diff --git a/src/main/java/net/fabricmc/loom/api/ForgeExtensionAPI.java b/src/main/java/net/fabricmc/loom/api/ForgeExtensionAPI.java
index e455d742..449aa6d4 100644
--- a/src/main/java/net/fabricmc/loom/api/ForgeExtensionAPI.java
+++ b/src/main/java/net/fabricmc/loom/api/ForgeExtensionAPI.java
@@ -138,7 +138,10 @@ public interface ForgeExtensionAPI {
 	 * Configures local mods.
 	 *
 	 * @param action the configuration action
+	 * @deprecated Replaced with {@link LoomGradleExtensionAPI#mods(Action)}
 	 */
+	@Deprecated(forRemoval = true, since = "0.12.0")
+	@ApiStatus.ScheduledForRemoval(inVersion = "1.0")
 	void localMods(Action<NamedDomainObjectContainer<ForgeLocalMod>> action);
 
 	/**
@@ -146,6 +149,9 @@ public interface ForgeExtensionAPI {
 	 *
 	 * @return the container
 	 * @see ForgeLocalMod
+	 * @deprecated Replaced with {@link LoomGradleExtensionAPI#getMods()}
 	 */
+	@Deprecated(forRemoval = true, since = "0.12.0")
+	@ApiStatus.ScheduledForRemoval(inVersion = "1.0")
 	NamedDomainObjectContainer<ForgeLocalMod> getLocalMods();
 }
diff --git a/src/main/java/net/fabricmc/loom/api/ForgeLocalMod.java b/src/main/java/net/fabricmc/loom/api/ForgeLocalMod.java
index b722eb9e..ed864678 100644
--- a/src/main/java/net/fabricmc/loom/api/ForgeLocalMod.java
+++ b/src/main/java/net/fabricmc/loom/api/ForgeLocalMod.java
@@ -32,11 +32,14 @@ import org.gradle.api.Named;
 import org.gradle.api.Project;
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.SourceSet;
+import org.jetbrains.annotations.ApiStatus;
 
 /**
  * Data for a mod built from project files in a dev environment.
  * This data is only used for run config generation (FML needs the paths to mod files).
  */
+@Deprecated(forRemoval = true, since = "0.12.0")
+@ApiStatus.ScheduledForRemoval(inVersion = "1.0")
 public class ForgeLocalMod implements Named {
 	private final Project project;
 	private final String name;
diff --git a/src/main/java/net/fabricmc/loom/extension/ForgeExtensionImpl.java b/src/main/java/net/fabricmc/loom/extension/ForgeExtensionImpl.java
index 25da6717..7b248593 100644
--- a/src/main/java/net/fabricmc/loom/extension/ForgeExtensionImpl.java
+++ b/src/main/java/net/fabricmc/loom/extension/ForgeExtensionImpl.java
@@ -126,11 +126,13 @@ public class ForgeExtensionImpl implements ForgeExtensionAPI {
 
 	@Override
 	public void localMods(Action<NamedDomainObjectContainer<ForgeLocalMod>> action) {
+		extension.getDeprecationHelper().toBeRemovedIn("loom.forge.localMods", "loom.mods", "1.0");
 		action.execute(localMods);
 	}
 
 	@Override
 	public NamedDomainObjectContainer<ForgeLocalMod> getLocalMods() {
+		extension.getDeprecationHelper().toBeRemovedIn("loom.forge.localMods", "loom.mods", "1.0");
 		return localMods;
 	}
 }