diff --git a/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java b/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
index af022a8..e23460f 100644
--- a/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
+++ b/src/main/java/net/fabricmc/loom/task/AbstractRemapJarTask.java
@@ -58,6 +58,12 @@ public abstract class AbstractRemapJarTask extends Jar {
 	@Input
 	public abstract Property<String> getTargetNamespace();
 
+	/**
+	 * When enabled the TinyRemapperService will not be shared across sub projects.
+	 */
+	@Input
+	public abstract Property<Boolean> getRemapperIsolation();
+
 	@Inject
 	protected abstract WorkerExecutor getWorkerExecutor();
 
@@ -65,6 +71,7 @@ public abstract class AbstractRemapJarTask extends Jar {
 	public AbstractRemapJarTask() {
 		getSourceNamespace().convention(MappingsNamespace.NAMED.toString()).finalizeValueOnRead();
 		getTargetNamespace().convention(MappingsNamespace.INTERMEDIARY.toString()).finalizeValueOnRead();
+		getRemapperIsolation().convention(false).finalizeValueOnRead();
 	}
 
 	public final <P extends AbstractRemapParams> void submitWork(Class<? extends AbstractRemapAction<P>> workAction, Action<P> action) {
diff --git a/src/main/java/net/fabricmc/loom/task/service/TinyRemapperService.java b/src/main/java/net/fabricmc/loom/task/service/TinyRemapperService.java
index 9e05d65..54d974a 100644
--- a/src/main/java/net/fabricmc/loom/task/service/TinyRemapperService.java
+++ b/src/main/java/net/fabricmc/loom/task/service/TinyRemapperService.java
@@ -33,6 +33,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.StringJoiner;
 
 import org.gradle.api.Project;
 
@@ -56,7 +57,19 @@ public class TinyRemapperService implements SharedService {
 		final boolean useKotlinExtension = project.getPluginManager().hasPlugin("org.jetbrains.kotlin.jvm");
 
 		// Generates an id that is used to share the remapper across projects. This tasks in the remap jar task name to handle custom remap jar tasks separately.
-		final String id = extension.getMappingsProvider().getBuildServiceName("remapJarService", from, to) + ":" + remapJarTask.getName() + (useKotlinExtension ? ":kotlin" : "");
+		final var joiner = new StringJoiner(":");
+		joiner.add(extension.getMappingsProvider().getBuildServiceName("remapJarService", from, to));
+		joiner.add(remapJarTask.getName());
+
+		if (useKotlinExtension) {
+			joiner.add("kotlin");
+		}
+
+		if (remapJarTask.getRemapperIsolation().get()) {
+			joiner.add(project.getPath());
+		}
+
+		final String id = joiner.toString();
 
 		TinyRemapperService service = sharedServiceManager.getOrCreateService(id, () -> {
 			List<IMappingProvider> mappings = new ArrayList<>();