You can now import cost schedules as CSVs into IFC in Blender

src/blenderbim/Makefile

@@ -118,6 +118,8 @@ endif
 	cp -r dist/working/IfcOpenShell-0.6.0/src/ifcpatch/ifcpatch dist/blenderbim/libs/site/packages/
 	# Provides IFC4D functionality
 	cp -r dist/working/IfcOpenShell-0.6.0/src/ifc4d/ifc4d dist/blenderbim/libs/site/packages/
+	# Provides IFC5D functionality
+	cp -r dist/working/IfcOpenShell-0.6.0/src/ifc5d/ifc5d dist/blenderbim/libs/site/packages/
 	rm -rf dist/working
 
 	# Provides Mustache templating in construction documentation

src/blenderbim/blenderbim/bim/module/cost/__init__.py

@@ -33,6 +33,7 @@ classes = (
     operator.CopyCostItemValues,
     operator.SelectCostItemProducts,
     operator.SelectCostScheduleProducts,
+    operator.ImportCostScheduleCsv,
     prop.CostItem,
     prop.BIMCostProperties,
     ui.BIM_PT_cost_schedules,
@@ -40,9 +41,15 @@ classes = (
 )
 
 
+def menu_func_import(self, context):
+    self.layout.operator(operator.ImportCostScheduleCsv.bl_idname, text="Cost Schedule (.csv)")
+
+
 def register():
     bpy.types.Scene.BIMCostProperties = bpy.props.PointerProperty(type=prop.BIMCostProperties)
+    bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
 
 
 def unregister():
     del bpy.types.Scene.BIMCostProperties
+    bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)

src/blenderbim/blenderbim/bim/module/cost/operator.py

@@ -1,10 +1,12 @@
 import os
 import bpy
 import json
+import time
 import ifcopenshell.api
 import blenderbim.bim.helper
 from blenderbim.bim.module.cost.prop import purge
 from blenderbim.bim.ifc import IfcStore
+from bpy_extras.io_utils import ImportHelper
 from ifcopenshell.api.cost.data import Data
 
 
@@ -650,3 +652,24 @@ class SelectCostScheduleProducts(bpy.types.Operator):
         self.related_products.extend(cost_item["Controls"])
         for child_id in cost_item["IsNestedBy"]:
             self.get_related_products(Data.cost_items[child_id])
+
+
+class ImportCostScheduleCsv(bpy.types.Operator, ImportHelper):
+    bl_idname = "import_cost_schedule_csv.bim"
+    bl_label = "Import Cost Schedule CSV"
+    bl_options = {"REGISTER", "UNDO"}
+    filename_ext = ".csv"
+    filter_glob: bpy.props.StringProperty(default="*.csv", options={"HIDDEN"})
+
+    def execute(self, context):
+        from ifc5d.csv2ifc import Csv2Ifc
+
+        self.file = IfcStore.get_file()
+        start = time.time()
+        csv2ifc = Csv2Ifc()
+        csv2ifc.csv = self.filepath
+        csv2ifc.file = self.file
+        csv2ifc.execute()
+        Data.load(IfcStore.get_file())
+        print("Import finished in {:.2f} seconds".format(time.time() - start))
+        return {"FINISHED"}

src/ifc5d/ifc5d/csv2ifc.py

@@ -77,6 +77,9 @@ class Csv2Ifc:
             if cost_item["CostValues"]:
                 cost_value = ifcopenshell.api.run("cost.add_cost_value", self.file, parent=cost_item["ifc"])
                 cost_value.AppliedValue = self.file.createIfcReal(cost_item["CostValues"])
+            else:
+                cost_value = ifcopenshell.api.run("cost.add_cost_value", self.file, parent=cost_item["ifc"])
+                cost_value.Category = "*"
             if cost_item["CostQuantities"]:
                 quantity_class = ifcopenshell.util.unit.get_symbol_quantity_class(cost_item["CostQuantitiesUnit"])
                 quantity = ifcopenshell.api.run(

src/ifcopenshell-python/ifcopenshell/api/cost/data.py

@@ -69,8 +69,12 @@ class Data:
         if cost_item.CostQuantities:
             quantity = cost_item.CostQuantities[0]
             unit = ifcopenshell.util.unit.get_property_unit(quantity, cls.file)
-            data["Unit"] = unit.id()
+            if unit:
-            data["UnitSymbol"] = ifcopenshell.util.unit.get_unit_symbol(unit)
+                data["Unit"] = unit.id()
+                data["UnitSymbol"] = ifcopenshell.util.unit.get_unit_symbol(unit)
+            else:
+                data["Unit"] = None
+                data["UnitSymbol"] = None
 
     @classmethod
     def load_cost_item_values(cls, cost_item, data):