diff --git a/inventree/build.py b/inventree/build.py
index 8bc0c5e..d20fb3d 100644
--- a/inventree/build.py
+++ b/inventree/build.py
@@ -2,6 +2,7 @@
 
 import inventree.base
 import inventree.report
+import inventree.stock
 
 
 class Build(
@@ -48,3 +49,41 @@ def complete(
     def finish(self, *args, **kwargs):
         """Alias for complete"""
         return self.complete(*args, **kwargs)
+
+    def getLines(self, **kwargs):
+        """ Return the build line items associated with this build order """
+        return BuildLine.list(self._api, build=self.pk, **kwargs)
+
+
+class BuildLine(
+    inventree.base.InventreeObject,
+):
+    """ Class representing the BuildLine database model """
+
+    URL = 'build/line/'
+    MODEL_TYPE = 'buildline'
+
+    def getBuild(self):
+        """Return the Build object associated with this line item"""
+        return Build(self._api, self.build)
+
+
+class BuildItem(
+    inventree.base.InventreeObject,
+):
+    """ Class representing the BuildItem database model """
+
+    URL = 'build/item/'
+    MODEL_TYPE = 'builditem'
+
+    def getBuild(self):
+        """Return the Build object associated with this build item"""
+        return Build(self._api, self.build)
+
+    def getBuildLine(self):
+        """Return the BuildLine object associated with this build item"""
+        return BuildLine(self._api, self.build_line)
+    
+    def getStockItem(self):
+        """Return the StockItem object associated with this build item"""
+        return inventree.stock.StockItem(self._api, self.stock_item)
diff --git a/test/test_build.py b/test/test_build.py
index 45929bb..f7db883 100644
--- a/test/test_build.py
+++ b/test/test_build.py
@@ -36,9 +36,9 @@ def get_build(self):
                 self.api,
                 {
                     "title": "Automated test build",
-                    "part": 25,
+                    "part": 100,
                     "quantity": 100,
-                    "reference": f"BO-{n+1:04d}",
+                    "reference": f"BO-{n + 1:04d}",
                 }
             )
         else:
@@ -93,7 +93,7 @@ def test_build_cancel(self):
                 "title": "Automated test build",
                 "part": 25,
                 "quantity": 100,
-                "reference": f"BO-{n+1:04d}"
+                "reference": f"BO-{n + 1:04d}"
             }
         )
 
@@ -118,7 +118,7 @@ def test_build_complete(self):
                 "title": "Automated test build",
                 "part": 25,
                 "quantity": 100,
-                "reference": f"BO-{n+1:04d}"
+                "reference": f"BO-{n + 1:04d}"
             }
         )