diff --git a/.changes/5fa3154d-1f42-4b98-9ad1-ef8ef1ad5fbc.json b/.changes/5fa3154d-1f42-4b98-9ad1-ef8ef1ad5fbc.json
new file mode 100644
index 00000000000..b91e3ad0670
--- /dev/null
+++ b/.changes/5fa3154d-1f42-4b98-9ad1-ef8ef1ad5fbc.json
@@ -0,0 +1,8 @@
+{
+    "id": "5fa3154d-1f42-4b98-9ad1-ef8ef1ad5fbc",
+    "type": "feature",
+    "description": "Improve the coding style of DynamoDB Mapper auto-generated schemas",
+    "issues": [
+        "https://github.com/awslabs/aws-sdk-kotlin/issues/1521"
+    ]
+}
\ No newline at end of file
diff --git a/hll/dynamodb-mapper/dynamodb-mapper-schema-codegen/src/main/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/codegen/annotations/rendering/SchemaRenderer.kt b/hll/dynamodb-mapper/dynamodb-mapper-schema-codegen/src/main/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/codegen/annotations/rendering/SchemaRenderer.kt
index 9655c3dccca..6676e004e2f 100644
--- a/hll/dynamodb-mapper/dynamodb-mapper-schema-codegen/src/main/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/codegen/annotations/rendering/SchemaRenderer.kt
+++ b/hll/dynamodb-mapper/dynamodb-mapper-schema-codegen/src/main/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/codegen/annotations/rendering/SchemaRenderer.kt
@@ -161,7 +161,7 @@ internal class SchemaRenderer(
 
             // converter
             renderValueConverter(prop.type.resolve())
-            write("")
+            write(",")
         }
     }
 
@@ -291,7 +291,7 @@ internal class SchemaRenderer(
 
         write("@#T", Types.Smithy.ExperimentalApi)
         withBlock("#Lobject #L : #T {", "}", ctx.attributes.visibility, schemaName, schemaType) {
-            write("override val converter : #1T = #1T", itemConverter)
+            write("override val converter: #1T = #1T", itemConverter)
             write("override val partitionKey: #T = #T(#S)", MapperTypes.Items.keySpec(partitionKeyProp.keySpec), partitionKeyProp.keySpecType, partitionKeyName)
             if (sortKeyProp != null) {
                 write("override val sortKey: #T = #T(#S)", MapperTypes.Items.keySpec(sortKeyProp.keySpec), sortKeyProp.keySpecType, sortKeyName!!)
diff --git a/hll/dynamodb-mapper/dynamodb-mapper-schema-generator-plugin/src/test/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/plugins/SchemaGeneratorPluginTest.kt b/hll/dynamodb-mapper/dynamodb-mapper-schema-generator-plugin/src/test/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/plugins/SchemaGeneratorPluginTest.kt
index efdf2aa35d6..8b93c38c40a 100644
--- a/hll/dynamodb-mapper/dynamodb-mapper-schema-generator-plugin/src/test/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/plugins/SchemaGeneratorPluginTest.kt
+++ b/hll/dynamodb-mapper/dynamodb-mapper-schema-generator-plugin/src/test/kotlin/aws/sdk/kotlin/hll/dynamodbmapper/plugins/SchemaGeneratorPluginTest.kt
@@ -106,25 +106,25 @@ class SchemaGeneratorPluginTest {
                     "id",
                     User::id,
                     UserBuilder::id::set,
-                    IntConverter
+                    IntConverter,
                 ),
                 AttributeDescriptor(
                     "fName",
                     User::givenName,
                     UserBuilder::givenName::set,
-                    StringConverter
+                    StringConverter,
                 ),
                 AttributeDescriptor(
                     "lName",
                     User::surname,
                     UserBuilder::surname::set,
-                    StringConverter
+                    StringConverter,
                 ),
                 AttributeDescriptor(
                     "age",
                     User::age,
                     UserBuilder::age::set,
-                    IntConverter
+                    IntConverter,
                 ),
             ),
         )
@@ -136,7 +136,7 @@ class SchemaGeneratorPluginTest {
             schemaContents,
             """
         object UserSchema : ItemSchema.PartitionKey<User, Int> {
-            override val converter : UserConverter = UserConverter
+            override val converter: UserConverter = UserConverter
             override val partitionKey: KeySpec<Number> = aws.sdk.kotlin.hll.dynamodbmapper.items.KeySpec.Number("id")
         }
             """.trimIndent(),
@@ -173,25 +173,25 @@ class SchemaGeneratorPluginTest {
                     "id",
                     BuilderNotRequired::id,
                     BuilderNotRequired::id::set,
-                    IntConverter
+                    IntConverter,
                 ),
                 AttributeDescriptor(
                     "fName",
                     BuilderNotRequired::givenName,
                     BuilderNotRequired::givenName::set,
-                    StringConverter
+                    StringConverter,
                 ),
                 AttributeDescriptor(
                     "lName",
                     BuilderNotRequired::surname,
                     BuilderNotRequired::surname::set,
-                    StringConverter
+                    StringConverter,
                 ),
                 AttributeDescriptor(
                     "age",
                     BuilderNotRequired::age,
                     BuilderNotRequired::age::set,
-                    IntConverter
+                    IntConverter,
                 ),
             ),
         )
@@ -414,7 +414,7 @@ class SchemaGeneratorPluginTest {
             schemaContents,
             """
             public object CustomUserSchema : ItemSchema.PartitionKey<CustomUser, Int> {
-                override val converter : MyCustomUserConverter = MyCustomUserConverter
+                override val converter: MyCustomUserConverter = MyCustomUserConverter
                 override val partitionKey: KeySpec<Number> = aws.sdk.kotlin.hll.dynamodbmapper.items.KeySpec.Number("id")
             }
             """.trimIndent(),
@@ -570,7 +570,7 @@ class SchemaGeneratorPluginTest {
             schemaContents,
             """
         object RenamedPartitionKeySchema : ItemSchema.PartitionKey<RenamedPartitionKey, Int> {
-            override val converter : RenamedPartitionKeyConverter = RenamedPartitionKeyConverter
+            override val converter: RenamedPartitionKeyConverter = RenamedPartitionKeyConverter
             override val partitionKey: KeySpec<Number> = aws.sdk.kotlin.hll.dynamodbmapper.items.KeySpec.Number("user_id")
         }
             """.trimIndent(),