{"design":{"construction_jpy":75800000,"floors":3,"gross_floor_m2":158.0,"rooms":"B1F 防音スタジオ 35㎡、1F LDK + 浴室、2F 寝室×2 + ロフト","structure":"B1F RC 壁式 (防音 D-65 浮構造) + 1-2F 木造軸組 + 地下空調 全館換気 + 樹脂サッシ","title":"中野区中野 4 — 地下スタジオ + 住居","total_jpy":213800000},"files":{"ifc":"/api/showcase/bim-nakano/bim.ifc","image":"/api/showcase/bim-nakano/image","json":"/api/showcase/bim-nakano/bim.json"},"schema":"BIM.HOUSE Real Listing v1","site":{"address":"東京都中野区中野 4 丁目 (中野駅 徒歩 9 分)","land_area_m2":88.2,"land_price_jpy":138000000,"lot_d_m":11.8,"lot_w_m":7.5,"zoning":"近隣商業地域 (建ぺい 80%・容積 300%)"},"source":{"fetched_at":"2026-05-09","type":"SUUMO public listing","url":"https://suumo.jp/tochi/tokyo/sc_nakano/"},"validation":{"geometry_includes":["Project + Site + Building hierarchy","3 storeys with slab + 4 walls each","1 entrance door (south wall, ground floor)","IfcRelContainedInSpatialStructure links per storey"],"ifc4_compliant":true,"tested_with":["FreeCAD 1.0","IfcOpenShell 0.7.0"]}}