What does Illinois’s ten-year construction act-based provision measure?

Identify the particular covered act or omission and its actual date.

Establish actual or reasonable discovery separately from the act date.

Check whether discovery preceded the ten-year expiration and whether disability, a longer promise, fraud or environmental-asbestos injury changes the rule.

1. Identify the particular covered act or omission and its actual date.
2. Measure ten calendar years from the covered act or omission. Separately measure the discovery period. Subsection (b) preserves a full four years when discovery occurs before ten-year expiration, so that qualifying claim can remain timely beyond this component.
3. Check the final weekend, statutory holiday and the proper court’s actual calendar.
4. Preserve the act and discovery chronologies and establish the actual applicable commencement boundary before filing. Keep any express promise, bond, disability and fraud evidence relevant to the selected branch.

Section 1.11 excludes a final Saturday, Sunday or statutory holiday and consecutive excluded days. Section 17(a) of the Promissory Note and Bank Holiday Act includes Pulaski Day, Good Friday and the general election for members of the House of Representatives. Check proclamations, the proper court’s actual calendar and clerk access separately. The bundled Illinois calendar covers 2026 and 2027.

Fictitious example

Use the nominal ten-year act-based component and separately establish discovery and statutory exceptions. Do not treat this output as the final claim deadline when the full-four-year guarantee or another qualification applies. Fictitious statutory event, independently established under the precise scope stated in this guide. Use the nominal ten-year act-based component and separately establish discovery and statutory exceptions. Do not treat this output as the final claim deadline when the full-four-year guarantee or another qualification applies.

Fictitious nominal ten-year component only. The full-four-year guarantee and potentially earlier discovery period are separate. This output is not an absolute final claim deadline.

The full-four-year guarantee can outlast this output

Subsection (b) expressly guarantees no less than four years under (a) for discovery before ten-year expiration. A nominal ten-year date alone cannot decide that claim’s last filing date.

The discovery period can also expire sooner

Subsection (a)’s four-year knowledge period remains relevant. A claim discovered early does not automatically remain open until the tenth year.

A longer express promise is preserved

Subsection (d) permits the stated action against a defendant who expressly warranted or promised the improvement for a longer period, within that promised period.

Fraud and qualifying disability require separate review

Subsection (e) excludes causes arising from fraudulent misrepresentation or concealment. Subsection (c) addresses inability to sue solely because of minority, developmental disability or mental illness.

Environmental-asbestos injury is excluded from subsection (b)

Subsection (f) excludes actions for personal injury, disability, disease or death resulting from environmental discharge of asbestos from this ten-year provision.

• This calculation does not determine whether relief is available or whether the facts satisfy the statute.
• A current statutory edition does not establish the law for every historical claim. Preserve the applicable edition and actual orders.

• Identify the particular covered act or omission and its actual date.
• Establish actual or reasonable discovery separately from the act date.
• Check whether discovery preceded the ten-year expiration and whether disability, a longer promise, fraud or environmental-asbestos injury changes the rule.
• Subsection (b) expressly guarantees no less than four years under (a) for discovery before ten-year expiration. A nominal ten-year date alone cannot decide that claim’s last filing date.
• Subsection (a)’s four-year knowledge period remains relevant. A claim discovered early does not automatically remain open until the tenth year.
• Subsection (d) permits the stated action against a defendant who expressly warranted or promised the improvement for a longer period, within that promised period.
• Subsection (e) excludes causes arising from fraudulent misrepresentation or concealment. Subsection (c) addresses inability to sue solely because of minority, developmental disability or mental illness.
• Subsection (f) excludes actions for personal injury, disability, disease or death resulting from environmental discharge of asbestos from this ten-year provision.
• Preserve the act and discovery chronologies and establish the actual applicable commencement boundary before filing. Keep any express promise, bond, disability and fraud evidence relevant to the selected branch. File with the proper clerk in the required format. Rule 9 ordinarily requires civil electronic filing, subject to its exceptions and exemptions. Rule 9(f) ordinarily requires submission before midnight in the court time zone unless a statute, rule or actual order specifies a different time. A submission on a closed clerk day ordinarily receives the next open-day stamp. Preserve the actual electronic file mark, receipt and any filing-relief order. Filing and service are distinct acts.