Cook County property tax
Lemont Township property tax appeal guide
Your township: Lemont
Cook County Assessor
Deadline: September 29, 2026 · 10 days remaining Official Cook County Assessor source ↗
Board of Review
Current dates are not verified here. Check the official source. Official Board of Review source ↗
Lemont Township's Assessor appeal window is open now through September 29, 2026.
File with the Cook County Assessor · $0 filing fee ↗County calendar updated September 15, 2026.
Lemont Township extends beyond the village that shares its name, making the township designation the relevant one for the assessment calendar rather than the municipality used in a mailing address. It was reassessed for 2026 as part of the South Triad and is next scheduled for 2029. The Board of Review nevertheless opens a township window every year.
Evidence to review
- Reconcile the Assessor's separate land and building measurements with the available property records before selecting sales.
- Compare houses from a similar era and construction type, especially when newer homes or major rebuilds appear in the same search area.
- Account for lot shape, frontage, and site access when two parcels have similar recorded land area but function differently.
- Use date-stamped photographs and a concise condition log to distinguish longstanding defects from work completed after the relevant appeal year.
Official sources
Cook County Assessor calendar · Cook County Board of Review appeals
You file directly with Cook County for free. We provide optional research, not representation or guaranteed savings.
Editorial guidance reviewed 2026-09-19. Filing dates are checked separately.