diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ConfigurationMetadata.java b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ConfigurationMetadata.java
index f703f9e5b2..4d65e633fb 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ConfigurationMetadata.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ConfigurationMetadata.java
@@ -124,6 +124,9 @@ public class ConfigurationMetadata {
 					if (deprecation.getReplacement() != null) {
 						matchingDeprecation.setReplacement(deprecation.getReplacement());
 					}
+					if (deprecation.getLevel() != null) {
+						matchingDeprecation.setLevel(deprecation.getLevel());
+					}
 				}
 			}
 		}
diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ItemDeprecation.java b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ItemDeprecation.java
index 5762cd3bf2..99038aef90 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ItemDeprecation.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/ItemDeprecation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,12 +28,20 @@ public class ItemDeprecation {
 
 	private String replacement;
 
+	private String level;
+
 	public ItemDeprecation() {
+		this(null, null);
 	}
 
 	public ItemDeprecation(String reason, String replacement) {
+		this(reason, replacement, null);
+	}
+
+	public ItemDeprecation(String reason, String replacement, String level) {
 		this.reason = reason;
 		this.replacement = replacement;
+		this.level = level;
 	}
 
 	public String getReason() {
@@ -52,10 +60,19 @@ public class ItemDeprecation {
 		this.replacement = replacement;
 	}
 
+	public String getLevel() {
+		return this.level;
+	}
+
+	public void setLevel(String level) {
+		this.level = level;
+	}
+
 	@Override
 	public String toString() {
 		return "ItemDeprecation{" + "reason='" + this.reason + '\'' + ", "
-				+ "replacement='" + this.replacement + '\'' + '}';
+				+ "replacement='" + this.replacement + '\'' + ", "
+				+ "level='" + this.level + '\'' + '}';
 	}
 
 	@Override
@@ -68,13 +85,15 @@ public class ItemDeprecation {
 		}
 		ItemDeprecation other = (ItemDeprecation) o;
 		return nullSafeEquals(this.reason, other.reason)
-				&& nullSafeEquals(this.replacement, other.replacement);
+				&& nullSafeEquals(this.replacement, other.replacement)
+				&& nullSafeEquals(this.level, other.level);
 	}
 
 	@Override
 	public int hashCode() {
 		int result = nullSafeHashCode(this.reason);
 		result = 31 * result + nullSafeHashCode(this.replacement);
+		result = 31 * result + nullSafeHashCode(this.level);
 		return result;
 	}
 
diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonConverter.java b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonConverter.java
index 130bad2a75..fcfeee74ac 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonConverter.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonConverter.java
@@ -67,6 +67,9 @@ class JsonConverter {
 		if (deprecation != null) {
 			jsonObject.put("deprecated", true); // backward compatibility
 			JSONObject deprecationJsonObject = new JSONObject();
+			if (deprecation.getLevel() != null) {
+				deprecationJsonObject.put("level", deprecation.getLevel());
+			}
 			if (deprecation.getReason() != null) {
 				deprecationJsonObject.put("reason", deprecation.getReason());
 			}
diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonMarshaller.java b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonMarshaller.java
index 0c6d65b2b8..9cc77ee9cd 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonMarshaller.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/metadata/JsonMarshaller.java
@@ -108,6 +108,7 @@ public class JsonMarshaller {
 		if (object.has("deprecation")) {
 			JSONObject deprecationJsonObject = object.getJSONObject("deprecation");
 			ItemDeprecation deprecation = new ItemDeprecation();
+			deprecation.setLevel(deprecationJsonObject.optString("level", null));
 			deprecation.setReason(deprecationJsonObject.optString("reason", null));
 			deprecation
 					.setReplacement(deprecationJsonObject.optString("replacement", null));
diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java b/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java
index 7c36f3995d..119eb80ec4 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java
@@ -542,13 +542,15 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 	public void mergeExistingPropertyDeprecation() throws Exception {
 		ItemMetadata property = ItemMetadata.newProperty("simple", "comparator", null,
 				null, null, null, null,
-				new ItemDeprecation("Don't use this.", "simple.complex-comparator"));
+				new ItemDeprecation("Don't use this.", "simple.complex-comparator",
+						"error"));
 		writeAdditionalMetadata(property);
 		ConfigurationMetadata metadata = compile(SimpleProperties.class);
 		assertThat(metadata)
 				.has(Metadata.withProperty("simple.comparator", "java.util.Comparator<?>")
 						.fromSource(SimpleProperties.class)
-						.withDeprecation("Don't use this.", "simple.complex-comparator"));
+						.withDeprecation("Don't use this.", "simple.complex-comparator",
+								"error"));
 		assertThat(metadata.getItems()).hasSize(4);
 	}
 
@@ -566,6 +568,19 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 		assertThat(metadata.getItems()).hasSize(3);
 	}
 
+	@Test
+	public void mergeExistingPropertyDeprecationOverrideLevel() throws Exception {
+		ItemMetadata property = ItemMetadata.newProperty("singledeprecated", "name", null,
+				null, null, null, null, new ItemDeprecation(null, null, "error"));
+		writeAdditionalMetadata(property);
+		ConfigurationMetadata metadata = compile(DeprecatedSingleProperty.class);
+		assertThat(metadata).has(
+				Metadata.withProperty("singledeprecated.name", String.class.getName())
+						.fromSource(DeprecatedSingleProperty.class)
+						.withDeprecation("renamed", "singledeprecated.new-name", "error"));
+		assertThat(metadata.getItems()).hasSize(3);
+	}
+
 	@Test
 	public void mergeOfInvalidAdditionalMetadata() throws IOException {
 		File additionalMetadataFile = createAdditionalMetadataFile();
diff --git a/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java b/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java
index 5d40fc9cef..81f1082b72 100644
--- a/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java
+++ b/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/Metadata.java
@@ -202,9 +202,14 @@ public final class Metadata {
 		}
 
 		public MetadataItemCondition withDeprecation(String reason, String replacement) {
+			return withDeprecation(reason, replacement, null);
+		}
+
+		public MetadataItemCondition withDeprecation(String reason, String replacement,
+				String level) {
 			return new MetadataItemCondition(this.itemType, this.name, this.type,
 					this.sourceType, this.sourceMethod, this.description,
-					this.defaultValue, new ItemDeprecation(reason, replacement));
+					this.defaultValue, new ItemDeprecation(reason, replacement, level));
 		}
 
 		public MetadataItemCondition withNoDeprecation() {