diff --git a/src/Plugin/search_api/processor/Property/TypedRelationFilteredProperty.php b/src/Plugin/search_api/processor/Property/TypedRelationFilteredProperty.php
new file mode 100644
index 0000000..0d5938f
--- /dev/null
+++ b/src/Plugin/search_api/processor/Property/TypedRelationFilteredProperty.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Drupal\controlled_access_terms\Plugin\search_api\processor\Property;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\search_api\Item\FieldInterface;
+use Drupal\search_api\Processor\ConfigurablePropertyBase;
+
+/**
+ * Defines a "Typed relation by type" property.
+ *
+ * @see \Drupal\controlled_access_terms\Plugin\search_api\processor\TypedRelationFiltered
+ */
+class TypedRelationFilteredProperty extends ConfigurablePropertyBase {
+
+  use StringTranslationTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return [
+      'rel_types' => [],
+      'bundle' => '',
+      'base_field' => '',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(FieldInterface $field, array $form, FormStateInterface $form_state) {
+    $configuration = $field->getConfiguration();
+    $form['rel_types'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Relations to include'),
+      '#options' => $field->getDataDefinition()->getSetting('options'),
+      '#multiple' => TRUE,
+      '#default_value' => $configuration['rel_types'],
+      '#required' => TRUE,
+      '#size' => 16,
+    ];
+    $form['bundle'] = [
+      '#type' => 'hidden',
+      '#value' => $field->getDataDefinition()->getSetting('bundle'),
+    ];
+    $form['base_field'] = [
+      '#type' => 'hidden',
+      '#value' => $field->getDataDefinition()->getSetting('base_field'),
+    ];
+    return $form;
+  }
+
+}
diff --git a/src/Plugin/search_api/processor/TypedRelationFiltered.php b/src/Plugin/search_api/processor/TypedRelationFiltered.php
new file mode 100644
index 0000000..b28dbc1
--- /dev/null
+++ b/src/Plugin/search_api/processor/TypedRelationFiltered.php
@@ -0,0 +1,169 @@
+<?php
+
+namespace Drupal\controlled_access_terms\Plugin\search_api\processor;
+
+use Drupal\controlled_access_terms\Plugin\search_api\processor\Property\TypedRelationFilteredProperty;
+use Drupal\Core\Entity\EntityTypeManager;
+use Drupal\search_api\Datasource\DatasourceInterface;
+use Drupal\search_api\Item\ItemInterface;
+use Drupal\search_api\Processor\ProcessorPluginBase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Adds filterable fields for each Typed Relation field.
+ *
+ * @SearchApiProcessor(
+ *   id = "typed_relation_filtered",
+ *   label = @Translation("Typed Relation, filtered by type"),
+ *   description = @Translation("Filter Typed Relation fields by type"),
+ *   stages = {
+ *     "add_properties" = 0,
+ *   },
+ *   locked = false,
+ *   hidden = false,
+ * )
+ */
+class TypedRelationFiltered extends ProcessorPluginBase {
+
+  /**
+   * Entity Type Manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManager
+   */
+  protected EntityTypeManager $entityTypeManager;
+
+  /**
+   * Constructor.
+   *
+   * @param array $configuration
+   *   The plugin configuration, i.e. an array with configuration values keyed
+   *   by configuration option name. The special key 'context' may be used to
+   *   initialize the defined contexts by setting it to an array of context
+   *   values keyed by context names.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Entity\EntityTypeManager $entityTypeManager
+   *   The Entity Type Manager.
+   */
+  public function __construct(
+    array $configuration,
+          $plugin_id,
+          $plugin_definition,
+    EntityTypeManager $entityTypeManager
+  ) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->entityTypeManager = $entityTypeManager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('entity_type.manager'),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getPropertyDefinitions(DatasourceInterface $datasource = NULL): array {
+    $properties = [];
+
+    if (!$datasource || !$datasource->getEntityTypeId()) {
+      return $properties;
+    }
+
+    $entity_type = $datasource->getEntityTypeId();
+
+    // Get all configured typed relation fields.
+    $fields = $this->entityTypeManager->getStorage('field_config')->loadByProperties([
+      'entity_type' => $entity_type,
+      'field_type' => 'typed_relation',
+    ]);
+
+    foreach ($fields as $field) {
+      // Create a "filtered" option.
+      $definition = [
+        'label' => $this->t('@label (filtered by type) [@bundle]', [
+          '@label' => $field->label(),
+          '@bundle' => $field->getTargetBundle(),
+        ]),
+        'description' => $this->t('Typed relation field, filtered by type'),
+        'type' => 'string',
+        'processor_id' => $this->getPluginId(),
+        'is_list' => TRUE,
+        'settings' => [
+          'options' => $field->getSetting('rel_types'),
+          'bundle' => $field->getTargetBundle(),
+          'base_field' => $field->getName(),
+        ],
+      ];
+      $fieldname = 'typed_relation_filter__' . str_replace('.', '__', $field->id());
+      $property = new TypedRelationFilteredProperty($definition);
+      $property->setSetting('options', $field->getSetting('rel_types'));
+      $properties[$fieldname] = $property;
+    }
+    return $properties;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addFieldValues(ItemInterface $item) {
+    // Skip if no Typed Relation Filtered search_api_fields are configured.
+    $relevant_search_api_fields = [];
+    $search_api_fields = $item->getFields(FALSE);
+    foreach ($search_api_fields as $search_api_field) {
+      if (substr($search_api_field->getPropertyPath(), 0, 23) == 'typed_relation_filter__') {
+        $relevant_search_api_fields[] = $search_api_field;
+      }
+    }
+    if (empty($search_api_fields)) {
+      return;
+    }
+    // Cycle over any typed relation fields on the original item.
+    $content_entity = $item->getOriginalObject()->getValue();
+
+    foreach ($relevant_search_api_fields as $search_api_field) {
+      $field_config = $search_api_field->getConfiguration();
+
+      // Exit if we're on the wrong bundle or the field isn't set.
+      if (($content_entity->bundle() != $field_config['bundle'])
+        || !$content_entity->hasField($field_config['base_field'])) {
+        return;
+      }
+
+      $vals = $content_entity->get($field_config['base_field'])->getValue();
+      foreach ($vals as $element) {
+        $rel_type = $element['rel_type'];
+        if (in_array($rel_type, $field_config['rel_types'])) {
+          $tid = $element['target_id'];
+          $taxo_term = $this->entityTypeManager
+            ->getStorage('taxonomy_term')
+            ->load($tid);
+          if ($taxo_term) {
+            $taxo_name = $taxo_term->name->value;
+            $search_api_field->addValue($taxo_name);
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function requiresReindexing(array $old_settings = NULL, array $new_settings = NULL) {
+    if ($new_settings != $old_settings) {
+      return TRUE;
+    }
+    return FALSE;
+  }
+
+}