court shall be final as to all the issues involved, and the proceedings in the specified cause shall be subject to review by appeal as provided in this Division and not otherwise. However, by mutual consent such a judgment may be vacated or modified notwithstanding the expiration of 30 days from the rendition of the judgment, except as provided in this Division.
Such judgment shall have the effect of several judgments as to each tract or parcel of land assessed, and no appeal from any such judgment shall invalidate or delay the judgments, except as to the property concerning which the appeal is taken.
Such judgment shall be a lien on behalf of the county making any improvement, for the payment of which the special assessment is levied, on the property assessed from the date thereof, to the same extent and of equal force and validity as a lien for the general taxes until the judgment is paid or the property against which any such judgment is entered is sold to pay the judgment.
Nothing in this Division shall interfere with the right of the petitioner to dismiss its proceedings, and for that purpose to vacate such a judgment at its election at any time before commencing the actual collection of the assessment. The court in which the judgment is rendered shall enter an order vacating or annulling the judgment of confirmation on motion of the petitioner entered at any time after the expiration of 30 days from the rendition of that judgment of confirmation upon a showing by petitioner that no contract was let or entered into for the making of the specified improvement within the time fixed by law for the letting of the contract, or that the making of the improvement under the original proceeding was never commenced, or that the making of the improvement under the prior proceeding was never commenced, or that the making of the improvement under the prior proceedings was abandoned by petitioner. No judgment entered in such a proceeding so dismissed and vacated shall be a bar to another like or different improvement. However, after the contract for the work has been entered into, or the improvement bonds have been issued, no judgment shall be vacated or modified or any petitioner dismissed after the expiration of 30 days from the rendition of the judgment, nor shall the collection of the assessment be in any way stayed or delayed by the Committee, or any officer of the county without the consent of the contractor or bondholder.
The county may file a complaint to foreclose the lien of special assessment in the same manner that foreclosures are permitted by law in cases of delinquent general taxes. However, no forfeiture of the property shall be required as a prerequisite for such foreclosure.
55 ILCS 5/5-32025