diff --git a/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/HostApp/ArcGISColorUnpacker.cs b/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/HostApp/ArcGISColorUnpacker.cs
index 1f9046db3..06d700ae1 100644
--- a/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/HostApp/ArcGISColorUnpacker.cs
+++ b/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/HostApp/ArcGISColorUnpacker.cs
@@ -1,5 +1,4 @@
 using ArcGIS.Desktop.Mapping;
-using Speckle.Converters.ArcGIS3.Extensions;
 using Speckle.Sdk.Models.Proxies;
 
 namespace Speckle.Connectors.ArcGIS.HostApp;
@@ -121,10 +120,8 @@ public void StoreRenderer(ADM.LasDatasetLayer lasLayer)
   /// POC: logic probably can be combined with ProcessFeatureLayerColor.
   /// </summary>
   /// <param name="point"></param>
-  public void ProcessLasLayerColor(ACD.Analyst3D.LasPoint point)
+  public void ProcessLasLayerColor(ACD.Analyst3D.LasPoint point, string pointApplicationId)
   {
-    string pointApplicationId = point.GetSpeckleApplicationId();
-
     // get the color from the renderer and point
     AC.CIM.CIMColor? color;
     switch (StoredTinRenderer)
@@ -180,10 +177,8 @@ ACD.Analyst3D.LasPoint point
   /// <param name="row"></param>
   /// <returns></returns>
   /// <exception cref="ACD.Exceptions.GeodatabaseException"></exception>
-  public void ProcessFeatureLayerColor(ACD.Row row)
+  public void ProcessFeatureLayerColor(ACD.Row row, string rowApplicationId)
   {
-    string rowApplicationId = row.GetSpeckleApplicationId();
-
     // if stored color is not null, this means the renderer was a simple renderer that applies to the entire layer, and was already created.
     // just add the row application id to the color proxy.
     if (StoredColor is int existingColorProxyId)
diff --git a/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/Operations/Send/ArcGISRootObjectBuilder.cs b/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/Operations/Send/ArcGISRootObjectBuilder.cs
index cfd59211c..8b77cee0d 100644
--- a/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/Operations/Send/ArcGISRootObjectBuilder.cs
+++ b/Connectors/ArcGIS/Speckle.Connectors.ArcGIS3/Operations/Send/ArcGISRootObjectBuilder.cs
@@ -1,3 +1,4 @@
+using ArcGIS.Core.Data.Raster;
 using ArcGIS.Core.Geometry;
 using ArcGIS.Desktop.Framework.Threading.Tasks;
 using Microsoft.Extensions.Logging;
@@ -12,6 +13,7 @@
 using Speckle.Converters.ArcGIS3;
 using Speckle.Converters.Common;
 using Speckle.Sdk;
+using Speckle.Sdk.Common.Exceptions;
 using Speckle.Sdk.Logging;
 using Speckle.Sdk.Models;
 using Speckle.Sdk.Models.Collections;
@@ -212,11 +214,15 @@ await QueuedTask
             // Same IDisposable issue appears to happen on Row class too. Docs say it should always be disposed of manually by the caller.
             using (ACD.Row row = rowCursor.Current)
             {
+              // get application id. test for subtypes before defaulting to base type.
               Base converted = _rootToSpeckleConverter.Convert(row);
+              string applicationId = GetSpeckleApplicationId(featureLayer, row);
+              converted.applicationId = applicationId;
+
               convertedObjects.Add(converted);
 
               // process the object color
-              _colorUnpacker.ProcessFeatureLayerColor(row);
+              _colorUnpacker.ProcessFeatureLayerColor(row, applicationId);
             }
           }
         }
@@ -233,7 +239,10 @@ private async Task<List<Base>> ConvertRasterLayerObjectsAsync(ADM.RasterLayer ra
     await QueuedTask
       .Run(() =>
       {
-        Base converted = _rootToSpeckleConverter.Convert(rasterLayer.GetRaster());
+        Raster raster = rasterLayer.GetRaster();
+        Base converted = _rootToSpeckleConverter.Convert(raster);
+        string applicationId = GetSpeckleApplicationId(rasterLayer, raster);
+        converted.applicationId = applicationId;
         convertedObjects.Add(converted);
       })
       .ConfigureAwait(false);
@@ -262,10 +271,12 @@ await QueuedTask
               using (ACD.Analyst3D.LasPoint pt = ptCursor.Current)
               {
                 Base converted = _rootToSpeckleConverter.Convert(pt);
+                string applicationId = GetSpeckleApplicationId(lasDatasetLayer, pt);
+                converted.applicationId = applicationId;
                 convertedObjects.Add(converted);
 
                 // process the object color
-                _colorUnpacker.ProcessLasLayerColor(pt);
+                _colorUnpacker.ProcessLasLayerColor(pt, applicationId);
               }
             }
           }
@@ -274,9 +285,29 @@ await QueuedTask
     }
     catch (ACD.Exceptions.TinException ex)
     {
-      throw new SpeckleException($"3D analyst extension is not enabled for .las layer operations", ex);
+      throw new SpeckleException("3D analyst extension is not enabled for .las layer operations", ex);
     }
 
     return convertedObjects;
   }
+
+  /// <summary>
+  /// Retrieves the Speckle application id for Features as a concatenation of the layer URI (applicationId)
+  /// and the row OID (index of row in layer) or point OID for LasDatasets.
+  /// </summary>
+  /// <exception cref="ACD.Exceptions.GeodatabaseException">Throws when this is *not* called on MCT. Use QueuedTask.Run.</exception>
+  public string GetSpeckleApplicationId(ADM.Layer layer, AC.CoreObjectsBase coreObject)
+  {
+    if (coreObject is ACD.Row row)
+    {
+      return $"{layer.URI}_{row.GetObjectID()}";
+    }
+
+    if (coreObject is ACD.Analyst3D.LasPoint point)
+    {
+      return $"{layer.URI}_{point.PointID}";
+    }
+
+    throw new ConversionNotSupportedException($"Conversion not supported for objects of type '{coreObject.GetType()}'");
+  }
 }
diff --git a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Extensions/SpeckleApplicationIdExtensions.cs b/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Extensions/SpeckleApplicationIdExtensions.cs
deleted file mode 100644
index 10a0f2aae..000000000
--- a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Extensions/SpeckleApplicationIdExtensions.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-namespace Speckle.Converters.ArcGIS3.Extensions;
-
-public static class SpeckleApplicationIdExtensions
-{
-  /// <summary>
-  /// Retrieves the Speckle application id for rows as a concatenation of the handle (generated from layer) and the row OID (index of row in layer)
-  /// </summary>
-  /// <exception cref="ACD.Exceptions.GeodatabaseException">Throws when this is *not* called on MCT. Use QueuedTask.Run.</exception>
-  public static string GetSpeckleApplicationId(this ACD.Row row) => $"{row.Handle}_{row.GetObjectID()}";
-
-  /// <summary>
-  /// Retrieves the Speckle application id for las points as a concatenation of the handle (generated from layer) and the point OID (record number of point in las layer)
-  /// </summary>
-  /// <exception cref="ACD.Exceptions.GeodatabaseException">Throws when this is *not* called on MCT. Use QueuedTask.Run.</exception>
-  public static string GetSpeckleApplicationId(this ACD.Analyst3D.LasPoint point) => $"{point.Handle}_{point.PointID}";
-
-  /// <summary>
-  /// Retrieves the Speckle application id for core objects bases as the handle (generated from layer)
-  /// </summary>
-  public static string GetSpeckleApplicationId(this AC.CoreObjectsBase coreObject) => $"{coreObject.Handle}";
-}
diff --git a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Speckle.Converters.ArcGIS3.csproj b/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Speckle.Converters.ArcGIS3.csproj
index 579e00a68..adbee8c0b 100644
--- a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Speckle.Converters.ArcGIS3.csproj
+++ b/Converters/ArcGIS/Speckle.Converters.ArcGIS3/Speckle.Converters.ArcGIS3.csproj
@@ -15,4 +15,8 @@
     <ProjectReference Include="..\..\..\Sdk\Speckle.Converters.Common\Speckle.Converters.Common.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Extensions\" />
+  </ItemGroup>
+
 </Project>
diff --git a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/TopLevel/CoreObjectsBaseToSpeckleTopLevelConverter.cs b/Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/TopLevel/CoreObjectsBaseToSpeckleTopLevelConverter.cs
index 66fc4973d..2bb4a2032 100644
--- a/Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/TopLevel/CoreObjectsBaseToSpeckleTopLevelConverter.cs
+++ b/Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/TopLevel/CoreObjectsBaseToSpeckleTopLevelConverter.cs
@@ -1,4 +1,3 @@
-using Speckle.Converters.ArcGIS3.Extensions;
 using Speckle.Converters.ArcGIS3.ToSpeckle.Helpers;
 using Speckle.Converters.Common;
 using Speckle.Converters.Common.Objects;
@@ -37,13 +36,6 @@ private ArcgisObject Convert(AC.CoreObjectsBase target)
     // get properties
     Dictionary<string, object?> properties = _propertiesExtractor.GetProperties(target);
 
-    // get application id. test for subtypes before defaulting to base type.
-    string applicationId = target is ACD.Row row
-      ? row.GetSpeckleApplicationId()
-      : target is ACD.Analyst3D.LasPoint point
-        ? point.GetSpeckleApplicationId()
-        : target.GetSpeckleApplicationId();
-
     ArcgisObject result =
       new()
       {
@@ -52,7 +44,7 @@ private ArcgisObject Convert(AC.CoreObjectsBase target)
         displayValue = display,
         properties = properties,
         units = _settingsStore.Current.SpeckleUnits,
-        applicationId = applicationId
+        applicationId = ""
       };
 
     return result;