Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs
===================================================================
diff -u -r5fae8cb70dd4efeb648c5ff5ee02c837a47172db -r7d922899412d52bcc7c2f1432589dfcd62d364b4
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs	(.../StructuresInputBaseProperties.cs)	(revision 5fae8cb70dd4efeb648c5ff5ee02c837a47172db)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs	(.../StructuresInputBaseProperties.cs)	(revision 7d922899412d52bcc7c2f1432589dfcd62d364b4)
@@ -569,14 +569,24 @@
         }
 
         [DynamicReadOnlyValidationMethod]
-        public virtual bool IsReadOnly(string property)
+        public bool IsReadOnly(string property)
         {
-            if (property == nameof(StructureNormalOrientation))
+            if (!HasStructure() && ShouldPropertyBeReadOnlyInAbsenseOfStructure(property))
             {
-                return !HasStructure();
+                return true;
             }
 
             return false;
         }
+
+        protected virtual bool ShouldPropertyBeReadOnlyInAbsenseOfStructure(string property)
+        {
+            if (nameof(StructureNormalOrientation).Equals(property))
+            {
+                return true;
+            }
+
+            return false;
+        }
     }
 }
\ No newline at end of file