diff --git a/hub/catalog_factories/cost/montreal_custom_catalog.py b/hub/catalog_factories/cost/montreal_custom_catalog.py
index 4624e13b..a0679b89 100644
--- a/hub/catalog_factories/cost/montreal_custom_catalog.py
+++ b/hub/catalog_factories/cost/montreal_custom_catalog.py
@@ -36,9 +36,9 @@ class MontrealCustomCatalog(Catalog):
     _lifetime = float(entry[item_type]['lifetime_equipment']['#text'])
     _item_description = ItemDescription(item_type,
                                         initial_investment=_investment,
-                                        initial_investment_units=_investment_unit,
+                                        initial_investment_unit=_investment_unit,
                                         reposition=_reposition,
-                                        reposition_units=_reposition_unit,
+                                        reposition_unit=_reposition_unit,
                                         lifetime=_lifetime)
     return _item_description
 
@@ -48,7 +48,7 @@ class MontrealCustomCatalog(Catalog):
     _refurbishment_unit = entry[item_type]['refurbishment_cost']['@cost_unit']
     _item_description = ItemDescription(item_type,
                                         refurbishment=_refurbishment,
-                                        refurbishment_units=_refurbishment_unit)
+                                        refurbishment_unit=_refurbishment_unit)
     return _item_description
 
   def _get_capital_costs(self, entry):
@@ -140,7 +140,7 @@ class MontrealCustomCatalog(Catalog):
                       hvac_subsidy=hvac,
                       photovoltaic_subsidy=photovoltaic_system,
                       electricity_export=electricity_exports,
-                      reductions_taxes=reduction_tax)
+                      reductions_tax=reduction_tax)
       _catalog_archetypes.append(Archetype(lod,
                                            function,
                                            municipality,
diff --git a/hub/catalog_factories/data_models/cost/chapter.py b/hub/catalog_factories/data_models/cost/chapter.py
index d1be68ac..bf393cbb 100644
--- a/hub/catalog_factories/data_models/cost/chapter.py
+++ b/hub/catalog_factories/data_models/cost/chapter.py
@@ -10,10 +10,10 @@ from hub.catalog_factories.data_models.cost.item_description import ItemDescript
 
 
 class Chapter:
-  def __init__(self, chapter_type, items_list):
+  def __init__(self, chapter_type, items):
 
     self._chapter_type = chapter_type
-    self._items_list = items_list
+    self._items = items
 
   @property
   def chapter_type(self):
@@ -24,9 +24,9 @@ class Chapter:
     return self._chapter_type
 
   @property
-  def items_list(self) -> List[ItemDescription]:
+  def items(self) -> List[ItemDescription]:
     """
     Get list of items contained in the chapter
     :return: [str]
     """
-    return self._items_list
+    return self._items
diff --git a/hub/catalog_factories/data_models/cost/cost_helper.py b/hub/catalog_factories/data_models/cost/cost_helper.py
index c51ab02b..fb0d551e 100644
--- a/hub/catalog_factories/data_models/cost/cost_helper.py
+++ b/hub/catalog_factories/data_models/cost/cost_helper.py
@@ -26,15 +26,9 @@ class CostHelper:
   }
 
   _chapters_in_lod1 = {
-    'B10_superstructure': cte.SUPERSTRUCTURE,
-    'B20_envelope': cte.ENVELOPE,
-    'B30_roofing': cte.ROOFING,
-    'D3010_energy_supply': cte.ENERGY_SUPPLY,
-    'D3020_heat_generating_systems': cte.HEAT_GENERATION,
-    'D3030_cooling_generation_systems': cte.COOL_GENERATION,
-    'D3040_distribution_systems': cte.DISTRIBUTION,
-    'D3080_other_hvac_ahu': cte.OTHER_SYSTEMS,
-    'D5020lighting_and_branch_wiring': cte.LIGHTING_AND_WIRING
+    'B_shell': cte.SUPERSTRUCTURE,
+    'D_services': cte.ENVELOPE,
+    'Z_allowances_overhead_profit': cte.ALLOWANCES_OVERHEAD_PROFIT
   }
 
   @property
diff --git a/hub/catalog_factories/data_models/cost/income.py b/hub/catalog_factories/data_models/cost/income.py
index baa880ec..0a8c0442 100644
--- a/hub/catalog_factories/data_models/cost/income.py
+++ b/hub/catalog_factories/data_models/cost/income.py
@@ -13,13 +13,13 @@ class Income:
                hvac_subsidy=None,
                photovoltaic_subsidy=None,
                electricity_export=None,
-               reductions_taxes=None):
+               reductions_tax=None):
 
     self._construction_subsidy = construction_subsidy
     self._hvac_subsidy = hvac_subsidy
     self._photovoltaic_subsidy = photovoltaic_subsidy
     self._electricity_export = electricity_export
-    self._reductions_taxes = reductions_taxes
+    self._reductions_tax = reductions_tax
 
   @property
   def construction_subsidy(self) -> Union[None, float]:
@@ -54,9 +54,9 @@ class Income:
     return self._construction_subsidy
 
   @property
-  def reductions_taxes(self) -> Union[None, float]:
+  def reductions_tax(self) -> Union[None, float]:
     """
     Get reduction in taxes in percentage (-)
     :return: None or float
     """
-    return self._reductions_taxes
+    return self._reductions_tax
diff --git a/hub/catalog_factories/data_models/cost/item_description.py b/hub/catalog_factories/data_models/cost/item_description.py
index 345e04b7..42ce94b4 100644
--- a/hub/catalog_factories/data_models/cost/item_description.py
+++ b/hub/catalog_factories/data_models/cost/item_description.py
@@ -11,20 +11,20 @@ from typing import Union
 class ItemDescription:
   def __init__(self, item_type,
                initial_investment=None,
-               initial_investment_units=None,
+               initial_investment_unit=None,
                refurbishment=None,
-               refurbishment_units=None,
+               refurbishment_unit=None,
                reposition=None,
-               reposition_units=None,
+               reposition_unit=None,
                lifetime=None):
 
     self._item_type = item_type
     self._initial_investment = initial_investment
-    self._initial_investment_units = initial_investment_units
+    self._initial_investment_unit = initial_investment_unit
     self._refurbishment = refurbishment
-    self._refurbishment_units = refurbishment_units
+    self._refurbishment_unit = refurbishment_unit
     self._reposition = reposition
-    self._reposition_units = reposition_units
+    self._reposition_unit = reposition_unit
     self._lifetime = lifetime
 
   @property
@@ -41,7 +41,7 @@ class ItemDescription:
     Get initial investment of the specific item in given units
     :return: None, None or float, str
     """
-    return self._initial_investment, self._initial_investment_units
+    return self._initial_investment, self._initial_investment_unit
 
   @property
   def refurbishment(self) -> Union[(None, None), (float, str)]:
@@ -49,7 +49,7 @@ class ItemDescription:
     Get refurbishment costs of the specific item in given units
     :return: None, None or float, str
     """
-    return self._refurbishment, self._refurbishment_units
+    return self._refurbishment, self._refurbishment_unit
 
   @property
   def reposition(self) -> Union[(None, None), (float, str)]:
@@ -57,7 +57,7 @@ class ItemDescription:
     Get reposition costs of the specific item in given units
     :return: None, None or float, str
     """
-    return self._reposition, self._reposition_units
+    return self._reposition, self._reposition_unit
 
   @property
   def lifetime(self) -> Union[None, float]:
diff --git a/hub/helpers/constants.py b/hub/helpers/constants.py
index b67bd61a..2caaee0d 100644
--- a/hub/helpers/constants.py
+++ b/hub/helpers/constants.py
@@ -171,12 +171,6 @@ CURRENCY_PER_CBM_PER_HOUR = 'currency/(m3/h)'
 PERCENTAGE = '%'
 
 # Costs chapters
-SUPERSTRUCTURE = 'B10_superstructure'
-ENVELOPE = 'B20_envelope'
-ROOFING = 'B30_roofing'
-ENERGY_SUPPLY = 'D3010_energy_supply'
-HEAT_GENERATION = 'D3020_heat_generating_systems'
-COOL_GENERATION = 'D3030_cooling_generation_systems'
-DISTRIBUTION = 'D3040_distribution_systems'
-OTHER_SYSTEMS = 'D3080_other_hvac_ahu'
-LIGHTING_AND_WIRING = 'D5020lighting_and_branch_wiring'
+SUPERSTRUCTURE = 'B_shell'
+ENVELOPE = 'D_services'
+ALLOWANCES_OVERHEAD_PROFIT = 'Z_allowances_overhead_profit'