diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index d8ebbbc6e8de8386641a91c5bb43155baf382328..089f166152d2f001d211f871d576f8777a8e5f7b 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -782,6 +782,10 @@ class Auth(object):
             error (Error): The error that should be raised if user is to be
             blocked
             """
+        if self.hs.config.hs_disabled:
+            raise AuthError(
+                403, self.hs.config.hs_disabled_message, errcode=Codes.HS_DISABLED
+            )
         if self.hs.config.limit_usage_by_mau is True:
             current_mau = yield self.store.get_monthly_active_count()
             if current_mau >= self.hs.config.max_mau_value:
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index b41d595059a300867b7b96db1cc0bd0dc89dd737..466240248aebe75e8cf4a7bcf64b219f985db4b0 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -56,6 +56,7 @@ class Codes(object):
     CONSENT_NOT_GIVEN = "M_CONSENT_NOT_GIVEN"
     CANNOT_LEAVE_SERVER_NOTICE_ROOM = "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM"
     MAU_LIMIT_EXCEEDED = "M_MAU_LIMIT_EXCEEDED"
+    HS_DISABLED = "M_HS_DISABLED"
 
 
 class CodeMessageException(RuntimeError):
diff --git a/synapse/config/server.py b/synapse/config/server.py
index 8fd23197590c59a8c29ebf64324ac78155f3db08..2e1e2f5961c47bbdaaa599844ef65b480274a9a0 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -75,6 +75,10 @@ class ServerConfig(Config):
                 "max_mau_value", 0,
             )
 
+        # Options to disable HS
+        self.hs_disabled = config.get("hs_disabled", False)
+        self.hs_disabled_message = config.get("hs_disabled_message", "")
+
         # FIXME: federation_domain_whitelist needs sytests
         self.federation_domain_whitelist = None
         federation_domain_whitelist = config.get(
diff --git a/tests/api/test_auth.py b/tests/api/test_auth.py
index 5dc33983003d1a57ae063be9685c5af28605b469..fbb96361a8bcc99810190dd921bf342daebd73fd 100644
--- a/tests/api/test_auth.py
+++ b/tests/api/test_auth.py
@@ -21,7 +21,7 @@ from twisted.internet import defer
 
 import synapse.handlers.auth
 from synapse.api.auth import Auth
-from synapse.api.errors import AuthError
+from synapse.api.errors import AuthError, Codes
 from synapse.types import UserID
 
 from tests import unittest
@@ -469,3 +469,12 @@ class AuthTestCase(unittest.TestCase):
             return_value=defer.succeed(small_number_of_users)
         )
         yield self.auth.check_auth_blocking()
+
+    @defer.inlineCallbacks
+    def test_hs_disabled(self):
+        self.hs.config.hs_disabled = True
+        self.hs.config.hs_disabled_message = "Reason for being disabled"
+        with self.assertRaises(AuthError) as e:
+            yield self.auth.check_auth_blocking()
+        self.assertEquals(e.exception.errcode, Codes.HS_DISABLED)
+        self.assertEquals(e.exception.code, 403)
diff --git a/tests/utils.py b/tests/utils.py
index ec40428e74384f62de724293b827e14a490fc5be..a0aa38d26488f8d79341bde3ef587ba276dc9365 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -74,6 +74,8 @@ def setup_test_homeserver(name="test", datastore=None, config=None, reactor=None
         config.media_storage_providers = []
         config.auto_join_rooms = []
         config.limit_usage_by_mau = False
+        config.hs_disabled = False
+        config.hs_disabled_message = ""
 
         # disable user directory updates, because they get done in the
         # background, which upsets the test runner.