{
  "query": {
    "country": "US",
    "town": "Chicago",
    "postcode": null,
    "state": "IL",
    "property_type": "any",
    "months": 12
  },
  "status": "ok",
  "price": {
    "currency": "USD",
    "unit": "per sale",
    "value": 350000,
    "measure": "median",
    "median": 350000,
    "typical_low": 126000,
    "typical_high": 925000,
    "min": 10447,
    "max": 7870528
  },
  "sample_size": 20150,
  "period": {
    "from": "2025-08-13",
    "to": "2026-08-12"
  },
  "confidence": "high",
  "price_type": "transaction",
  "as_of": "2026-10-14T21:27:17.347Z",
  "source": {
    "id": "us-home-sales",
    "name": "Assessor - Parcel Sales",
    "publisher": "Cook County Assessor's Office (published on the Cook County Open Data portal)",
    "licence": "UNCONFIRMED: no data licence is stated on the Cook County Open Data dataset record (access level 'public'; attribution 'Cook County Assessor's Office'). The County's website terms (https://www.cookcountyil.gov/terms-use) grant no data licence, say the information is 'as is' and that it 'shall not be used for advertising or product endorsement purposes'. Commercial reuse of the aggregates has not been confirmed with the Assessor's Office (permission requested).",
    "licence_url": "https://www.cookcountyil.gov/terms-use",
    "attribution": "Source: Cook County Assessor's Office, Assessor - Parcel Sales (Cook County Open Data, datacatalog.cookcountyil.gov). Figures are ProofPrice aggregates; the County provides the data without warranty.",
    "url": "https://datacatalog.cookcountyil.gov/d/wvhk-k5uv"
  },
  "method": "Median and 10th–90th percentile of residential sales in the Cook County Assessor's Parcel Sales file in the 12 months up to its latest recorded sale (2026-08-12). Excluded with the Assessor's own flags: multi-parcel sales, sales under $10,000, quit claim and executor deeds, and repeat records of the same sale within 365 days. Cook County sales are reported on a lag, so the latest weeks are incomplete; 'Chicago' means the eight City of Chicago assessment townships.",
  "method_url": "https://proofprice.com/method",
  "summary": "Homes (houses, condos and small apartment buildings) in Chicago, IL sold for a median of US$350,000; 10th–90th percentile range US$126,000–US$925,000. Cook County sales are reported with a lag, so the latest weeks are incomplete. Based on 20150 records from Cook County Assessor's Office (published on the Cook County Open Data portal) (2025-08-13 to 2026-08-12). Confidence: high.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "area": "Chicago, IL",
    "dataset": {
      "name": "Assessor - Parcel Sales",
      "id": "wvhk-k5uv",
      "url": "https://datacatalog.cookcountyil.gov/d/wvhk-k5uv"
    },
    "window": {
      "months": 12,
      "from_exclusive": "2025-08-12",
      "to": "2026-08-12"
    },
    "dataset_latest_sale": "2026-08-12",
    "notes": [
      "Cook County sales are reported on a lag, so the most recent weeks hold fewer sales than they will."
    ]
  },
  "answer_id": "ans_4c1c98ee9ce6d3f9a972",
  "method_version": "1",
  "retrieved_at": "2026-10-14T21:27:17.347Z",
  "evidence": {
    "type": "transaction",
    "label": "Recorded sale prices",
    "meaning": "Prices recorded in official records of completed sales: they show what others paid, not what a particular item is worth or what is on offer now."
  }
}