HelloSuey

Where the data comes from

The lists are built from public property records. The site also reads national sources for the home page and trade guide figures, while market pages draw their counts and medians from local property records. Every data set is listed with its version, what HelloSuey changes and the credit or notice its terms ask for.

Covered area agencies
3
Covered area data sets
5
National sources
6

National sources

Data sets read for figures on the home page and the trade guides

Illinois

Sources HelloSuey reads in Illinois, grouped by agency

Illinois Department of Revenue

Home sale records

  • PTAX-203, 203-A, and 203-B

    Data set
    it54-y4c6
    Version
    November 8, 2026
    License
    Public Domain
    Site uses
    new-owner counts, median price, company-buyer share

    Changes

    HelloSuey keeps only homes bought to live in and formats buyer names and addresses for mailing.

    Rows left out

    1. Exempt transfer with no sale (for example, into the owner's own trust)
    2. Buyer is a company, trust or other organization
    3. Buyer did not mark the home as their principal residence
    4. Deed type is not a sale deed (quitclaim, court, sheriff or officer deed)
    5. Intended use is not a home
    6. Price under $10,000
    7. Marked as a non-market sale on line 10

    City spellings merged

    22 cities
    • Carpentersville CARPENTERSVILLE, CAPENTERSVILLE
    • Channahon CHANNAHON, CHANNAHON
    • East Dundee EAST DUNDEE, E DUNDEE
    • Elgin ELGIN, EGLIN
    • Forest View FOREST VIEW, FORESTVIEW
    • Glendale Heights GLENDALE HEIGHTS, GLENDALE HTS
    • Hampshire HAMPSHIRE, HAMPSHRIE
    • Joliet JOLIET, CITY OF JOLIET
    • La Grange LA GRANGE, LAGRANGE
    • La Grange Park LA GRANGE PARK, LAGRANGE PARK
    • Lakewood LAKEWOOD, VILLAGE OF LAKEWOOD
    • Lemont LEMONT, LEMMONT
    • Lindenhurst LINDENHURST, -A1LINDENHURST
    • Mount Prospect MOUNT PROSPECT, MT PROSPECT
    • Naperville NAPERVILLE, NPAERVILLE
    • Oak Park OAK PARK, -S301OAK PARK
    • Oakbrook Terrace OAKBROOK TERRACE, OAKBROOK TERR
    • Pingree Grove PINGREE GROVE, PINGREE FROVE
    • Plainfield PLAINFIELD, PLAINEFIELD, PLAINFIELED
    • St. Charles ST CHARLES, SAINT CHARLES, ST. CHARLES
    • Tinley Park TINLEY PARK, TINLEY PK.
    • Willowbrook WILLOWBROOK, WILLOW BROOK
How the data sets are made available

Public data sets shall be made available without any registration requirement, license requirement, or restrictions on their use provided that the agency may require a third party providing to the public any public data set, or application utilizing such data set, to explicitly identify the source and version of the public data set and a description of any modifications made to such public data set.

20 ILCS 45/15, Read November 14, 2026

Cook County Assessor's Office

Home facts records

From the agency's terms

By use of this system and any data contained therein, you agree that your use shall conform to all applicable laws and regulations and you shall not violate the rights of any third parties.

Terms read November 14, 2026 Terms of use

City of Chicago

Building permit records

  • Building Permits

    Data set
    ydr8-5enu
    Version
    November 14, 2026
    License
    See Terms of Use
    Site uses
    roof and HVAC permits on file

    Changes

    HelloSuey matches permits to sales by parcel number and sorts them by kind. Work that needs no permit leaves no record.

Site data

  • Boundaries - ZIP Codes

    Data set
    unjd-c2ca
    Version
    April 28, 2025
    License
    See Terms of Use
    Site uses
    Chicago ZIP list, Chicago ZIP map

    Changes

    HelloSuey reads this source for the site's own pages. No list row comes from it.

From the agency's terms

The City may require a user of this data to terminate any and all display, distribution or other use of any or all of the data provided at this website for any reason including, without limitation, violation of these Terms of Use or other terms as defined by City agencies or departments contributing data to this website.

Terms read November 14, 2026 Terms of use

Required notice

This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. The City of Chicago makes no claims as to the content, accuracy, timeliness, or completeness of any of the data provided at this site. The data provided at this site is subject to change at any time. It is understood that the data provided at this site is being used at one's own risk.

City of Chicago, Data disclaimer