{
 "code_insee": "78220",
 "nom": "Les Essarts-le-Roi",
 "departement": "78",
 "annee_reference": 2025,
 "prix_m2_median": 3148,
 "prix_m2_median_appartement": 2790,
 "prix_m2_median_appartement_yoy_pct": -4.4,
 "prix_m2_median_maison": 3194,
 "prix_m2_median_maison_yoy_pct": -1.6,
 "prix_vente_median": 309447,
 "ventes_annee_reference": 46,
 "ventes_5_ans": 320,
 "fiabilite": "Modérée",
 "derniers_12_mois": {
  "debut": "2025-07-01",
  "fin": "2026-06-30",
  "ventes": 54,
  "prix_m2_median": 3284,
  "prix_m2_median_appartement": 2796,
  "prix_m2_median_appartement_yoy_pct": -1.8,
  "prix_m2_median_maison": 3428,
  "prix_m2_median_maison_yoy_pct": 8.4
 },
 "series_annuelles": [
  {
   "annee": 2021,
   "apt": 3061,
   "apt_n": 13,
   "maison": 3373,
   "maison_n": 33
  },
  {
   "annee": 2022,
   "apt": 3387,
   "apt_n": 25,
   "maison": 3714,
   "maison_n": 55
  },
  {
   "annee": 2023,
   "apt": 3013,
   "apt_n": 20,
   "maison": 3773,
   "maison_n": 44
  },
  {
   "annee": 2024,
   "apt": 2917,
   "apt_n": 25,
   "maison": 3247,
   "maison_n": 34
  },
  {
   "annee": 2025,
   "apt": 2790,
   "apt_n": 11,
   "maison": 3194,
   "maison_n": 35
  }
 ],
 "tranches_surface": {
  "Appartement": [
   {
    "band": "< 30 m²",
    "median": 4000,
    "n": 3
   },
   {
    "band": "30-60 m²",
    "median": 3429,
    "n": 11
   },
   {
    "band": "60-90 m²",
    "median": 2786,
    "n": 16
   },
   {
    "band": "90-120 m²",
    "median": 2704,
    "n": 6
   },
   {
    "band": "120 m² et +",
    "median": null,
    "n": 0
   }
  ],
  "Maison": [
   {
    "band": "< 30 m²",
    "median": 7586,
    "n": 1
   },
   {
    "band": "30-60 m²",
    "median": 3175,
    "n": 3
   },
   {
    "band": "60-90 m²",
    "median": 3648,
    "n": 20
   },
   {
    "band": "90-120 m²",
    "median": 3308,
    "n": 20
   },
   {
    "band": "120 m² et +",
    "median": 3073,
    "n": 25
   }
  ]
 },
 "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/78220-les-essarts-le-roi"
}