{
 "code_insee": "77079",
 "nom": "Champagne-sur-Seine",
 "departement": "77",
 "annee_reference": 2025,
 "prix_m2_median": 2377,
 "prix_m2_median_appartement": 2377,
 "prix_m2_median_appartement_yoy_pct": 5.5,
 "prix_m2_median_maison": 2377,
 "prix_m2_median_maison_yoy_pct": -7.4,
 "prix_vente_median": 170000,
 "ventes_annee_reference": 56,
 "ventes_5_ans": 314,
 "fiabilite": "Modérée",
 "derniers_12_mois": {
  "debut": "2025-07-01",
  "fin": "2026-06-30",
  "ventes": 73,
  "prix_m2_median": 2387,
  "prix_m2_median_appartement": 2380,
  "prix_m2_median_appartement_yoy_pct": 4.7,
  "prix_m2_median_maison": 2408,
  "prix_m2_median_maison_yoy_pct": -4.9
 },
 "series_annuelles": [
  {
   "annee": 2021,
   "apt": 2391,
   "apt_n": 15,
   "maison": 2472,
   "maison_n": 30
  },
  {
   "annee": 2022,
   "apt": 2549,
   "apt_n": 22,
   "maison": 2418,
   "maison_n": 45
  },
  {
   "annee": 2023,
   "apt": 2542,
   "apt_n": 21,
   "maison": 2626,
   "maison_n": 50
  },
  {
   "annee": 2024,
   "apt": 2253,
   "apt_n": 6,
   "maison": 2567,
   "maison_n": 34
  },
  {
   "annee": 2025,
   "apt": 2377,
   "apt_n": 22,
   "maison": 2377,
   "maison_n": 34
  }
 ],
 "tranches_surface": {
  "Appartement": [
   {
    "band": "< 30 m²",
    "median": 1552,
    "n": 3
   },
   {
    "band": "30-60 m²",
    "median": 2375,
    "n": 19
   },
   {
    "band": "60-90 m²",
    "median": 2470,
    "n": 5
   },
   {
    "band": "90-120 m²",
    "median": 291,
    "n": 1
   },
   {
    "band": "120 m² et +",
    "median": null,
    "n": 0
   }
  ],
  "Maison": [
   {
    "band": "< 30 m²",
    "median": null,
    "n": 0
   },
   {
    "band": "30-60 m²",
    "median": 3007,
    "n": 8
   },
   {
    "band": "60-90 m²",
    "median": 2558,
    "n": 36
   },
   {
    "band": "90-120 m²",
    "median": 2098,
    "n": 15
   },
   {
    "band": "120 m² et +",
    "median": 2080,
    "n": 9
   }
  ]
 },
 "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/77079-champagne-sur-seine"
}