diff --git a/first-party/ownership-extension/maven/build.gradle b/first-party/ownership-extension/maven/build.gradle
index 7517d41..9ce5652 100644
--- a/first-party/ownership-extension/maven/build.gradle
+++ b/first-party/ownership-extension/maven/build.gradle
@@ -6,6 +6,7 @@ plugins {
 
 dependencies {
   compileOnly "com.google.cloud.tools:jib-maven-plugin-extension-api:${dependencyVersions.GRADLE_EXTENSION}"
+  compileOnly "com.google.guava:guava:${dependencyVersions.GUAVA}"
 
   testImplementation "com.google.cloud.tools:jib-maven-plugin-extension-api:${dependencyVersions.GRADLE_EXTENSION}"
   testImplementation "junit:junit:${dependencyVersions.JUNIT}"
@@ -44,9 +45,9 @@ publishing {
 
 // Release plugin (git release commits and version updates)
 release {
-  tagTemplate = 'v$version-maven-ownership'
+  tagTemplate = 'v$version-ownership-maven'
   git {
-    requireBranch = /^maven_ownership_release_v\d+.*$/  //regex
+    requireBranch = /^ownership_maven_release_v\d+.*$/  //regex
   }
 }
 /* RELEASE */
diff --git a/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/Configuration.java b/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/Configuration.java
new file mode 100644
index 0000000..2e0653e
--- /dev/null
+++ b/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/Configuration.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2020 Google LLC.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.cloud.tools.jib.plugins.extension.maven.ownership;
+
+import com.google.common.annotations.VisibleForTesting;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Extension-specific Maven configuration.
+ *
+ * <p>Example usage in {@code pom.xml}:
+ *
+ * <pre>{@code
+ * <configuration implementation="com.google.cloud.tools.jib.plugins.extension.maven.ownership.Configuration">
+ *   <rules>
+ *     <!-- sets UID 300 for all files under /app/classes/ -->
+ *     <rule>
+ *       <glob>/app/classes/**</glob>
+ *       <ownership>300</ownership>
+ *     </rule>
+ *     <!-- sets UID 300 and GID 500 for all files under /static/ -->
+ *     <rule>
+ *       <glob>/static/**</glob>
+ *       <ownership>300:500</ownership>
+ *     </rule>
+ *   </rules>
+ * </configuration>
+ * }</pre>
+ */
+public class Configuration {
+
+  public static class Rule {
+    @VisibleForTesting String glob = "";
+    @VisibleForTesting String ownership = "";
+
+    String getGlob() {
+      return glob;
+    }
+
+    String getOwnership() {
+      return ownership;
+    }
+  }
+
+  @VisibleForTesting List<Rule> rules = new ArrayList<>();
+
+  List<Rule> getRules() {
+    return rules;
+  }
+}
diff --git a/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtension.java b/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtension.java
new file mode 100644
index 0000000..71beb53
--- /dev/null
+++ b/first-party/ownership-extension/maven/src/main/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtension.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2020 Google LLC.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.cloud.tools.jib.plugins.extension.maven.ownership;
+
+import com.google.cloud.tools.jib.api.buildplan.ContainerBuildPlan;
+import com.google.cloud.tools.jib.api.buildplan.FileEntriesLayer;
+import com.google.cloud.tools.jib.api.buildplan.FileEntry;
+import com.google.cloud.tools.jib.maven.extension.JibMavenPluginExtension;
+import com.google.cloud.tools.jib.maven.extension.MavenData;
+import com.google.cloud.tools.jib.plugins.extension.ExtensionLogger;
+import com.google.cloud.tools.jib.plugins.extension.ExtensionLogger.LogLevel;
+import com.google.cloud.tools.jib.plugins.extension.JibPluginExtensionException;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.PathMatcher;
+import java.nio.file.Paths;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+public class JibOwnershipExtension implements JibMavenPluginExtension<Configuration> {
+
+  private Map<PathMatcher, String> pathMatchers = new LinkedHashMap<>();
+
+  @Override
+  public Optional<Class<Configuration>> getExtraConfigType() {
+    return Optional.of(Configuration.class);
+  }
+
+  @Override
+  public ContainerBuildPlan extendContainerBuildPlan(
+      ContainerBuildPlan buildPlan,
+      Map<String, String> properties,
+      Optional<Configuration> config,
+      MavenData mavenData,
+      ExtensionLogger logger)
+      throws JibPluginExtensionException {
+    logger.log(LogLevel.LIFECYCLE, "Running Jib Ownership Extension");
+    if (!config.isPresent()) {
+      logger.log(LogLevel.WARN, "Nothing configured for Jib Ownership Extension");
+      return buildPlan;
+    }
+
+    for (Configuration.Rule rule : config.get().getRules()) {
+      if (rule.getGlob().isEmpty()) {
+        throw new JibPluginExtensionException(
+            getClass(), "glob pattern not given in ownership configuration");
+      }
+      pathMatchers.put(
+          FileSystems.getDefault().getPathMatcher("glob:" + rule.getGlob()), rule.getOwnership());
+    }
+
+    @SuppressWarnings("unchecked")
+    List<FileEntriesLayer> layers = (List<FileEntriesLayer>) buildPlan.getLayers();
+    List<FileEntriesLayer> newLayers =
+        layers.stream().map(this::applyRulesToLayer).collect(Collectors.toList());
+    return buildPlan.toBuilder().setLayers(newLayers).build();
+  }
+
+  private FileEntriesLayer applyRulesToLayer(FileEntriesLayer layer) {
+    List<FileEntry> entries =
+        layer.getEntries().stream().map(this::applyRulesToFileEntry).collect(Collectors.toList());
+    return layer.toBuilder().setEntries(entries).build();
+  }
+
+  private FileEntry applyRulesToFileEntry(FileEntry entry) {
+    String newOwnership = null;
+
+    for (Entry<PathMatcher, String> mapEntry : pathMatchers.entrySet()) {
+      PathMatcher matcher = mapEntry.getKey();
+      Path pathInContainer = Paths.get(entry.getExtractionPath().toString());
+      if (matcher.matches(pathInContainer)) {
+        newOwnership = mapEntry.getValue();
+      }
+    }
+    return newOwnership == null
+        ? entry
+        : new FileEntry(
+            entry.getSourceFile(),
+            entry.getExtractionPath(),
+            entry.getPermissions(),
+            entry.getModificationTime(),
+            newOwnership);
+  }
+}
diff --git a/first-party/ownership-extension/maven/src/main/resources/META-INF/services/com.google.cloud.tools.jib.maven.extension.JibMavenPluginExtension b/first-party/ownership-extension/maven/src/main/resources/META-INF/services/com.google.cloud.tools.jib.maven.extension.JibMavenPluginExtension
new file mode 100644
index 0000000..b988283
--- /dev/null
+++ b/first-party/ownership-extension/maven/src/main/resources/META-INF/services/com.google.cloud.tools.jib.maven.extension.JibMavenPluginExtension
@@ -0,0 +1 @@
+com.google.cloud.tools.jib.plugins.extension.maven.ownership.JibOwnershipExtension
\ No newline at end of file
diff --git a/first-party/ownership-extension/maven/src/test/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtensionTest.java b/first-party/ownership-extension/maven/src/test/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtensionTest.java
new file mode 100644
index 0000000..23d90dc
--- /dev/null
+++ b/first-party/ownership-extension/maven/src/test/java/com/google/cloud/tools/jib/plugins/extension/maven/ownership/JibOwnershipExtensionTest.java
@@ -0,0 +1,174 @@
+/*
+ * Copyright 2020 Google LLC.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.cloud.tools.jib.plugins.extension.maven.ownership;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.verify;
+
+import com.google.cloud.tools.jib.api.buildplan.AbsoluteUnixPath;
+import com.google.cloud.tools.jib.api.buildplan.ContainerBuildPlan;
+import com.google.cloud.tools.jib.api.buildplan.FileEntriesLayer;
+import com.google.cloud.tools.jib.api.buildplan.FileEntry;
+import com.google.cloud.tools.jib.maven.extension.MavenData;
+import com.google.cloud.tools.jib.plugins.extension.ExtensionLogger;
+import com.google.cloud.tools.jib.plugins.extension.ExtensionLogger.LogLevel;
+import com.google.cloud.tools.jib.plugins.extension.JibPluginExtensionException;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+@RunWith(MockitoJUnitRunner.class)
+public class JibOwnershipExtensionTest {
+
+  @Mock private MavenData mavenData;
+  @Mock private ExtensionLogger logger;
+
+  private Map<String, String> properties;
+
+  private static <T> List<T> mapLayerEntries(
+      FileEntriesLayer layer, Function<FileEntry, T> mapper) {
+    return layer.getEntries().stream().map(mapper).collect(Collectors.toList());
+  }
+
+  @Test
+  public void testExtendContainerBuildPlan_noConfiguration() throws JibPluginExtensionException {
+    ContainerBuildPlan buildPlan = ContainerBuildPlan.builder().build();
+    ContainerBuildPlan newPlan =
+        new JibOwnershipExtension()
+            .extendContainerBuildPlan(buildPlan, properties, Optional.empty(), mavenData, logger);
+    assertSame(buildPlan, newPlan);
+    verify(logger).log(LogLevel.WARN, "Nothing configured for Jib Ownership Extension");
+  }
+
+  @Test
+  public void testExtendContainerBuildPlan_noGlobGiven() {
+    ContainerBuildPlan buildPlan = ContainerBuildPlan.builder().build();
+    Configuration config = new Configuration();
+    config.rules = Arrays.asList(new Configuration.Rule());
+    try {
+      new JibOwnershipExtension()
+          .extendContainerBuildPlan(buildPlan, properties, Optional.of(config), mavenData, logger);
+      fail();
+    } catch (JibPluginExtensionException ex) {
+      assertEquals(JibOwnershipExtension.class, ex.getExtensionClass());
+      assertEquals("glob pattern not given in ownership configuration", ex.getMessage());
+    }
+  }
+
+  @Test
+  public void testExtendContainerBuildPlan() throws JibPluginExtensionException {
+    FileEntriesLayer layer1 =
+        FileEntriesLayer.builder()
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/file"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/another"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/sub/dir/file"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/sub/dir/another"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/untouched/file"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/untouched/another"))
+            .build();
+    FileEntriesLayer layer2 =
+        FileEntriesLayer.builder()
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/foo"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/bar"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/sub/dir/foo"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/sub/dir/bar"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/untouched/foo"))
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/untouched/bar"))
+            .build();
+    ContainerBuildPlan buildPlan =
+        ContainerBuildPlan.builder().addLayer(layer1).addLayer(layer2).build();
+
+    Configuration.Rule rule1 = new Configuration.Rule();
+    rule1.glob = "/target/**";
+    rule1.ownership = "10:20";
+    Configuration.Rule rule2 = new Configuration.Rule();
+    rule2.glob = "**/bar";
+    rule2.ownership = "999:777";
+    Configuration config = new Configuration();
+    config.rules = Arrays.asList(rule1, rule2);
+
+    ContainerBuildPlan newPlan =
+        new JibOwnershipExtension()
+            .extendContainerBuildPlan(
+                buildPlan, properties, Optional.of(config), mavenData, logger);
+
+    FileEntriesLayer newLayer1 = (FileEntriesLayer) newPlan.getLayers().get(0);
+    FileEntriesLayer newLayer2 = (FileEntriesLayer) newPlan.getLayers().get(1);
+
+    assertEquals(
+        Arrays.asList(
+            AbsoluteUnixPath.get("/target/file"),
+            AbsoluteUnixPath.get("/target/another"),
+            AbsoluteUnixPath.get("/target/sub/dir/file"),
+            AbsoluteUnixPath.get("/target/sub/dir/another"),
+            AbsoluteUnixPath.get("/untouched/file"),
+            AbsoluteUnixPath.get("/untouched/another")),
+        mapLayerEntries(newLayer1, FileEntry::getExtractionPath));
+    assertEquals(
+        Arrays.asList("10:20", "10:20", "10:20", "10:20", "", ""),
+        mapLayerEntries(newLayer1, FileEntry::getOwnership));
+
+    assertEquals(
+        Arrays.asList(
+            AbsoluteUnixPath.get("/target/foo"),
+            AbsoluteUnixPath.get("/target/bar"),
+            AbsoluteUnixPath.get("/target/sub/dir/foo"),
+            AbsoluteUnixPath.get("/target/sub/dir/bar"),
+            AbsoluteUnixPath.get("/untouched/foo"),
+            AbsoluteUnixPath.get("/untouched/bar")),
+        mapLayerEntries(newLayer2, FileEntry::getExtractionPath));
+    assertEquals(
+        Arrays.asList("10:20", "999:777", "10:20", "999:777", "", "999:777"),
+        mapLayerEntries(newLayer2, FileEntry::getOwnership));
+  }
+
+  @Test
+  public void testExtendContainerBuildPlan_lastConfigWins() throws JibPluginExtensionException {
+    FileEntriesLayer layer =
+        FileEntriesLayer.builder()
+            .addEntry(Paths.get("whatever"), AbsoluteUnixPath.get("/target/file"))
+            .build();
+    ContainerBuildPlan buildPlan = ContainerBuildPlan.builder().addLayer(layer).build();
+
+    Configuration.Rule rule1 = new Configuration.Rule();
+    rule1.glob = "**";
+    rule1.ownership = "10:20";
+    Configuration.Rule rule2 = new Configuration.Rule();
+    rule2.glob = "**";
+    rule2.ownership = "999:777";
+    Configuration config = new Configuration();
+    config.rules = Arrays.asList(rule1, rule2);
+
+    ContainerBuildPlan newPlan =
+        new JibOwnershipExtension()
+            .extendContainerBuildPlan(
+                buildPlan, properties, Optional.of(config), mavenData, logger);
+
+    FileEntriesLayer newLayer = (FileEntriesLayer) newPlan.getLayers().get(0);
+    assertEquals(Arrays.asList("999:777"), mapLayerEntries(newLayer, FileEntry::getOwnership));
+  }
+}