{"design":{"construction_jpy":36750000,"floors":2,"gross_floor_m2":105.0,"rooms":"1F LDK 大開口 + 浴室、2F 寝室×2 + 仕事部屋","structure":"木造軸組 + ペレットストーブ + 床下蓄熱コンクリート 200mm + UA 0.40 (G2 上位)","title":"山梨県北杜市大泉町 — 八ヶ岳南麓","total_jpy":42150000},"files":{"ifc":"/api/showcase/1hour-yatsugatake/bim.ifc","image":"/api/showcase/1hour-yatsugatake/image","json":"/api/showcase/1hour-yatsugatake/bim.json"},"schema":"BIM.HOUSE Real Listing v1","site":{"address":"山梨県北杜市大泉町西井出 (甲斐大泉駅 徒歩 12 分)","land_area_m2":660.0,"land_price_jpy":5400000,"lot_d_m":30.0,"lot_w_m":22.0,"zoning":"別荘地 (用途地域指定なし)"},"source":{"fetched_at":"2026-05-09","type":"SUUMO public listing","url":"https://suumo.jp/tochi/yamanashi/sc_hokuto/"},"validation":{"geometry_includes":["Project + Site + Building hierarchy","2 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"]}}