diff --git a/sdk/servicebus/service-bus/review/service-bus.api.md b/sdk/servicebus/service-bus/review/service-bus.api.md
index c5ab07485a93..dea722fbe1b7 100644
--- a/sdk/servicebus/service-bus/review/service-bus.api.md
+++ b/sdk/servicebus/service-bus/review/service-bus.api.md
@@ -103,12 +103,12 @@ export { MessagingError }
 
 // @public
 export interface NamespaceProperties {
-    createdOn: string;
+    createdOn: Date;
     messagingSku: string;
     messagingUnits: number | undefined;
     name: string;
     namespaceType: string;
-    updatedOn: string;
+    updatedOn: Date;
 }
 
 // @public
@@ -154,13 +154,13 @@ export interface QueueResponse extends QueueDescription, Response {
 
 // @public
 export interface QueueRuntimeInfo {
-    accessedOn?: string;
-    createdOn?: string;
+    accessedOn: Date;
+    createdOn: Date;
     messageCount?: number;
     messageCountDetails?: MessageCountDetails;
     name: string;
     sizeInBytes?: number;
-    updatedOn?: string;
+    updatedOn: Date;
 }
 
 // @public
@@ -433,13 +433,13 @@ export interface SubscriptionResponse extends SubscriptionDescription, Response
 
 // @public
 export interface SubscriptionRuntimeInfo {
-    accessedOn?: string;
-    createdOn: string;
+    accessedOn: Date;
+    createdOn: Date;
     messageCount: number;
     messageCountDetails?: MessageCountDetails;
     subscriptionName: string;
     topicName: string;
-    updatedOn: string;
+    updatedOn: Date;
 }
 
 // @public
@@ -480,12 +480,12 @@ export interface TopicResponse extends TopicDescription, Response {
 
 // @public
 export interface TopicRuntimeInfo {
-    accessedOn?: string;
-    createdOn?: string;
+    accessedOn: Date;
+    createdOn: Date;
     name: string;
     sizeInBytes?: number;
     subscriptionCount?: number;
-    updatedOn?: string;
+    updatedOn: Date;
 }
 
 // @public
diff --git a/sdk/servicebus/service-bus/src/serializers/namespaceResourceSerializer.ts b/sdk/servicebus/service-bus/src/serializers/namespaceResourceSerializer.ts
index 484819af0f93..add75c4bc129 100644
--- a/sdk/servicebus/service-bus/src/serializers/namespaceResourceSerializer.ts
+++ b/sdk/servicebus/service-bus/src/serializers/namespaceResourceSerializer.ts
@@ -7,7 +7,7 @@ import {
   deserializeAtomXmlResponse,
   serializeToAtomXmlRequest
 } from "../util/atomXmlHelper";
-import { getInteger, getString } from "../util/utils";
+import { getInteger, getString, getDate } from "../util/utils";
 
 /**
  * Represents the metadata related to a service bus namespace.
@@ -19,7 +19,7 @@ export interface NamespaceProperties {
   /**
    * The time at which the namespace was created.
    */
-  createdOn: string;
+  createdOn: Date;
   /**
    * The SKU/tier of the namespace.
    * "Basic", "Standard" and "Premium"
@@ -28,7 +28,7 @@ export interface NamespaceProperties {
   /**
    * The last time at which the namespace was modified.
    */
-  updatedOn: string;
+  updatedOn: Date;
   /**
    * Name of the namespace.
    */
@@ -55,9 +55,9 @@ export interface NamespaceProperties {
 export function buildNamespace(rawNamespace: any): NamespaceProperties {
   const messagingSku = getString(rawNamespace["MessagingSKU"], "messagingSku");
   return {
-    createdOn: getString(rawNamespace["CreatedTime"], "createdOn"),
+    createdOn: getDate(rawNamespace["CreatedTime"], "createdOn"),
     messagingSku: messagingSku,
-    updatedOn: getString(rawNamespace["ModifiedTime"], "updatedOn"),
+    updatedOn: getDate(rawNamespace["ModifiedTime"], "updatedOn"),
     name: getString(rawNamespace["Name"], "name"),
     namespaceType: getString(rawNamespace["NamespaceType"], "namespaceType"),
     messagingUnits:
diff --git a/sdk/servicebus/service-bus/src/serializers/queueResourceSerializer.ts b/sdk/servicebus/service-bus/src/serializers/queueResourceSerializer.ts
index b797c459e6c3..31e24d7200f0 100644
--- a/sdk/servicebus/service-bus/src/serializers/queueResourceSerializer.ts
+++ b/sdk/servicebus/service-bus/src/serializers/queueResourceSerializer.ts
@@ -19,7 +19,8 @@ import {
   getRawAuthorizationRules,
   getString,
   getStringOrUndefined,
-  MessageCountDetails
+  MessageCountDetails,
+  getDate
 } from "../util/utils";
 
 /**
@@ -118,9 +119,9 @@ export function buildQueueRuntimeInfo(rawQueue: any): QueueRuntimeInfo {
     sizeInBytes: getIntegerOrUndefined(rawQueue[Constants.SIZE_IN_BYTES]),
     messageCount: getIntegerOrUndefined(rawQueue[Constants.MESSAGE_COUNT]),
     messageCountDetails: getCountDetailsOrUndefined(rawQueue[Constants.COUNT_DETAILS]),
-    createdOn: rawQueue[Constants.CREATED_AT],
-    updatedOn: rawQueue[Constants.UPDATED_AT],
-    accessedOn: rawQueue[Constants.ACCESSED_AT]
+    createdOn: getDate(rawQueue[Constants.CREATED_AT], "createdOn"),
+    updatedOn: getDate(rawQueue[Constants.UPDATED_AT], "updatedOn"),
+    accessedOn: getDate(rawQueue[Constants.ACCESSED_AT], "accessedOn")
   };
 }
 
@@ -378,17 +379,17 @@ export interface QueueRuntimeInfo {
   /**
    * Created at timestamp
    */
-  createdOn?: string;
+  createdOn: Date;
 
   /**
    * Updated at timestamp
    */
-  updatedOn?: string;
+  updatedOn: Date;
 
   /**
    * Accessed at timestamp
    */
-  accessedOn?: string;
+  accessedOn: Date;
 
   /**
    * The entity's message count.
diff --git a/sdk/servicebus/service-bus/src/serializers/subscriptionResourceSerializer.ts b/sdk/servicebus/service-bus/src/serializers/subscriptionResourceSerializer.ts
index f45a47e00814..4c14bf7ef836 100644
--- a/sdk/servicebus/service-bus/src/serializers/subscriptionResourceSerializer.ts
+++ b/sdk/servicebus/service-bus/src/serializers/subscriptionResourceSerializer.ts
@@ -15,7 +15,8 @@ import {
   getInteger,
   getString,
   getStringOrUndefined,
-  MessageCountDetails
+  MessageCountDetails,
+  getDate
 } from "../util/utils";
 
 /**
@@ -108,9 +109,9 @@ export function buildSubscriptionRuntimeInfo(rawSubscription: any): Subscription
     topicName: getString(rawSubscription[Constants.TOPIC_NAME], "topicName"),
     messageCount: getInteger(rawSubscription[Constants.MESSAGE_COUNT], "messageCount"),
     messageCountDetails: getCountDetailsOrUndefined(rawSubscription[Constants.COUNT_DETAILS]),
-    createdOn: getString(rawSubscription[Constants.CREATED_AT], "createdOn"),
-    updatedOn: getString(rawSubscription[Constants.UPDATED_AT], "updatedOn"),
-    accessedOn: rawSubscription[Constants.ACCESSED_AT]
+    createdOn: getDate(rawSubscription[Constants.CREATED_AT], "createdOn"),
+    updatedOn: getDate(rawSubscription[Constants.UPDATED_AT], "updatedOn"),
+    accessedOn: getDate(rawSubscription[Constants.ACCESSED_AT], "accessedOn")
   };
 }
 
@@ -344,17 +345,17 @@ export interface SubscriptionRuntimeInfo {
   /**
    * Created at timestamp
    */
-  createdOn: string;
+  createdOn: Date;
 
   /**
    * Updated at timestamp
    */
-  updatedOn: string;
+  updatedOn: Date;
 
   /**
    * Accessed at timestamp
    */
-  accessedOn?: string;
+  accessedOn: Date;
 }
 
 /**
diff --git a/sdk/servicebus/service-bus/src/serializers/topicResourceSerializer.ts b/sdk/servicebus/service-bus/src/serializers/topicResourceSerializer.ts
index 7c0a77b7d43b..daaeb3513965 100644
--- a/sdk/servicebus/service-bus/src/serializers/topicResourceSerializer.ts
+++ b/sdk/servicebus/service-bus/src/serializers/topicResourceSerializer.ts
@@ -17,7 +17,8 @@ import {
   getIntegerOrUndefined,
   getRawAuthorizationRules,
   getString,
-  getStringOrUndefined
+  getStringOrUndefined,
+  getDate
 } from "../util/utils";
 
 /**
@@ -97,9 +98,9 @@ export function buildTopicRuntimeInfo(rawTopic: any): TopicRuntimeInfo {
     name: getString(rawTopic[Constants.TOPIC_NAME], "topicName"),
     sizeInBytes: getIntegerOrUndefined(rawTopic[Constants.SIZE_IN_BYTES]),
     subscriptionCount: getIntegerOrUndefined(rawTopic[Constants.SUBSCRIPTION_COUNT]),
-    createdOn: rawTopic[Constants.CREATED_AT],
-    updatedOn: rawTopic[Constants.UPDATED_AT],
-    accessedOn: rawTopic[Constants.ACCESSED_AT]
+    createdOn: getDate(rawTopic[Constants.CREATED_AT], "createdOn"),
+    updatedOn: getDate(rawTopic[Constants.UPDATED_AT], "updatedOn"),
+    accessedOn: getDate(rawTopic[Constants.ACCESSED_AT], "accessedOn")
   };
 }
 
@@ -292,17 +293,17 @@ export interface TopicRuntimeInfo {
   /**
    * Created at timestamp
    */
-  createdOn?: string;
+  createdOn: Date;
 
   /**
    * Updated at timestamp
    */
-  updatedOn?: string;
+  updatedOn: Date;
 
   /**
    * Accessed at timestamp
    */
-  accessedOn?: string;
+  accessedOn: Date;
 }
 
 /**
diff --git a/sdk/servicebus/service-bus/src/util/utils.ts b/sdk/servicebus/service-bus/src/util/utils.ts
index 3f7391c16db4..d42079f07d00 100644
--- a/sdk/servicebus/service-bus/src/util/utils.ts
+++ b/sdk/servicebus/service-bus/src/util/utils.ts
@@ -242,6 +242,16 @@ export function getIntegerOrUndefined(value: any): number | undefined {
   return result == NaN ? undefined : result;
 }
 
+/**
+ * @internal
+ * @ignore
+ * Helper utility to convert ISO-8601 time into Date type.
+ * @param value
+ */
+export function getDate(value: string, nameOfProperty: string): Date {
+  return new Date(getString(value, nameOfProperty));
+}
+
 /**
  * @internal
  * @ignore