Open Now Cook County Board of Review
Filing Closes: November 6, 2026
Evidence Due: November 16, 2026
West Chicago Township is currently open at the Cook County Board of Review through November 6, 2026 (with supporting comparable evidence accepted through November 16, 2026). Even if you did not file with the Assessor earlier this year, you have a full statutory right to appeal at the Board of Review.
Covered Communities & Neighborhoods: West Loop, Wicker Park, Ukrainian Village, East Garfield Park, West Garfield Park, Humboldt Park, Austin, Pilsen / Lower West Side, Near West Side, North Lawndale, South Lawndale (Little Village)
Open Now Cook County Board of Review
Filing Closes: November 6, 2026
Evidence Due: November 16, 2026
Northfield Township homeowners in Northbrook, Glenview, and Northfield can file their 2026 property tax appeal with the Cook County Board of Review through November 6, 2026, with supporting uniformity and sales evidence due by November 16, 2026.
Covered Communities & Neighborhoods: Northbrook, Glenview, Northfield, Techny, Deerfield (Cook County portion), Glencoe (portion), Wilmette (western portion)
Open Now Cook County Board of Review
Filing Closes: November 6, 2026
Evidence Due: November 16, 2026
Lyons Township is open at the Cook County Board of Review through November 6, 2026 (evidence deadline November 16, 2026). Single-family Class 2-03, 2-04, and 2-07 homes in La Grange, Western Springs, and Burr Ridge frequently show 12% to 22% building $/sq ft dispersion within the same Assessor neighborhood code.
Covered Communities & Neighborhoods: La Grange, Western Springs, Burr Ridge (Cook County portion), Countryside, Brookfield (southern portion), Hinsdale (Cook County portion), Indian Head Park, Willow Springs, Justice, Bridgeview, Summit, Lyons, McCook
Open Now Cook County Board of Review
Filing Closes: November 6, 2026
Evidence Due: November 16, 2026
Stickney Township is open for 2026 Board of Review appeals until November 6, 2026, with comparable evidence accepted until November 16, 2026.
Covered Communities & Neighborhoods: Burbank, Stickney, Forest View, Nottingham Park, Central Stickney, Clearing / Garfield Ridge border
Open Now Cook County Assessor
Filing Closes: November 12, 2026
Evidence Due: November 12, 2026
Jefferson Township is the largest residential township on the Northwest Side of Chicago and is open right now at the Cook County Assessor through November 12, 2026. Bungalows (Class 2-03) and two-flats (Class 2-11) on the exact same block often carry building assessments ranging from $11.50/sq ft to $18.50/sq ft.
Covered Communities & Neighborhoods: Portage Park, Irving Park, Albany Park, Avondale, Belmont Cragin, Hermosa, Jefferson Park, Forest Glen / Sauganash, North Park / Hollywood Park, Mayfair, Old Irving Park, Dunning, Montclare, Edison Park / Norwood Park border
Closing Soon Cook County Assessor
Filing Closes: October 29, 2026
Evidence Due: October 29, 2026
Lake Township closes at the Cook County Assessor on October 29, 2026. Homeowners across Southwest and South Side Chicago neighborhoods should submit their uniformity comparable PINs before the October 29 deadline.
Covered Communities & Neighborhoods: Beverly, Morgan Park, Mount Greenwood, Ashburn, Chicago Lawn / Marquette Park, West Lawn, Clearing, Garfield Ridge, Gage Park, Back of the Yards / New City, West Elsdon, Englewood / West Englewood, Auburn Gresham
Closing Soon Cook County Assessor
Filing Closes: October 27, 2026
Evidence Due: October 27, 2026
Proviso Township closes at the Cook County Assessor on October 27, 2026. Because Proviso composite tax rates are among the highest in western Cook County, even a $4,000 assessment reduction frequently saves over $1,100 per year.
Covered Communities & Neighborhoods: Forest Park, La Grange Park, Westchester, Brookfield (northern portion), Western Springs (portion), Riverside (portion), North Riverside, Melrose Park, Maywood, Bellwood, Hillside, Broadview, Berkeley, Stone Park
Open Now Cook County Assessor
Filing Closes: November 4, 2026
Evidence Due: November 4, 2026
Palatine Township is open for 2026 Assessor appeals through November 4, 2026. Subdivision-level uniformity comparisons in Palatine, Rolling Meadows, and Inverness are particularly effective for Class 2-03, 2-04, 2-07, and 2-78 homes.
Covered Communities & Neighborhoods: Palatine, Rolling Meadows, Inverness, Hoffman Estates (northern portion), Barrington (portion), Arlington Heights (western border), South Barrington (portion)
Open Now Cook County Assessor
Filing Closes: November 6, 2026
Evidence Due: November 6, 2026
Orland Township is open at the Cook County Assessor through November 6, 2026. Many Orland Park and Tinley Park subdivisions contain dozens of identical or near-identical model homes where building assessments vary by $3.00 to $6.00 per square foot.
Covered Communities & Neighborhoods: Orland Park, Tinley Park (western portion), Orland Hills, Homer Glen border area
Closing Soon Cook County Assessor
Filing Closes: October 22, 2026
Evidence Due: October 22, 2026
Wheeling Township closes at the Cook County Assessor on October 22, 2026, and will reopen later this season at the Cook County Board of Review.
Covered Communities & Neighborhoods: Arlington Heights, Mount Prospect, Wheeling, Buffalo Grove (Cook County portion), Prospect Heights, Des Plaines (northern border)
Opening Soon Cook County Assessor
Filing Closes: November 19, 2026
Evidence Due: November 19, 2026
Schaumburg Township is open through November 19, 2026 at the Cook County Assessor.
Covered Communities & Neighborhoods: Schaumburg, Hoffman Estates, Elk Grove Village (western portion), Roselle (Cook County portion), Hanover Park (eastern portion), Streamwood (border)
Opening Soon Cook County Assessor
Filing Closes: November 23, 2026
Evidence Due: November 23, 2026
Thornton Township opens at the Cook County Assessor with a filing deadline of November 23, 2026.
Covered Communities & Neighborhoods: Homewood, Lansing, Calumet City, South Holland, Dolton, Thornton, Glenwood, Harvey, Riverdale, Burnham
Opening Soon Cook County Assessor
Filing Closes: November 24, 2026
Evidence Due: November 24, 2026
North Chicago Township opens for 2026 Assessor appeals through November 24, 2026.
Covered Communities & Neighborhoods: Lincoln Park, Old Town, Gold Coast, River North, Streeterville, Near North Side, Goose Island / Ranch Triangle