diff --git a/src/PHPCensor/Command/InstallCommand.php b/src/PHPCensor/Command/InstallCommand.php
index a98a10f0..d4e82fc6 100644
--- a/src/PHPCensor/Command/InstallCommand.php
+++ b/src/PHPCensor/Command/InstallCommand.php
@@ -9,6 +9,7 @@ use b8\Config;
 use b8\Store\Factory;
 use PHPCensor\Model\ProjectGroup;
 use PHPCensor\Store\UserStore;
+use PHPCensor\Store\ProjectGroupStore;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\QuestionHelper;
 use Symfony\Component\Console\Input\InputInterface;
@@ -474,7 +475,12 @@ class InstallCommand extends Command
     {
         try {
             /** @var UserStore $userStore */
-            $userStore   = Factory::getStore('User');
+            $userStore = Factory::getStore('User');
+            $adminUser = $userStore->getByEmail($admin['email']);
+            if ($adminUser) {
+                throw new \RuntimeException('Admin account already exists!');
+            }
+
             $userService = new UserService($userStore);
             $userService->createUser($admin['name'], $admin['email'], 'internal', json_encode(['type' => 'internal']), $admin['password'], true);
 
@@ -491,6 +497,13 @@ class InstallCommand extends Command
     protected function createDefaultGroup($output)
     {
         try {
+            /** @var ProjectGroupStore $projectGroupStore */
+            $projectGroupStore = Factory::getStore('ProjectGroup');
+            $projectGroup      = $projectGroupStore->getByTitle('Projects');
+            if ($projectGroup) {
+                throw new \RuntimeException('Default project group already exists!');
+            }
+
             $group = new ProjectGroup();
             $group->setTitle('Projects');
 
diff --git a/src/PHPCensor/Store/Base/ProjectGroupStoreBase.php b/src/PHPCensor/Store/Base/ProjectGroupStoreBase.php
index c4c2b393..a8aed1a8 100644
--- a/src/PHPCensor/Store/Base/ProjectGroupStoreBase.php
+++ b/src/PHPCensor/Store/Base/ProjectGroupStoreBase.php
@@ -30,7 +30,13 @@ class ProjectGroupStoreBase extends Store
 
     /**
      * Get a single ProjectGroup by Id.
-     * @return null|ProjectGroup
+     * 
+     * @param integer $value
+     * @param string  $useConnection
+     * 
+     * @return ProjectGroup|null
+     * 
+     * @throws HttpException
      */
     public function getById($value, $useConnection = 'read')
     {
@@ -39,7 +45,8 @@ class ProjectGroupStoreBase extends Store
         }
 
         $query = 'SELECT * FROM {{project_group}} WHERE {{id}} = :id LIMIT 1';
-        $stmt = Database::getConnection($useConnection)->prepareCommon($query);
+        $stmt  = Database::getConnection($useConnection)->prepareCommon($query);
+
         $stmt->bindValue(':id', $value);
 
         if ($stmt->execute()) {
@@ -50,4 +57,34 @@ class ProjectGroupStoreBase extends Store
 
         return null;
     }
+
+    /**
+     * Get a single ProjectGroup by title.
+     *
+     * @param integer $value
+     * @param string  $useConnection
+     *
+     * @return ProjectGroup|null
+     *
+     * @throws HttpException
+     */
+    public function getByTitle($value, $useConnection = 'read')
+    {
+        if (is_null($value)) {
+            throw new HttpException('Value passed to ' . __FUNCTION__ . ' cannot be null.');
+        }
+
+        $query = 'SELECT * FROM {{project_group}} WHERE {{title}} = :title LIMIT 1';
+        $stmt  = Database::getConnection($useConnection)->prepareCommon($query);
+
+        $stmt->bindValue(':title', $value);
+
+        if ($stmt->execute()) {
+            if ($data = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+                return new ProjectGroup($data);
+            }
+        }
+
+        return null;
+    }
 }
diff --git a/src/PHPCensor/Store/Base/UserStoreBase.php b/src/PHPCensor/Store/Base/UserStoreBase.php
index edbbb507..e8ab3f35 100644
--- a/src/PHPCensor/Store/Base/UserStoreBase.php
+++ b/src/PHPCensor/Store/Base/UserStoreBase.php
@@ -68,7 +68,8 @@ class UserStoreBase extends Store
         }
 
         $query = 'SELECT * FROM {{user}} WHERE {{email}} = :email LIMIT 1';
-        $stmt = Database::getConnection()->prepareCommon($query);
+        $stmt  = Database::getConnection()->prepareCommon($query);
+
         $stmt->bindValue(':email', $value);
 
         if ($stmt->execute()) {