{
 "code_insee": "78537",
 "nom": "Saint-Arnoult-en-Yvelines",
 "departement": "78",
 "annee_reference": 2025,
 "prix_m2_median": 3042,
 "prix_m2_median_appartement": 2814,
 "prix_m2_median_appartement_yoy_pct": 4.8,
 "prix_m2_median_maison": 3081,
 "prix_m2_median_maison_yoy_pct": -1.6,
 "prix_vente_median": 276000,
 "ventes_annee_reference": 55,
 "ventes_5_ans": 329,
 "fiabilite": "Modérée",
 "derniers_12_mois": {
  "debut": "2025-07-01",
  "fin": "2026-06-30",
  "ventes": 62,
  "prix_m2_median": 2946,
  "prix_m2_median_appartement": 3014,
  "prix_m2_median_appartement_yoy_pct": 11.1,
  "prix_m2_median_maison": 2933,
  "prix_m2_median_maison_yoy_pct": -2.8
 },
 "series_annuelles": [
  {
   "annee": 2021,
   "apt": 3180,
   "apt_n": 5,
   "maison": 3017,
   "maison_n": 38
  },
  {
   "annee": 2022,
   "apt": 2960,
   "apt_n": 24,
   "maison": 3146,
   "maison_n": 53
  },
  {
   "annee": 2023,
   "apt": 2747,
   "apt_n": 10,
   "maison": 3389,
   "maison_n": 46
  },
  {
   "annee": 2024,
   "apt": 2685,
   "apt_n": 18,
   "maison": 3131,
   "maison_n": 45
  },
  {
   "annee": 2025,
   "apt": 2814,
   "apt_n": 10,
   "maison": 3081,
   "maison_n": 45
  }
 ],
 "tranches_surface": {
  "Appartement": [
   {
    "band": "< 30 m²",
    "median": 2857,
    "n": 5
   },
   {
    "band": "30-60 m²",
    "median": 2814,
    "n": 14
   },
   {
    "band": "60-90 m²",
    "median": 2675,
    "n": 9
   },
   {
    "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": 3818,
    "n": 5
   },
   {
    "band": "60-90 m²",
    "median": 3521,
    "n": 30
   },
   {
    "band": "90-120 m²",
    "median": 3019,
    "n": 31
   },
   {
    "band": "120 m² et +",
    "median": 2512,
    "n": 24
   }
  ]
 },
 "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/78537-saint-arnoult-en-yvelines"
}