diff --git a/src/Build/BackEnd/BuildManager/BuildSubmission.cs b/src/Build/BackEnd/BuildManager/BuildSubmission.cs
index e96185fc640..1dba5f10f78 100644
--- a/src/Build/BackEnd/BuildManager/BuildSubmission.cs
+++ b/src/Build/BackEnd/BuildManager/BuildSubmission.cs
@@ -202,6 +202,16 @@ public override BuildResult Execute()
             return BuildResult!;
         }
 
+        /// <summary>
+        /// Whether the build has started.
+        /// </summary>
+        internal override bool IsStarted
+        {
+            get => BuildRequest != null;
+            // Ignore the set - the submission is started once the BuildRequest is set.
+            set { }
+        }
+
         protected internal override BuildResult CreateFailedResult(Exception exception)
         {
             ErrorUtilities.VerifyThrow(BuildRequest != null,
diff --git a/src/Build/BackEnd/BuildManager/BuildSubmissionBase.cs b/src/Build/BackEnd/BuildManager/BuildSubmissionBase.cs
index ba6f45afc09..1cf4819c51d 100644
--- a/src/Build/BackEnd/BuildManager/BuildSubmissionBase.cs
+++ b/src/Build/BackEnd/BuildManager/BuildSubmissionBase.cs
@@ -77,7 +77,7 @@ protected internal BuildSubmissionBase(BuildManager buildManager, int submission
         /// <summary>
         /// Whether the build has started.
         /// </summary>
-        internal bool IsStarted { get; set; }
+        internal abstract bool IsStarted { get; set; }
 
         /// <summary>
         /// Indicates that all logging events for this submission are complete.
diff --git a/src/Build/Graph/GraphBuildSubmission.cs b/src/Build/Graph/GraphBuildSubmission.cs
index 270134614f5..164cfc8e377 100644
--- a/src/Build/Graph/GraphBuildSubmission.cs
+++ b/src/Build/Graph/GraphBuildSubmission.cs
@@ -71,6 +71,11 @@ protected internal override void CheckResultValidForCompletion(GraphBuildResult
         protected internal override GraphBuildResult CreateFailedResult(Exception exception)
             => new(SubmissionId, exception);
 
+        /// <summary>
+        /// Whether the build has started.
+        /// </summary>
+        internal override bool IsStarted { get; set; }
+
         // WARNING!: Do not remove the below proxy properties.
         //  They are required to make the OM forward compatible
         //  (code built against this OM should run against binaries with previous version of OM).