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Chicago and Cook County at night: every parcel with a declared sale a point of light, coloured by the median price of the homes declared around it
Median price of homes declared
$120k$380k$1.2m+
Screened residential declarations (MyDec), January 2023 – December 2025, in the 750 m around, ten or more. Every point is a Cook County parcel; grey where there are fewer.

VPI OS · Illinois · 102 counties · live

Every declared sale in Illinois.

1,327,088 real estate transfers declared to the Illinois Department of Revenue since October 2021, in all 102 counties – with Chicago and all of Cook County parcel by parcel, 523,066 PINs on the map.

102 counties
Chicago 271,293Cook County 570,720Lake View 13,602DuPage 68,531Lake 57,361Will 59,340Naperville 7,940Evanston 8,257Springfield 15,085Rockford 17,307Champaign 18,127

Each county and city opens on its own map. Declarations as MyDec publishes them – instrument dates 16 October 2021 to 9 October 2026; the latest weeks fill in as deeds are recorded.

1,327,088declared sales since October 2021
567,477screened home sales
102counties, each on its own map
1,417cities, villages and towns
271,293declared sales in Chicago
523,066Cook County PINs on the map
1,590ZIP codes
77community areas of Chicago

Illinois Department of Revenue · Cook County Assessor · the VERA PI databases. No buyers or sellers. Counted .

County by county · Illinois

Pick a county or a city. Its map opens.

All 102 counties and every city, village and town with ten declared sales or more – the declarations, the median of the screened home sales and the years since 2022. Chicago opens block by block, with its 77 community areas. Each has its own address to share.

VERA PI · Illinois

Four tools, one state.

The same operating system as in France, New York, Florida, Massachusetts and London, with the Illinois Department of Revenue’s transfer declarations underneath: the PIN, its declared sales, the declarations around it, its city, its ZIP code and its county.

VERA PI MapThe 102 counties by their median, and Cook County block by block – every parcel with a declared sale. Pick a county, tap a parcel.Open the map → VERA PI CameraPoint your phone at a building in Chicago or anywhere in Cook County: the position and the heading find the parcels in front of you, and you confirm the PIN or the unit.Open the camera → Check a priceWhere an asking price sits among the screened home sales within 500 m in Cook County – and the share of them at or below it. Elsewhere, the city’s, the ZIP code’s and the county’s medians.Check a price → Illinois Property BriefThe PIN, its declared sales and its addresses, the declarations around it, the city, the ZIP code and the county – checked by a person.Order a Brief →

Check a price · Illinois

Where does the asking price sit?

MyDec’s use code B puts houses, condominiums, townhomes and duplexes together – the comparison is all of them.

Pick an address and type the asking price. In Cook County VERA PI places it among the screened home sales within 500 m – the median, the middle half, the share at or below it and how many declarations stand behind them. Elsewhere in Illinois it shows the city’s, the ZIP code’s and the county’s medians.

The method

Every declared sale, counted once.

Every figure on these pages comes from the VERA PI databases: the transfer declarations the parties file with the Illinois Department of Revenue (MyDec, form PTAX-203) – with their price, their dates, the deed, the use and every PIN they name – and the Cook County Assessor’s current parcels, their centroids and addresses, each with its version and date.

  • Illinois Department of Revenue – MyDec real estate transfer declarations (PTAX-203)every declaration with an instrument or recording date 16 October 2021 – 16 October 2026: 1,364,331 kept, 1,327,088 with an instrument date in the window, with their full and net consideration, dates, deed, use, every PIN and the declared address – datasets it54-y4c6, ay2h-5hx3, b46z-jwev and vbnw-q5s8, public domain
  • Cook County Assessor – the parcel universe and its addresses (current)523,066 Cook PINs with their current centroid (523,053), address, municipality, Chicago community area and class – today’s parcels, not the parcels on the day of a sale
  • VERA PI – the screen il-residential-screen-v1567,477 declarations that pass a conservative first screen for home-sale comparisons – every one screened out kept in the history with its reasons
  • US Census Bureau – cartographic boundary filesthe outlines of the 102 counties (1:10m, via us-atlas 3.0.1)

No buyers or sellers, ever – the database holds none. Sales are shown as counts and as medians of ten or more, with their period and radius. A declaration is counted once, however many PINs it names, and its price belongs to the whole transfer – never split over its parcels. MyDec is the one source of every count and median: the Cook Assessor’s own sales are never added. A median uses the screened residential declarations (il-residential-screen-v1: a warranty or special warranty deed, $10,000 or more, one PIN, no related parties, foreclosures, auctions or other special circumstances, advertised, no personal property, one declaration per document) – a first screen, not proof of a market sale; MyDec’s code B puts houses, condominiums, townhomes and duplexes together. In Cook County a parcel sits on the map at its current centroid – not its entrance, not a unit, not the parcel on the day of the sale; outside Cook there is no parcel point yet, so the address and the PIN are searchable but not on the map. There is no verified living area, so there is no price per square foot. The latest weeks are incomplete: a declaration reaches MyDec when the deed is recorded.

MyDec data: Illinois Department of Revenue, public domain (the datasets’ own metadata) – reported by the parties to a transfer, not an individual quality guarantee from IDOR; the source. Cook County parcels and addresses: Cook County Assessor’s Office, the Cook County open data portal and its terms. County outlines: US Census Bureau. Map: © OpenStreetMap contributors, OpenFreeMap.