{
 "code_insee": "78297",
 "nom": "Guyancourt",
 "departement": "78",
 "annee_reference": 2025,
 "prix_m2_median": 3859,
 "prix_m2_median_appartement": 3670,
 "prix_m2_median_appartement_yoy_pct": -0.4,
 "prix_m2_median_maison": 4191,
 "prix_m2_median_maison_yoy_pct": -0.2,
 "prix_vente_median": 281450,
 "ventes_annee_reference": 191,
 "ventes_5_ans": 1107,
 "fiabilite": "Forte",
 "series_annuelles": [
  {
   "annee": 2021,
   "apt": 3844,
   "apt_n": 220,
   "maison": 4274,
   "maison_n": 73
  },
  {
   "annee": 2022,
   "apt": 3839,
   "apt_n": 202,
   "maison": 4409,
   "maison_n": 78
  },
  {
   "annee": 2023,
   "apt": 3932,
   "apt_n": 154,
   "maison": 4290,
   "maison_n": 43
  },
  {
   "annee": 2024,
   "apt": 3684,
   "apt_n": 107,
   "maison": 4199,
   "maison_n": 39
  },
  {
   "annee": 2025,
   "apt": 3670,
   "apt_n": 134,
   "maison": 4191,
   "maison_n": 57
  }
 ],
 "tranches_surface": {
  "Appartement": [
   {
    "band": "< 30 m²",
    "median": 5414,
    "n": 12
   },
   {
    "band": "30-60 m²",
    "median": 4146,
    "n": 71
   },
   {
    "band": "60-90 m²",
    "median": 3553,
    "n": 126
   },
   {
    "band": "90-120 m²",
    "median": 3401,
    "n": 28
   },
   {
    "band": "120 m² et +",
    "median": 3276,
    "n": 4
   }
  ],
  "Maison": [
   {
    "band": "< 30 m²",
    "median": null,
    "n": 0
   },
   {
    "band": "30-60 m²",
    "median": 6618,
    "n": 1
   },
   {
    "band": "60-90 m²",
    "median": 4373,
    "n": 29
   },
   {
    "band": "90-120 m²",
    "median": 4194,
    "n": 40
   },
   {
    "band": "120 m² et +",
    "median": 3934,
    "n": 26
   }
  ]
 },
 "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/78297-guyancourt"
}