diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98d308f0..b225eeaf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Changelog for Cass Operator, new PRs should update the `main / unreleased` secti
 
 ## unreleased
 
+* [ENHANCEMENT] [#922](https://github.com/k8ssandra/cass-operator/issues/922) Allow VolumeAttributesClassName changes in storageConfig webhook to support in-place EBS volume performance class updates on AWS
 * [ENHANCEMENT] [#912](https://github.com/k8ssandra/cass-operator/issues/912) Add new webhook validations for maxUnavailable string format as well as PVC sizes
 * [ENHANCEMENT] [#902](https://github.com/k8ssandra/cass-operator/issues/902) If scaling down or scaling up process is still ongoing, the webhook will prevent changing the cluster size.
 
diff --git a/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook.go b/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook.go
index 99766b2a..e5e570ca 100644
--- a/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook.go
+++ b/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook.go
@@ -204,12 +204,15 @@ func ValidateDatacenterFieldChanges(oldDc *api.CassandraDatacenter, newDc *api.C
 			return attemptedTo(
 				"shrink storageConfig.CassandraDataVolumeClaimSpec from %s to %s", oldStorageRequest.String(), newStorageRequest.String())
 		}
-	}
 
-	// CassandraDataVolumeClaimSpec changes are disallowed
-	if metav1.HasAnnotation(newDc.ObjectMeta, api.AllowStorageChangesAnnotation) && newDc.Annotations[api.AllowStorageChangesAnnotation] == "true" {
-		// If the AllowStorageChangesAnnotation is set, we allow changes to the CassandraDataVolumeClaimSpec sizes, but not other fields
-		oldClaimSpec.Resources.Requests = newClaimSpec.Resources.Requests
+		if metav1.HasAnnotation(newDc.ObjectMeta, api.AllowStorageChangesAnnotation) && newDc.Annotations[api.AllowStorageChangesAnnotation] == "true" {
+			// If the AllowStorageChangesAnnotation is set, we allow changes to the CassandraDataVolumeClaimSpec sizes, but not other fields
+			oldClaimSpec.Resources.Requests = newClaimSpec.Resources.Requests
+		}
+
+		// VolumeAttributesClassName changes are always allowed as they represent in-place volume
+		// performance class changes (e.g. AWS EBS VolumeAttributesClass) and do not replace the PVC.
+		oldClaimSpec.VolumeAttributesClassName = newClaimSpec.VolumeAttributesClassName
 	}
 
 	if !apiequality.Semantic.DeepEqual(oldClaimSpec, newClaimSpec) {
diff --git a/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook_test.go b/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook_test.go
index b805a835..1df29d8a 100644
--- a/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook_test.go
+++ b/internal/webhooks/cassandra/v1beta1/cassandradatacenter_webhook_test.go
@@ -786,6 +786,82 @@ func Test_ValidateDatacenterFieldChanges(t *testing.T) {
 			},
 			errString: "",
 		},
+		{
+			name: "VolumeAttributesClassName change is allowed",
+			oldDc: &api.CassandraDatacenter{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "exampleDC",
+				},
+				Spec: api.CassandraDatacenterSpec{
+					StorageConfig: api.StorageConfig{
+						CassandraDataVolumeClaimSpec: &corev1.PersistentVolumeClaimSpec{
+							StorageClassName:          storageName,
+							AccessModes:               []corev1.PersistentVolumeAccessMode{"ReadWriteOnce"},
+							VolumeAttributesClassName: ptr.To[string]("gp3-cassandra-general"),
+							Resources: corev1.VolumeResourceRequirements{
+								Requests: map[corev1.ResourceName]resource.Quantity{"storage": storageSize},
+							},
+						},
+					},
+				},
+			},
+			newDc: &api.CassandraDatacenter{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "exampleDC",
+				},
+				Spec: api.CassandraDatacenterSpec{
+					StorageConfig: api.StorageConfig{
+						CassandraDataVolumeClaimSpec: &corev1.PersistentVolumeClaimSpec{
+							StorageClassName:          storageName,
+							AccessModes:               []corev1.PersistentVolumeAccessMode{"ReadWriteOnce"},
+							VolumeAttributesClassName: ptr.To[string]("gp3-cassandra"),
+							Resources: corev1.VolumeResourceRequirements{
+								Requests: map[corev1.ResourceName]resource.Quantity{"storage": storageSize},
+							},
+						},
+					},
+				},
+			},
+			errString: "",
+		},
+		{
+			name: "VolumeAttributesClassName change with other field change is rejected",
+			oldDc: &api.CassandraDatacenter{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "exampleDC",
+				},
+				Spec: api.CassandraDatacenterSpec{
+					StorageConfig: api.StorageConfig{
+						CassandraDataVolumeClaimSpec: &corev1.PersistentVolumeClaimSpec{
+							StorageClassName:          storageName,
+							AccessModes:               []corev1.PersistentVolumeAccessMode{"ReadWriteOnce"},
+							VolumeAttributesClassName: ptr.To[string]("gp3-cassandra-general"),
+							Resources: corev1.VolumeResourceRequirements{
+								Requests: map[corev1.ResourceName]resource.Quantity{"storage": storageSize},
+							},
+						},
+					},
+				},
+			},
+			newDc: &api.CassandraDatacenter{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "exampleDC",
+				},
+				Spec: api.CassandraDatacenterSpec{
+					StorageConfig: api.StorageConfig{
+						CassandraDataVolumeClaimSpec: &corev1.PersistentVolumeClaimSpec{
+							StorageClassName:          storageName,
+							AccessModes:               []corev1.PersistentVolumeAccessMode{"ReadWriteMany"},
+							VolumeAttributesClassName: ptr.To[string]("gp3-cassandra"),
+							Resources: corev1.VolumeResourceRequirements{
+								Requests: map[corev1.ResourceName]resource.Quantity{"storage": storageSize},
+							},
+						},
+					},
+				},
+			},
+			errString: "change storageConfig.CassandraDataVolumeClaimSpec",
+		},
 		{
 			name: "Removing a rack",
 			oldDc: &api.CassandraDatacenter{