{
 "code_insee": "60143",
 "nom": "Chaumont-en-Vexin",
 "departement": "60",
 "annee_reference": 2025,
 "prix_m2_median": 2440,
 "prix_m2_median_appartement": 2273,
 "prix_m2_median_appartement_yoy_pct": 0.7,
 "prix_m2_median_maison": 2477,
 "prix_m2_median_maison_yoy_pct": -6.8,
 "prix_vente_median": 211000,
 "ventes_annee_reference": 25,
 "ventes_5_ans": 149,
 "fiabilite": "Modérée",
 "derniers_12_mois": {
  "debut": "2025-07-01",
  "fin": "2026-06-30",
  "ventes": 23,
  "prix_m2_median": 2256,
  "prix_m2_median_appartement": null,
  "prix_m2_median_appartement_yoy_pct": null,
  "prix_m2_median_maison": 2273,
  "prix_m2_median_maison_yoy_pct": -10.5
 },
 "series_annuelles": [
  {
   "annee": 2021,
   "apt": 2562,
   "apt_n": 2,
   "maison": 2804,
   "maison_n": 14
  },
  {
   "annee": 2022,
   "apt": 3156,
   "apt_n": 5,
   "maison": 2649,
   "maison_n": 35
  },
  {
   "annee": 2023,
   "apt": 1863,
   "apt_n": 7,
   "maison": 2792,
   "maison_n": 24
  },
  {
   "annee": 2024,
   "apt": 2258,
   "apt_n": 8,
   "maison": 2657,
   "maison_n": 18
  },
  {
   "annee": 2025,
   "apt": 2273,
   "apt_n": 5,
   "maison": 2477,
   "maison_n": 20
  }
 ],
 "tranches_surface": {
  "Appartement": [
   {
    "band": "< 30 m²",
    "median": 2714,
    "n": 1
   },
   {
    "band": "30-60 m²",
    "median": 2273,
    "n": 8
   },
   {
    "band": "60-90 m²",
    "median": 2230,
    "n": 4
   },
   {
    "band": "90-120 m²",
    "median": null,
    "n": 0
   },
   {
    "band": "120 m² et +",
    "median": null,
    "n": 0
   }
  ],
  "Maison": [
   {
    "band": "< 30 m²",
    "median": null,
    "n": 0
   },
   {
    "band": "30-60 m²",
    "median": 3889,
    "n": 3
   },
   {
    "band": "60-90 m²",
    "median": 2537,
    "n": 15
   },
   {
    "band": "90-120 m²",
    "median": 2515,
    "n": 12
   },
   {
    "band": "120 m² et +",
    "median": 2077,
    "n": 8
   }
  ]
 },
 "est_hub_arrondissements": false,
 "arrondissements": null,
 "source": {
  "dataset": "Demandes de valeurs foncières (DVF), DGFiP",
  "url": "https://www.data.gouv.fr/fr/datasets/demandes-de-valeurs-foncieres/",
  "licence": "Licence Ouverte 2.0",
  "methodologie": "https://foncierdata.fr/methodologie"
 },
 "page": "https://foncierdata.fr/prix-immobilier/60143-chaumont-en-vexin"
}