This is a Non-Federal dataset covered by different Terms of Use than

Chicago Historic Resources Survey - Red and Orange Buildings - KML

Metadata Updated: February 3, 2018

The Chicago Historic Resources Survey (CHRS), completed in 1995, was a decade-long research effort by the City of Chicago to analyze the historic and architectural importance of all buildings, objects, structures, and sites constructed in the city prior to 1940. During 12 years of field work and follow-up research that started in 1983, CHRS surveyors identified approximately 9,900 properties which were considered to have some historic or architectural importance. Please note that this CHRS dataset is limited and does not include the entire survey:

  1. A color-coded ranking system was used to identify historic and architectural significance relative to age, degree of external physical integrity, and level of possible significance. This dataset only includes buildings identified with the two highest color codes: "Red" and "Orange." Buildings and structures coded "Red" or "Orange" (unless designated as a Chicago Landmark or located within a Chicago Landmark District) are subject to the City of Chicago’s Demolition-Delay Ordinance (link to:, adopted by City Council in 2003.

  2. Only buildings are included in this dataset; structures and objects such as bridges, park structures, monuments and mausoleums, generally are not represented. Likewise, garages, coach houses, and other secondary structures associated with a building may not be consistently depicted or color-coded. If an “Orange”- or “Red”-rated building was demolished after 2008, it may still appear in the map. The CHRS occasionally rated only part of a building or part of a group of joined buildings as “Orange” or “Red;” however the entire building or group of joined buildings may be incorrectly identified as “Orange” or “Red.”

Additional information about the CHRS is available at or by contacting the Historic Preservation Division at (312) 744-3200.

To view or use this KMZ file, compression software, such as 7-Zip, and special GIS software, such as Google Earth, are required. To download this file, right-click the "Download" link above and choose "Save link as."

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

Downloads & Resources


Metadata Created Date January 28, 2016
Metadata Updated Date February 3, 2018

Metadata Source

Harvested from Chicago JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date January 28, 2016
Metadata Updated Date February 3, 2018
Unique Identifier
Maintainer Email
Public Access Level public
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 71798f98-154f-4ae6-8123-3425c4c8aa90
Harvest Source Id added36a-9183-4385-a0e5-dd478946b24c
Harvest Source Title Chicago JSON
Data First Published 2012-03-09
Homepage URL
Data Last Modified 2012-08-13
Source Datajson Identifier True
Source Hash 6c12339bb587d64c460ef1b567e0ff5c9ed95b92
Source Schema Version 1.1
Category Historic Preservation

Didn't find what you're looking for? Suggest a dataset here.