diff --git a/src/applications/harbormaster/controller/HarbormasterController.php b/src/applications/harbormaster/controller/HarbormasterController.php
--- a/src/applications/harbormaster/controller/HarbormasterController.php
+++ b/src/applications/harbormaster/controller/HarbormasterController.php
@@ -5,10 +5,15 @@
   protected function buildApplicationCrumbs() {
     $crumbs = parent::buildApplicationCrumbs();
 
+    $can_create = $this->hasApplicationCapability(
+        HarbormasterManagePlansCapability::CAPABILITY);
+
     $crumbs->addAction(
       id(new PHUIListItemView())
         ->setName(pht('New Build Plan'))
         ->setHref($this->getApplicationURI('plan/edit/'))
+        ->setDisabled(!$can_create)
+        ->setWorkflow(!$can_create)
         ->setIcon('fa-plus-square'));
 
     return $crumbs;