diff --git a/readthedocs/proxito/tests/test_hosting.py b/readthedocs/proxito/tests/test_hosting.py
index fdc19e0eefd..bcda4a0383f 100644
--- a/readthedocs/proxito/tests/test_hosting.py
+++ b/readthedocs/proxito/tests/test_hosting.py
@@ -736,7 +736,7 @@ def test_number_of_queries_project_version_slug(self):
                 active=True,
             )
 
-        with self.assertNumQueries(22):
+        with self.assertNumQueries(24):
             r = self.client.get(
                 reverse("proxito_readthedocs_docs_addons"),
                 {
@@ -765,7 +765,7 @@ def test_number_of_queries_url(self):
                 active=True,
             )
 
-        with self.assertNumQueries(24):
+        with self.assertNumQueries(26):
             r = self.client.get(
                 reverse("proxito_readthedocs_docs_addons"),
                 {
@@ -801,7 +801,7 @@ def test_number_of_queries_url_subproject(self):
                 active=True,
             )
 
-        with self.assertNumQueries(31):
+        with self.assertNumQueries(35):
             r = self.client.get(
                 reverse("proxito_readthedocs_docs_addons"),
                 {
@@ -827,7 +827,7 @@ def test_number_of_queries_url_translations(self):
                 language=language,
             )
 
-        with self.assertNumQueries(60):
+        with self.assertNumQueries(62):
             r = self.client.get(
                 reverse("proxito_readthedocs_docs_addons"),
                 {
diff --git a/readthedocs/proxito/views/hosting.py b/readthedocs/proxito/views/hosting.py
index b74f9c4ab71..564ee05f928 100644
--- a/readthedocs/proxito/views/hosting.py
+++ b/readthedocs/proxito/views/hosting.py
@@ -493,9 +493,7 @@ def _v1(self, project, version, build, filename, url, request):
                         #     "Include subprojects",
                         #     f"subprojects:{project.slug}/{version.slug}",
                         # ],
-                    ]
-                    if version
-                    else [],
+                    ],
                     "default_filter": f"project:{project.slug}/{version.slug}"
                     if version
                     else None,
@@ -514,6 +512,28 @@ def _v1(self, project, version, build, filename, url, request):
             },
         }
 
+        # Show the subprojects filter on the parent project and subproject
+        if version:
+            # TODO: Remove these queries and try to find a way to get this data
+            # from the resolver, which has already done these queries.
+            # TODO: Replace this fixed filters with the work proposed in
+            # https://github.com/readthedocs/addons/issues/22
+            if project.subprojects.exists():
+                data["addons"]["search"]["filters"].append(
+                    [
+                        "Include subprojects",
+                        f"subprojects:{project.slug}/{version.slug}",
+                    ]
+                )
+            if project.superprojects.exists():
+                superproject = project.superprojects.first().parent
+                data["addons"]["search"]["filters"].append(
+                    [
+                        "Include subprojects",
+                        f"subprojects:{superproject.slug}/{version.slug}",
+                    ]
+                )
+
         # DocDiff depends on `url=` GET attribute.
         # This attribute allows us to know the exact filename where the request was made.
         # If we don't know the filename, we cannot return the data required by DocDiff to work.