Cook County Trends
The properties below represent a few of the many tax reductions from the our appeals and the grounds on which they were based.
All Townships
38 Locations
Jefferson
City of Chicago
CITY
Rising
Median market value
$360,000
of res. property
Change in Assessments
+13.8%
since the last reassessment
Properties Appealed
2025
17,121
2024
26,327
2023
13,990
0
7,500
15,000
22,500
30,000
Lake
City of Chicago
CITY
Rising
Median market value
$190,000
of res. property
Change in Assessments
+21.1%
since the last reassessment
Properties Appealed
2025
12,265
2024
15,700
2023
8,148
0
5,000
10,000
15,000
20,000
Lake View
City of Chicago
CITY
Rising
Median market value
$1,037,640
of res. property
Change in Assessments
+19.2%
since the last reassessment
Properties Appealed
2025
5,060
2024
7,550
2023
3,785
0
2,000
4,000
6,000
8,000
Lemont
South/West
SOUTH
Rising
Median market value
$471,920
of res. property
Change in Assessments
+34.1%
since the last reassessment
Properties Appealed
2025
2,259
2024
2,577
2023
3,880
0
1,000
2,000
3,000
4,000
Leyden
North/Northwest
NORTH
Rising
Median market value
$300,000
of res. property
Change in Assessments
+18.5%
since the last reassessment
Properties Appealed
2025
7,169
2024
5,359
2023
5,056
0
2,000
4,000
6,000
8,000
Lyons
South/West
SOUTH
Rising
Median market value
$330,010
of res. property
Change in Assessments
+29.4%
since the last reassessment
Properties Appealed
2025
6,506
2024
8,098
2023
11,403
0
5,000
10,000
15,000
20,000
Maine
North/Northwest
NORTH
Rising
Median market value
$395,760
of res. property
Change in Assessments
+19.4%
since the last reassessment
Properties Appealed
2025
16,023
2024
7,765
2023
9,295
0
5,000
10,000
15,000
20,000
New Trier
North/Northwest
NORTH
Rising
Median market value
$1,131,340
of res. property
Change in Assessments
+30.9%
since the last reassessment
Properties Appealed
2025
13,277
2024
7,465
2023
8,376
0
5,000
10,000
15,000
20,000
Niles
North/Northwest
NORTH
Rising
Median market value
$378,735
of res. property
Change in Assessments
+17.6%
since the last reassessment
Properties Appealed
2025
13,283
2024
8,654
2023
8,508
0
5,000
10,000
15,000
20,000
North Chicago
City of Chicago
CITY
Rising
Median market value
$1,399,350
of res. property
Change in Assessments
+11.7%
since the last reassessment
Properties Appealed
2025
1,679
2024
2,643
2023
1,294
0
750
1,500
2,250
3,000
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Detailed Statistics
Key Numbers ?
80,862
Homes & Townhomes
83.5%
Homes with increased assessments
88yrs
Median home age
Size Metrics ?
1,338sqft.
Median building size
3,810sqft.
Median land size
Residential Property Types ?
2+ story homes 25%
1-story homes 70.7%
Townhomes / row houses 2.8%
Split-level homes 1.5%
% of Residential Properties Feature ?
Central AC
44%
Fireplaces
14.6%
Garage
89.2%
Full basement
80.9%
Key Numbers ?
JEFFERSON
COOK COUNTY
Median market value
$360,000
$290,010
Change in Assessments
13.8%
25.2%
Homes & Townhomes
80,862
929,187
Homes with increased assessments
83.5%
91.9%
Median home age
88 yrs
69 yrs
Size Metrics ?
JEFFERSON
COOK COUNTY
Median building size
1,338 sqft
1,374 sqft
Median land size
3,810 sqft
5,760 sqft
Residential Property Types ?
JEFFERSON
COOK COUNTY
2+ story homes
25%
27.3%
1-story homes
70.7%
54.5%
Townhomes / row houses
2.8%
7.8%
Split-level homes
1.5%
10.4%
% of Residential Properties Feature ?
JEFFERSON
COOK COUNTY
Central AC
44%
56.4%
Fireplaces
14.6%
32%
Garage
89.2%
88%
Full basement
80.9%
58.2%
Detailed Statistics
Key Numbers ?
116,398
Homes & Townhomes
83%
Homes with increased assessments
76yrs
Median home age
Size Metrics ?
1,117sqft.
Median building size
3,780sqft.
Median land size
Residential Property Types ?
2+ story homes 16.2%
1-story homes 77.7%
Townhomes / row houses 1.6%
Split-level homes 4.5%
% of Residential Properties Feature ?
Central AC
27.2%
Fireplaces
9.1%
Garage
78.7%
Full basement
70.4%
Key Numbers ?
LAKE
COOK COUNTY
Median market value
$190,000
$290,010
Change in Assessments
21.1%
25.2%
Homes & Townhomes
116,398
929,187
Homes with increased assessments
83%
91.9%
Median home age
76 yrs
69 yrs
Size Metrics ?
LAKE
COOK COUNTY
Median building size
1,117 sqft
1,374 sqft
Median land size
3,780 sqft
5,760 sqft
Residential Property Types ?
LAKE
COOK COUNTY
2+ story homes
16.2%
27.3%
1-story homes
77.7%
54.5%
Townhomes / row houses
1.6%
7.8%
Split-level homes
4.5%
10.4%
% of Residential Properties Feature ?
LAKE
COOK COUNTY
Central AC
27.2%
56.4%
Fireplaces
9.1%
32%
Garage
78.7%
88%
Full basement
70.4%
58.2%
Detailed Statistics
Key Numbers ?
12,242
Homes & Townhomes
86.4%
Homes with increased assessments
79yrs
Median home age
Size Metrics ?
2,322sqft.
Median building size
3,125sqft.
Median land size
Residential Property Types ?
2+ story homes 67.5%
1-story homes 13.9%
Townhomes / row houses 18.5%
Split-level homes 0.1%
% of Residential Properties Feature ?
Central AC
76.3%
Fireplaces
51.8%
Garage
82.4%
Full basement
80.6%
Key Numbers ?
LAKE VIEW
COOK COUNTY
Median market value
$1,037,640
$290,010
Change in Assessments
19.2%
25.2%
Homes & Townhomes
12,242
929,187
Homes with increased assessments
86.4%
91.9%
Median home age
79 yrs
69 yrs
Size Metrics ?
LAKE VIEW
COOK COUNTY
Median building size
2,322 sqft
1,374 sqft
Median land size
3,125 sqft
5,760 sqft
Residential Property Types ?
LAKE VIEW
COOK COUNTY
2+ story homes
67.5%
27.3%
1-story homes
13.9%
54.5%
Townhomes / row houses
18.5%
7.8%
Split-level homes
0.1%
10.4%
% of Residential Properties Feature ?
LAKE VIEW
COOK COUNTY
Central AC
76.3%
56.4%
Fireplaces
51.8%
32%
Garage
82.4%
88%
Full basement
80.6%
58.2%
Detailed Statistics
Key Numbers ?
7,963
Homes & Townhomes
96.8%
Homes with increased assessments
30yrs
Median home age
Size Metrics ?
2,416sqft.
Median building size
11,200sqft.
Median land size
Residential Property Types ?
2+ story homes 50.9%
1-story homes 25.9%
Townhomes / row houses 14.1%
Split-level homes 9.1%
% of Residential Properties Feature ?
Central AC
81.8%
Fireplaces
72%
Garage
97%
Full basement
68.2%
Key Numbers ?
LEMONT
COOK COUNTY
Median market value
$471,920
$290,010
Change in Assessments
34.1%
25.2%
Homes & Townhomes
7,963
929,187
Homes with increased assessments
96.8%
91.9%
Median home age
30 yrs
69 yrs
Size Metrics ?
LEMONT
COOK COUNTY
Median building size
2,416 sqft
1,374 sqft
Median land size
11,200 sqft
5,760 sqft
Residential Property Types ?
LEMONT
COOK COUNTY
2+ story homes
50.9%
27.3%
1-story homes
25.9%
54.5%
Townhomes / row houses
14.1%
7.8%
Split-level homes
9.1%
10.4%
% of Residential Properties Feature ?
LEMONT
COOK COUNTY
Central AC
81.8%
56.4%
Fireplaces
72%
32%
Garage
97%
88%
Full basement
68.2%
58.2%
Detailed Statistics
Key Numbers ?
21,222
Homes & Townhomes
96.2%
Homes with increased assessments
74yrs
Median home age
Size Metrics ?
1,272sqft.
Median building size
5,425sqft.
Median land size
Residential Property Types ?
2+ story homes 18.2%
1-story homes 74.8%
Townhomes / row houses 1.8%
Split-level homes 5.2%
% of Residential Properties Feature ?
Central AC
59.1%
Fireplaces
16.2%
Garage
91.6%
Full basement
60.2%
Key Numbers ?
LEYDEN
COOK COUNTY
Median market value
$300,000
$290,010
Change in Assessments
18.5%
25.2%
Homes & Townhomes
21,222
929,187
Homes with increased assessments
96.2%
91.9%
Median home age
74 yrs
69 yrs
Size Metrics ?
LEYDEN
COOK COUNTY
Median building size
1,272 sqft
1,374 sqft
Median land size
5,425 sqft
5,760 sqft
Residential Property Types ?
LEYDEN
COOK COUNTY
2+ story homes
18.2%
27.3%
1-story homes
74.8%
54.5%
Townhomes / row houses
1.8%
7.8%
Split-level homes
5.2%
10.4%
% of Residential Properties Feature ?
LEYDEN
COOK COUNTY
Central AC
59.1%
56.4%
Fireplaces
16.2%
32%
Garage
91.6%
88%
Full basement
60.2%
58.2%
Detailed Statistics
Key Numbers ?
28,251
Homes & Townhomes
96.9%
Homes with increased assessments
67yrs
Median home age
Size Metrics ?
1,565sqft.
Median building size
7,520sqft.
Median land size
Residential Property Types ?
2+ story homes 33.9%
1-story homes 45.9%
Townhomes / row houses 6.9%
Split-level homes 13.2%
% of Residential Properties Feature ?
Central AC
66.4%
Fireplaces
47.5%
Garage
94.9%
Full basement
52.9%
Key Numbers ?
LYONS
COOK COUNTY
Median market value
$330,010
$290,010
Change in Assessments
29.4%
25.2%
Homes & Townhomes
28,251
929,187
Homes with increased assessments
96.9%
91.9%
Median home age
67 yrs
69 yrs
Size Metrics ?
LYONS
COOK COUNTY
Median building size
1,565 sqft
1,374 sqft
Median land size
7,520 sqft
5,760 sqft
Residential Property Types ?
LYONS
COOK COUNTY
2+ story homes
33.9%
27.3%
1-story homes
45.9%
54.5%
Townhomes / row houses
6.9%
7.8%
Split-level homes
13.2%
10.4%
% of Residential Properties Feature ?
LYONS
COOK COUNTY
Central AC
66.4%
56.4%
Fireplaces
47.5%
32%
Garage
94.9%
88%
Full basement
52.9%
58.2%
Detailed Statistics
Key Numbers ?
34,416
Homes & Townhomes
94.8%
Homes with increased assessments
69yrs
Median home age
Size Metrics ?
1,444sqft.
Median building size
7,028sqft.
Median land size
Residential Property Types ?
2+ story homes 25.9%
1-story homes 44.7%
Townhomes / row houses 12.4%
Split-level homes 17%
% of Residential Properties Feature ?
Central AC
67.4%
Fireplaces
37.6%
Garage
88.4%
Full basement
54.3%
Key Numbers ?
MAINE
COOK COUNTY
Median market value
$395,760
$290,010
Change in Assessments
19.4%
25.2%
Homes & Townhomes
34,416
929,187
Homes with increased assessments
94.8%
91.9%
Median home age
69 yrs
69 yrs
Size Metrics ?
MAINE
COOK COUNTY
Median building size
1,444 sqft
1,374 sqft
Median land size
7,028 sqft
5,760 sqft
Residential Property Types ?
MAINE
COOK COUNTY
2+ story homes
25.9%
27.3%
1-story homes
44.7%
54.5%
Townhomes / row houses
12.4%
7.8%
Split-level homes
17%
10.4%
% of Residential Properties Feature ?
MAINE
COOK COUNTY
Central AC
67.4%
56.4%
Fireplaces
37.6%
32%
Garage
88.4%
88%
Full basement
54.3%
58.2%
Detailed Statistics
Key Numbers ?
18,081
Homes & Townhomes
97.4%
Homes with increased assessments
72yrs
Median home age
Size Metrics ?
2,688sqft.
Median building size
9,100sqft.
Median land size
Residential Property Types ?
2+ story homes 67.9%
1-story homes 18.9%
Townhomes / row houses 3.8%
Split-level homes 9.4%
% of Residential Properties Feature ?
Central AC
79.6%
Fireplaces
80.5%
Garage
92%
Full basement
60.3%
Key Numbers ?
NEW TRIER
COOK COUNTY
Median market value
$1,131,340
$290,010
Change in Assessments
30.9%
25.2%
Homes & Townhomes
18,081
929,187
Homes with increased assessments
97.4%
91.9%
Median home age
72 yrs
69 yrs
Size Metrics ?
NEW TRIER
COOK COUNTY
Median building size
2,688 sqft
1,374 sqft
Median land size
9,100 sqft
5,760 sqft
Residential Property Types ?
NEW TRIER
COOK COUNTY
2+ story homes
67.9%
27.3%
1-story homes
18.9%
54.5%
Townhomes / row houses
3.8%
7.8%
Split-level homes
9.4%
10.4%
% of Residential Properties Feature ?
NEW TRIER
COOK COUNTY
Central AC
79.6%
56.4%
Fireplaces
80.5%
32%
Garage
92%
88%
Full basement
60.3%
58.2%
Detailed Statistics
Key Numbers ?
30,264
Homes & Townhomes
91.5%
Homes with increased assessments
69yrs
Median home age
Size Metrics ?
1,436sqft.
Median building size
5,535sqft.
Median land size
Residential Property Types ?
2+ story homes 23.9%
1-story homes 51.3%
Townhomes / row houses 7.4%
Split-level homes 17.5%
% of Residential Properties Feature ?
Central AC
79.4%
Fireplaces
39.4%
Garage
81.9%
Full basement
57.9%
Key Numbers ?
NILES
COOK COUNTY
Median market value
$378,735
$290,010
Change in Assessments
17.6%
25.2%
Homes & Townhomes
30,264
929,187
Homes with increased assessments
91.5%
91.9%
Median home age
69 yrs
69 yrs
Size Metrics ?
NILES
COOK COUNTY
Median building size
1,436 sqft
1,374 sqft
Median land size
5,535 sqft
5,760 sqft
Residential Property Types ?
NILES
COOK COUNTY
2+ story homes
23.9%
27.3%
1-story homes
51.3%
54.5%
Townhomes / row houses
7.4%
7.8%
Split-level homes
17.5%
10.4%
% of Residential Properties Feature ?
NILES
COOK COUNTY
Central AC
79.4%
56.4%
Fireplaces
39.4%
32%
Garage
81.9%
88%
Full basement
57.9%
58.2%
Detailed Statistics
Key Numbers ?
3,752
Homes & Townhomes
83.8%
Homes with increased assessments
46yrs
Median home age
Size Metrics ?
2,651sqft.
Median building size
2,500sqft.
Median land size
Residential Property Types ?
2+ story homes 52.9%
1-story homes 1.4%
Townhomes / row houses 45.7%
Split-level homes 0%
% of Residential Properties Feature ?
Central AC
90.2%
Fireplaces
74.5%
Garage
74.8%
Full basement
62.1%
Key Numbers ?
NORTH CHICAGO
COOK COUNTY
Median market value
$1,399,350
$290,010
Change in Assessments
11.7%
25.2%
Homes & Townhomes
3,752
929,187
Homes with increased assessments
83.8%
91.9%
Median home age
46 yrs
69 yrs
Size Metrics ?
NORTH CHICAGO
COOK COUNTY
Median building size
2,651 sqft
1,374 sqft
Median land size
2,500 sqft
5,760 sqft
Residential Property Types ?
NORTH CHICAGO
COOK COUNTY
2+ story homes
52.9%
27.3%
1-story homes
1.4%
54.5%
Townhomes / row houses
45.7%
7.8%
Split-level homes
0%
10.4%
% of Residential Properties Feature ?
NORTH CHICAGO
COOK COUNTY
Central AC
90.2%
56.4%
Fireplaces
74.5%
32%
Garage
74.8%
88%
Full basement
62.1%
58.2%