diff --git a/backend/condition/domain/asset_condition.py b/backend/condition/domain/asset_condition.py
new file mode 100644
index 00000000..df87fd9f
--- /dev/null
+++ b/backend/condition/domain/asset_condition.py
@@ -0,0 +1,11 @@
+from dataclasses import dataclass
+from typing import Optional
+
+from backend.condition.domain.element import Element
+
+@dataclass
+class AssetCondition:
+    uprn: int
+    element: Element
+    condition_description: str
+    renewal_year: Optional[int] = None
\ No newline at end of file
diff --git a/backend/condition/domain/element.py b/backend/condition/domain/element.py
new file mode 100644
index 00000000..89246f9c
--- /dev/null
+++ b/backend/condition/domain/element.py
@@ -0,0 +1,4 @@
+from enum import Enum
+
+class Element(Enum):
+    pass
\ No newline at end of file
diff --git a/backend/condition/domain/mapping/lbwf_mapper.py b/backend/condition/domain/mapping/lbwf_mapper.py
new file mode 100644
index 00000000..154f3db4
--- /dev/null
+++ b/backend/condition/domain/mapping/lbwf_mapper.py
@@ -0,0 +1,9 @@
+from typing import Any, List
+from backend.condition.domain.asset_condition import AssetCondition
+from backend.condition.domain.mapping.mapper import Mapper
+
+
+class LbwfMapper(Mapper):
+    
+    def map_asset_conditions(self, client_data: List[Any]) -> List[AssetCondition]:
+        raise NotImplementedError
\ No newline at end of file
diff --git a/backend/condition/domain/mapping/mapper.py b/backend/condition/domain/mapping/mapper.py
new file mode 100644
index 00000000..b314e01c
--- /dev/null
+++ b/backend/condition/domain/mapping/mapper.py
@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+from typing import Any, List
+
+from backend.condition.domain.asset_condition import AssetCondition
+
+class Mapper(ABC):
+
+    @abstractmethod
+    def map_asset_conditions(self, client_data: List[Any]) -> List[AssetCondition]:
+        #TODO: client_data should be properly typed
+        pass
\ No newline at end of file
diff --git a/backend/condition/parsing/records/lbwf/lbwf_asset_condition.py b/backend/condition/parsing/records/lbwf/lbwf_asset_condition.py
index dffd1e53..2b4c4992 100644
--- a/backend/condition/parsing/records/lbwf/lbwf_asset_condition.py
+++ b/backend/condition/parsing/records/lbwf/lbwf_asset_condition.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 from datetime import date
+from typing import Optional
 
 
 @dataclass
@@ -16,11 +17,11 @@ class LbwfAssetCondition:
     element_code_description: str
     attribute_code: str
     attribute_code_description: str
-    element_date_value: str | None = None
-    element_numerical_value: int | None = None
-    element_text_value: str | None = None
-    quantity: int | None = None
-    install_date: date | None = None
-    remaining_life: int | None = None
-    element_comments: str | None = None
+    element_date_value: Optional[str] = None
+    element_numerical_value: Optional[int] = None
+    element_text_value: Optional[str] = None
+    quantity: Optional[int] = None
+    install_date: Optional[date] = None
+    remaining_life: Optional[int] = None
+    element_comments: Optional[str] = None
 
diff --git a/backend/condition/parsing/records/lbwf/lbwf_house.py b/backend/condition/parsing/records/lbwf/lbwf_house.py
index 6db16862..3b472fbe 100644
--- a/backend/condition/parsing/records/lbwf/lbwf_house.py
+++ b/backend/condition/parsing/records/lbwf/lbwf_house.py
@@ -8,8 +8,8 @@ class LbwfHouse:
     uprn: int
     reference: int
     address: str
-    epc: str # TODO: make enum
-    shdf: bool
+    epc: str # TODO: make enum?
+    shdf: str
     house: str
     fail_decency: int
     assets: List[LbwfAssetCondition]
\ No newline at end of file