The statute of limitations [2] for intrusion claims in Illinois is 1 year. See 735 ILCS 5/13-201 [3]. Intrusion claims are governed by the same limitation period that is used for libel, slander and defamation actions.
Links
[1] https://www.dmlp.org/legal-guide/illinois/illinois-statute-limitations-intrusion-claims
[2] https://www.dmlp.org/legal-guide/statute-limitations-intrusion
[3] http://www.ilga.gov/legislation/ilcs/ilcs4.asp?DocName=073500050HArt%2E+XIII+Pt%2E+2&ActID=2017&ChapAct=735%26nbsp%3BILCS%26nbsp%3B5%2F&ChapterID=56&ChapterName=CIVIL+PROCEDURE&SectionID=62511&SeqStart=98700&SeqEnd=101900&ActName=Code+of+Civil+Procedure%2E
[4] https://www.dmlp.org/jurisdiction/united-states/illinois
[5] https://www.dmlp.org/subject-area/intrusion
[6] https://www.dmlp.org/subject-area/statute-limitations