{
  "query": {
    "country": "BR",
    "town": "Porto Alegre",
    "property_type": "any",
    "months": 12
  },
  "status": "ok",
  "price": {
    "currency": "BRL",
    "unit": "per home (ITBI tax base)",
    "value": 280000,
    "measure": "median",
    "median": 280000,
    "typical_low": 141946,
    "typical_high": 950000,
    "min": 30000,
    "max": 19000000
  },
  "sample_size": 30095,
  "period": {
    "from": "2025-10-14",
    "to": "2026-10-14"
  },
  "confidence": "high",
  "price_type": "posted_price",
  "as_of": "2026-10-24T11:02:29.477Z",
  "source": {
    "id": "br-poa-itbi",
    "name": "ITBI, property transfer tax guides of Porto Alegre",
    "publisher": "Prefeitura de Porto Alegre, Secretaria Municipal da Fazenda, via dadosabertos.poa.br",
    "licence": "Creative Commons Attribution (CC BY), per the publisher's CKAN record (license_title 'Creative Commons Attribution').",
    "licence_url": "https://dadosabertos.poa.br/dataset/itbi",
    "attribution": "Source: Prefeitura de Porto Alegre, Secretaria Municipal da Fazenda, ITBI, dadosabertos.poa.br, CC BY. Changed by ProofPrice: only residential apartments and houses, medians and percentiles computed from the guides.",
    "url": "https://dadosabertos.poa.br/dataset/itbi"
  },
  "method": "Brazil, Porto Alegre: median and 10th-90th percentile of the ITBI tax base (base de calculo) on property-transfer tax guides for apartments and houses over the last 3, 6, 12 or 24 months (your request is rounded to the nearest) ending at the newest guide. The tax base is not a verified price paid. Cancelled guides, partial transfers, blank bases, bases under BRL 30,000 and of BRL 20 million or more are dropped.",
  "method_url": "https://proofprice.com/method",
  "summary": "Homes in Porto Alegre had a median ITBI tax base of R$280,000 (typical range R$141,946 to R$950,000), a median of R$4,989 per m2 of private area. This is the property-transfer tax base on the city's guides, which may differ from the price actually paid. Based on 30095 records from Prefeitura de Porto Alegre, Secretaria Municipal da Fazenda, via dadosabertos.poa.br (2025-10-14 to 2026-10-14). Confidence: high.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "price_basis": "ITBI tax base (base de calculo), not a verified price paid",
    "per_m2": {
      "median": 4989,
      "typical_low": 2640,
      "typical_high": 10944,
      "sample_size": 29882,
      "currency": "BRL"
    }
  },
  "answer_id": "ans_317e8c6b9168d3916dec",
  "method_version": "1",
  "retrieved_at": "2026-10-24T11:02:29.476Z",
  "evidence": {
    "type": "posted_price",
    "label": "Posted or listed price",
    "meaning": "A price a seller, market or authority publishes in advance (a shelf price, tariff, fee schedule or quoted wholesale price): it is what is asked, not a record of what each customer paid."
  },
  "reliability": "record_level",
  "data_as_of": "2026-10-14",
  "data_age_days": 10,
  "suggestions": [
    "This is a posted price, not what each customer paid."
  ]
}