{
  "schemaVersion": 1,
  "name": "NOTICE Italy city property market research dataset",
  "description": "Source-separated residential asking-price histories, current portal cross-checks, and official OMI reference observations for U.S. households researching Milan, Florence, Rome, and Venice.",
  "url": "https://noticeitaly.com/data/italy-property-market.json",
  "researchedOn": "2026-07-17",
  "referenceMonth": "2026-06",
  "currency": "EUR",
  "unit": "EUR per square metre",
  "methodology": {
    "rule": "Asking prices, OMI quotation ranges, and transaction statistics remain separate because they measure different things. A current cross-portal indicator is calculated only when two sources have sufficiently compatible geography and definitions.",
    "currentCrossPortalWeighting": "City-specific weights are disclosed beside every compatible same-month citywide asking indicator. Milan and Rome use neutral 50/50 weights because no public audit supports a finer reliability distinction. Florence uses 55% Idealista and 45% Immobiliare.it because Idealista exposes a complete reproducible monthly table while the second source exposes only verified anchors. Venice is not combined because the published geographies differ.",
    "continuousSeries": "The monthly two-year series is the public Idealista advertised asking-price history, normalized to January 2024 = 100 when rendered. Immobiliare.it is used as a current cross-check because a complete permission-compliant monthly history was not available for automation.",
    "sourceTiers": {
      "A": "Official administrative, statistical, legal, and OMI sources",
      "B": "Established listing portals measuring advertised asking prices",
      "C": "Provider and reputable secondary sources used only for context"
    },
    "updateCadence": "Checked on the first day of each month. Portal observations are added only after a public-source review; OMI changes only when Agenzia Entrate publishes a new semiannual period.",
    "antiScrapingRule": "The automated updater does not bypass access controls, crawl listing inventory, or infer missing values. A blocked or unavailable source is retained as stale and flagged for editorial review."
  },
  "cities": {
    "milan": {
      "name": "Milan",
      "idealistaHistoryUrl": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/lombardia/milano-provincia/milano/storico/",
      "askingHistory": [
        ["2024-01", 4986], ["2024-02", 4987], ["2024-03", 4988], ["2024-04", 4990], ["2024-05", 4987], ["2024-06", 4987],
        ["2024-07", 5032], ["2024-08", 4989], ["2024-09", 4988], ["2024-10", 5031], ["2024-11", 5043], ["2024-12", 5067],
        ["2025-01", 5037], ["2025-02", 4986], ["2025-03", 4986], ["2025-04", 5073], ["2025-05", 5108], ["2025-06", 5104],
        ["2025-07", 5116], ["2025-08", 5154], ["2025-09", 5143], ["2025-10", 5188], ["2025-11", 5171], ["2025-12", 5184],
        ["2026-01", 5183], ["2026-02", 5196], ["2026-03", 5192], ["2026-04", 5191], ["2026-05", 5181], ["2026-06", 5165]
      ],
      "currentCrossPortalIndicator": {
        "valueEurM2": 5420,
        "status": "calculated",
        "sources": [
          { "name": "Idealista", "valueEurM2": 5165, "weight": 0.5, "url": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/lombardia/milano-provincia/milano/" },
          { "name": "Immobiliare.it", "valueEurM2": 5675, "weight": 0.5, "url": "https://www.immobiliare.it/mercato-immobiliare/lombardia/milano/" }
        ]
      },
      "omiWatch": {
        "latestPeriod": "2025-H2",
        "zoneCodes": ["B12"],
        "observations": [{ "zone": "B12", "label": "Centro storico / Duomo", "minimumEurM2": 8700, "maximumEurM2": 10900 }],
        "note": "Representative release-watch zone only; the separate Milan equal-zone reference is maintained by scripts/update-property-price-index.mjs."
      },
      "officialReference": {
        "type": "Equal-zone median midpoint reference; not a transaction index or appraisal",
        "source": "Agenzia Entrate - OMI and Comune di Milano open data",
        "periods": [
          ["2023-H2", 3587.5, 100.0], ["2024-H1", 3675, 102.4], ["2024-H2", 3900, 108.7], ["2025-H1", 3975, 110.8], ["2025-H2", 4000, 111.5]
        ],
        "url": "https://dati.comune.milano.it/dataset/ds1996-quotazioni-immobiliari-omi-compravendita-e-locazione-riepilogo"
      }
    },
    "florence": {
      "name": "Florence",
      "idealistaHistoryUrl": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/toscana/firenze-provincia/firenze/storico/",
      "askingHistory": [
        ["2024-01", 4035], ["2024-02", 4059], ["2024-03", 4084], ["2024-04", 4121], ["2024-05", 4127], ["2024-06", 4110],
        ["2024-07", 4126], ["2024-08", 4156], ["2024-09", 4157], ["2024-10", 4167], ["2024-11", 4174], ["2024-12", 4216],
        ["2025-01", 4234], ["2025-02", 4280], ["2025-03", 4331], ["2025-04", 4406], ["2025-05", 4479], ["2025-06", 4492],
        ["2025-07", 4505], ["2025-08", 4527], ["2025-09", 4542], ["2025-10", 4514], ["2025-11", 4525], ["2025-12", 4531],
        ["2026-01", 4567], ["2026-02", 4580], ["2026-03", 4602], ["2026-04", 4622], ["2026-05", 4626], ["2026-06", 4623]
      ],
      "currentCrossPortalIndicator": {
        "valueEurM2": 4673,
        "status": "calculated",
        "sources": [
          { "name": "Idealista", "valueEurM2": 4623, "weight": 0.55, "url": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/toscana/firenze-provincia/firenze/storico/" },
          { "name": "Immobiliare.it", "valueEurM2": 4735, "weight": 0.45, "url": "https://www.immobiliare.it/mercato-immobiliare/toscana/firenze/" }
        ]
      },
      "omiWatch": {
        "latestPeriod": "2025-H2",
        "zoneCodes": ["B5", "C6", "C15", "D20", "D6", "E1"],
        "observations": [
          { "zone": "B5", "label": "Centro storico", "minimumEurM2": 3600, "maximumEurM2": 5300 },
          { "zone": "C6", "label": "Campo di Marte", "minimumEurM2": 2800, "maximumEurM2": 3500 },
          { "zone": "C15", "label": "Isolotto", "minimumEurM2": 2450, "maximumEurM2": 2950 },
          { "zone": "D20", "label": "Novoli / Carraia", "minimumEurM2": 2300, "maximumEurM2": 2900 },
          { "zone": "D6", "label": "Le Piagge", "minimumEurM2": 1900, "maximumEurM2": 2500 },
          { "zone": "E1", "label": "Ugnano / Mantignano", "minimumEurM2": 2050, "maximumEurM2": 2900 }
        ]
      },
      "officialReference": {
        "type": "Selected normal-condition OMI civil-dwelling ranges; not a city average",
        "source": "Agenzia Entrate - OMI",
        "periods": [
          ["2024-H1", "Centro storico B5", 3600, 4800], ["2024-H2", "Centro storico B5", 3600, 4900],
          ["2025-H1", "Centro storico B5", 3600, 5100], ["2025-H2", "Centro storico B5", 3600, 5300]
        ],
        "url": "https://www1.agenziaentrate.gov.it/servizi/geopoi_omi/index.htm"
      }
    },
    "rome": {
      "name": "Rome",
      "idealistaHistoryUrl": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/lazio/roma-provincia/roma/storico/",
      "askingHistory": [
        ["2024-01", 3022], ["2024-02", 3024], ["2024-03", 3021], ["2024-04", 3021], ["2024-05", 3016], ["2024-06", 3012],
        ["2024-07", 3040], ["2024-08", 3042], ["2024-09", 3036], ["2024-10", 3061], ["2024-11", 3077], ["2024-12", 3091],
        ["2025-01", 3081], ["2025-02", 3095], ["2025-03", 3124], ["2025-04", 3163], ["2025-05", 3191], ["2025-06", 3215],
        ["2025-07", 3229], ["2025-08", 3243], ["2025-09", 3230], ["2025-10", 3237], ["2025-11", 3277], ["2025-12", 3306],
        ["2026-01", 3305], ["2026-02", 3328], ["2026-03", 3369], ["2026-04", 3404], ["2026-05", 3407], ["2026-06", 3429]
      ],
      "currentCrossPortalIndicator": {
        "valueEurM2": 3628,
        "status": "calculated",
        "sources": [
          { "name": "Idealista", "valueEurM2": 3429, "weight": 0.5, "url": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/lazio/roma-provincia/roma/storico/" },
          { "name": "Immobiliare.it", "valueEurM2": 3827, "weight": 0.5, "url": "https://www.immobiliare.it/mercato-immobiliare/lazio/roma/" }
        ]
      },
      "omiWatch": {
        "latestPeriod": "2025-H2",
        "zoneCodes": ["D29"],
        "observations": [{ "zone": "D29", "label": "EUR / Viale Europa", "minimumEurM2": 3300, "maximumEurM2": 4900 }]
      },
      "officialReference": {
        "type": "Official annual transaction activity and selected OMI zone range; not an asking-price series",
        "source": "Agenzia Entrate - OMI / ABI Rapporto Immobiliare",
        "annualTransactions": [
          ["2024", 35072, 261300], ["2025", 37293, 270200]
        ],
        "selectedRange": ["2025-H2", "EUR / Viale Europa D29", 3300, 4900],
        "url": "https://www.abi.it/download/rapporto-immobiliare-2026-il-settore-residenziale/?wpdmdl=58232"
      }
    },
    "venice": {
      "name": "Venice",
      "idealistaHistoryUrl": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/veneto/venezia-provincia/venezia/storico/",
      "askingHistory": [
        ["2024-01", 4415], ["2024-02", 4458], ["2024-03", 4466], ["2024-04", 4463], ["2024-05", 4467], ["2024-06", 4486],
        ["2024-07", 4498], ["2024-08", 4481], ["2024-09", 4529], ["2024-10", 4553], ["2024-11", 4553], ["2024-12", 4572],
        ["2025-01", 4569], ["2025-02", 4596], ["2025-03", 4562], ["2025-04", 4651], ["2025-05", 4655], ["2025-06", 4642],
        ["2025-07", 4717], ["2025-08", 4725], ["2025-09", 4734], ["2025-10", 4792], ["2025-11", 4808], ["2025-12", 4877],
        ["2026-01", 4892], ["2026-02", 4913], ["2026-03", 4897], ["2026-04", 4905], ["2026-05", 4957], ["2026-06", 4958]
      ],
      "currentCrossPortalIndicator": {
        "valueEurM2": null,
        "status": "not calculated: published portal geographies are not sufficiently comparable",
        "sources": [
          { "name": "Idealista portal-defined Venice series", "valueEurM2": 4958, "weight": null, "url": "https://www.idealista.it/sala-stampa/report-prezzo-immobile/vendita/veneto/venezia-provincia/venezia/storico/" },
          { "name": "Immobiliare.it municipality-wide indication", "valueEurM2": 3330, "weight": null, "url": "https://www.immobiliare.it/mercato-immobiliare/veneto/venezia/" }
        ]
      },
      "omiWatch": {
        "latestPeriod": "2025-H2",
        "zoneCodes": ["B24", "B15", "E4", "E23"],
        "observations": [
          { "zone": "B24", "label": "San Marco", "minimumEurM2": 3900, "maximumEurM2": 5600 },
          { "zone": "B15", "label": "Cannaregio Sud", "minimumEurM2": 3600, "maximumEurM2": 4600 },
          { "zone": "E4", "label": "Lido Centro", "minimumEurM2": 2700, "maximumEurM2": 3400 },
          { "zone": "E23", "label": "Mestre Centro", "minimumEurM2": 1650, "maximumEurM2": 1850 }
        ]
      },
      "officialReference": {
        "type": "Selected normal-condition OMI civil-dwelling ranges; not a municipality average",
        "source": "Agenzia Entrate - OMI",
        "periods": [
          ["2025-H2", "San Marco B24", 3900, 5600], ["2025-H2", "Cannaregio Sud B15", 3600, 4600],
          ["2025-H2", "Lido Centro E4", 2700, 3400], ["2025-H2", "Mestre Centro E23", 1650, 1850]
        ],
        "url": "https://www1.agenziaentrate.gov.it/servizi/geopoi_omi/index.htm"
      }
    }
  },
  "legalNotice": "General educational market research only. Asking indicators are not closed-sale prices. OMI ranges are not appraisals. This dataset is not brokerage, valuation, legal, tax, mortgage, technical, notarial, or investment advice. Verify the property, source data, and current rules with independent qualified professionals."
}