Classifications

The Cook County Assessor, pursuant to a county ordinance, classifies real estate for assessment purposes. In determining which classification is appropriate, the Assessor looks to the actual use of the property.

Class 1:
Vacant raw land without any improvements. Assessed at 22% of fair market value. Beginning in 2009, this class will be assessed at 10% of fair market value.

1-00 Vacant Land
1-90 Minor Improvement on Vacant land

Class 2:
Single/family dwellings, co-ops, residential condominiums, apartment buildings of six/units or less, certain commercial buildings with some residential usage and farmland*. Assessed at 16% of fair market value. Beginning in 2009, this class will be assessed at 10% of fair market value.
*Farmland is not subject to the state multiplier.

Regression Classes

2-00 Residential Land
2-02 One Story Residence, any age, up to 999 square feet
2-03 One Story Residence, any age, 1,000 to 1,800 square feet
2-04 One Story Residence, any age, 1801 square feet
2-05 Two or more story residence, over 62 years of age up to 2,200 square feet
2-06 Two or more story residence, over 62 years of age, 2,201 to 4,999 square feet
2-07 Two or more story residence, up to 62 years of age, up to 2,000 square feet
2-08 Two or more story residence, up to 62 years of age, 3,801 to 4,999 square feet
2-09 Two or more story residence, any age, 5,000 square feet and over
2-10 Old style row house, over 62 years of age
2-11 Apartment building two to six units, over 62 years of age
2-12 Apartment building two to six units, up to 62 years of age
2-18 Mixed use commercial/residential building with apartment and commercial area totaling six units or less with a square foot area less than 20,000 square feet
(This is aka the ma-pa business)
2-34 Split level residence with a lower level below grade, all ages, all sizes
2-78 Two or more story residence, up to 62 years of age, 2,001 to 3,800 square feet
2-95 Individually owned townhouse or row house up to 62 years of age

Non-Regression Classes

2-00 Residential land
2-39 Non-equalized land under agricultural use, valued at farm pricing
2-40 First time agricultural use of land valued at market price
2-41 Vacant land under common ownership with adjacent residence
2-01 Residential garage
2-13 Cooperative
2-24 Farm Building
2-25 Single room occupancy rental building
2-36 Any residence located on a parcel used primarily for commercial or industrial purposes
2-88 Home improvement exemption
2-90 Minor improvement
2-97 Special residential improvements. May apply to condo building in first year of construction before division into individual units.
2-99 Residential condominium

Class 3:
Residential apartment buildings containing seven units or more. Assessed at 26% of fair market value during 2005, 24% during 2006, 22% during 2007 and 20% during 2008. Beginning in 2009, this class will be assessed at 16%, 13% in 2010, 10% in 2010 and subsequent years.

3-00 Land used in conjunction with rental apartments
3-01 Garage used in conjunction with rental apartments
3-13 Two or three story building seven or more units
3-14 Two or three story non-fireproof building with corridor apartment or California type apartments, no corridors exterior entrance
3-15 Two or three story non-fireproof corridor apartments or California type apartments, interior entrance
3-18 Mixed use commercial/residential building with apartments and commercial area totaling seven units or more with a square foot area of over 20,000 square feet
3-90 Other minor improvement related to rental use
3-91 Apartment building over three stories, seven or more units
3-96 Rented modern row houses, seven or more units in a single development or one or more contiguous parcels in common ownership
3-97 Special rental structure
3-99 Rental condominium

Class 4:
Real estate owed by a not/for/profit agency which is used for not/for/profit purposes. Assessed at 30% of fair market value. Beginning in 2009, this class will be assessed at 25% of fair market value.

4-00 Not for profit land
4-01 Not for profit garage
4-17 Not for profit one story commercial building
4-18 Not for profit two or three story mixed use commercial/residential building
4-22 Not for profit one story non-fireproof public garage
4-23 Not for profit gasoline station
4-26 Not for profit commercial greenhouse
4-27 Not for profit theater
4-28 Not for profit bank building
4-29 Not for profit motel
4-30 Not for profit supermarket
4-31 Not for profit shopping center
4-32 Not for profit bowling alley
4-33 Not for profit Quonset hut or butler type building
4-35 Not for profit golf course improvement
4-80 Not for profit industrial minor improvement
4-81 Not for profit garage used in conjunction with industrial improvement
4-83 Not for profit industrial Quonset hut or butler type building
4-87 Not for profit special industrial improvement
4-89 Not for profit industrial condominium
4-90 Not for profit commercial minor improvement
4-91 Not for profit improvement over three stories
4-92 Not for profit two or three story building containing part or all retail and/or commercial space
4-93 Not for profit industrial building
4-96 Not for profit rented modern row houses, seven or more units in a single development
4-97 Not for profit special structure
4-99 Not for profit condominium

Class 5a:
Commercial real state. Assessed at 38% of fair market value. Beginning in 2009, this class will be assessed at 25% of fair market value.

5-00 Commercial land
5-35 Golf course land
5-01 Garage used in conjunction with commercial improvements
5-16 Non-fireproof hotel or rooming house
5-17 One story commercial building
5-22 One story non-fireproof public garage
5-23 Gasoline station
5-26 Commercial greenhouse
5-27 Theater
5-28 Bank building
5-29 Motel
5-30 Supermarket
5-31 Shopping center
5-32 Bowling alley
5-33 Quonset hut or butler type building
5-35 Golf course improvement
5-90 Commercial minor improvement
5-91 Commercial building over three stories
5-92 Two or three story building containing part or all retail and/or commercial space
5-97 Special commercial structure
5-99 Commercial condominium unit

Class 5b:
Industrial real estate. Assessed at 36% of fair market value. Beginning in 2009, this class will be assessed at 25% of fair market value.

5-50 Industrial land
5-80 Industrial minor improvement
5-81 Garage used in conjunction with industrial improvement
5-83 Industrial Quonset hut or butler type building
5-87 Special industrial improvement
5-89 Industrial condominium unit
5-93 Industrial building

Class 6b:
Class 6b Bulletin

Industrial Incentive Classes (6A)

6-50 Industrial land
6-80 Industrial minor improvement
6-81 Garage used in conjunction with industrial incentive improvement
6-83 Industrial Quonset hut or butler type building
6-87 Special industrial improvement
6-89 Industrial condominium unit
6-93 Industrial building

Industrial Incentive Classes (6B)

6-51 Industrial land
6-63 Industrial building
6-70 Industrial minor improvement
6-71 Garage used in conjunction with industrial incentive improvement
6-73 Industrial Quonset hut or butler type building
6-77 Special industrial improvement
6-79 Industrial condominium unit

Industrial Brownfield Incentive Classes (6C)

6-37 Industrial Brownfield land
6-38 Industrial Brownfield
6-54 Other industrial Brownfield minor improvements
6-55 Garage used in conjunction with industrial Brownfield incentive improvement
6-66 Industrial Brownfield Quonset hut or butler type building
6-68 Special industrial Brownfield improvement
6-69 Industrial Brownfield condominium unit

Class 7a:
Class 7a Bulletin

Commercial Incentive Classes (7A)

7-00 Commercial Incentive Land
7-35 Golf Course Land
7-01 Garage used in conjunction with Commercial Incentive improvement
7-16 Non-Fireproof hotel or rooming house
7-17 One story commercial use building
7-22 Garage, service station
7-23 Gasoline station, with/without bays, store
7-26 Commercial greenhouse
7-27 Theater
7-28 Bank building
7-29 Motel
7-30 Supermarket
7-31 Shopping center
7-32 Bowling alley
7-33 Quonset hut or butler type building
7-35 Golf course improvement
7-90 Other minor commercial improvement
7-91 Office building(One story, low rise, mid rise, high rise)
7-92 Two or three story building containing part or all retail and/or commercial space
7-97 Special commercial structure
7-99 Commercial/Industrial-Condominium unit/garage

Class 7b:
Class 7b Bulletin

Commercial Incentive Classes (7B)

7-42 Commercial incentive land
7-45 Golf course land
7-43 Garage used in conjunction with commercial incentive improvement
7-45 Golf course improvement
7-46 Non-Fireproof hotel or rooming house
7-47 One story commercial building
7-48 Motel
7-52 Garage, service station
7-53 Gasoline station, with/without bays, store
7-56 Commercial greenhouse
7-57 Theater
7-58 Bank building
7-60 Supermarket
7-61 Shopping center
7-62 Bowling alley
7-64 Quonset hut or butler type building
7-65 Other minor commercial improvements
7-67 Special commercial structure
7-72 Two or three story building containing part or all retail and/or commercial space
7-74 Office building
7-98 Commercial / Industrial - condominium units / garage

Class 8:
Class 8 Bulletin

Commercial/Industrial Incentive

8-00 Commercial incentive land
8-35 Golf course land
8-50 Industrial incentive land
8-01 Garage used in conjunction with commercial incentive improvement
8-16 Non-fireproof hotel or rooming house
8-17 One story commercial building
8-22 Garage, service station
8-23 Gasoline station with/without bay, store
8-26 Commercial greenhouse
8-27 Theater
8-28 Bank building
8-29 Motel
8-30 Supermarket
8-31 Shopping center
8-32 Bowling alley
8-33 Quonset hut or butler type building
8-35 Golf course improvement
8-80 Industrial minor improvement
8-81 Garage used in conjunction with industrial incentive improvement
8-83 Quonset hut or butler type building
8-87 Special industrial improvement
8-89 Industrial condominium unit
8-90 Minor industrial improvement
8-91 Office building
8-92 Two or three story building containing part or all retail and/or commercial space
8-93 Industrial building
8-97 Special commercial structure
8-99 Commercial/Industrial condominium unit/garage


Class C:
Class C Bulletin

Class L:
Class L Bulletin

Class S:
Class S Bulletin