diff --git a/docs/ipc b/docs/ipc
index e1a1fc5f..8cfb21d0 100644
--- a/docs/ipc
+++ b/docs/ipc
@@ -623,6 +623,9 @@ output (1)::
 	outputs, CRTCs or output properties).
 mode (2)::
 	Sent whenever i3 changes its binding mode.
+window (3)::
+	Sent when a client's window is successfully reparented (that is when i3
+	has finished fitting it into a container).
 
 *Example:*
 --------------------------------------------------------------------
@@ -696,6 +699,30 @@ mode is simply named default.
 { "change": "default" }
 ---------------------------
 
+=== window event
+
+This event consists of a single serialized map containing a property
++change (string)+ which currently can indicate only that a new window
+has been successfully reparented (the value will be "new").
+
+Additionally a +container (object)+ field will be present, which consists
+of the window's parent container. Be aware that the container will hold
+the initial name of the newly reparented window (e.g. if you run urxvt
+with a shell that changes the title, you will still at this point get the
+window title as "urxvt").
+
+*Example:*
+---------------------------
+{
+ "change": "new",
+ "container": {
+  "id": 35569536,
+  "type": 2,
+  ...
+ }
+}
+---------------------------
+
 == See also (existing libraries)
 
 [[libraries]]
diff --git a/include/i3/ipc.h b/include/i3/ipc.h
index 2380edab..2a3321b5 100644
--- a/include/i3/ipc.h
+++ b/include/i3/ipc.h
@@ -96,4 +96,7 @@ typedef struct i3_ipc_header {
 /* The output event will be triggered upon mode changes */
 #define I3_IPC_EVENT_MODE                       (I3_IPC_EVENT_MASK | 2)
 
+/* The window event will be triggered upon window changes */
+#define I3_IPC_EVENT_WINDOW                     (I3_IPC_EVENT_MASK | 3)
+
 #endif
diff --git a/src/manage.c b/src/manage.c
index ff7fdc6d..a2319912 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -10,6 +10,9 @@
  *
  */
 #include "all.h"
+#include "yajl_utils.h"
+
+#include <yajl/yajl_gen.h>
 
 /*
  * Go through all existing windows (if the window manager is restarted) and manage them
@@ -72,6 +75,35 @@ void restore_geometry(void) {
     xcb_aux_sync(conn);
 }
 
+/*
+ * The following function sends a new window event, which consists
+ * of fields "change" and "container", the latter containing a dump
+ * of the window's container.
+ *
+ */
+static void ipc_send_window_new_event(Con *con) {
+    setlocale(LC_NUMERIC, "C");
+    yajl_gen gen = ygenalloc();
+
+    y(map_open);
+
+    ystr("change");
+    ystr("new");
+
+    ystr("container");
+    dump_node(gen, con, false);
+
+    y(map_close);
+
+    const unsigned char *payload;
+    ylength length;
+    y(get_buf, &payload, &length);
+
+    ipc_send_event("window", I3_IPC_EVENT_WINDOW, (const char *)payload);
+    y(free);
+    setlocale(LC_NUMERIC, "");
+}
+
 /*
  * Do some sanity checks and then reparent the window.
  *
@@ -428,6 +460,9 @@ void manage_window(xcb_window_t window, xcb_get_window_attributes_cookie_t cooki
     }
     tree_render();
 
+    /* Send an event about window creation */
+    ipc_send_window_new_event(nc);
+
 geom_out:
     free(geom);
 out:
diff --git a/testcases/t/205-ipc-windows.t b/testcases/t/205-ipc-windows.t
new file mode 100644
index 00000000..e3b7196c
--- /dev/null
+++ b/testcases/t/205-ipc-windows.t
@@ -0,0 +1,43 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+
+use i3test;
+
+my $i3 = i3(get_socket_path());
+$i3->connect()->recv;
+
+################################
+# Window event
+################################
+
+# Events
+
+my $new = AnyEvent->condvar;
+$i3->subscribe({
+    window => sub {
+        my ($event) = @_;
+        $new->send($event->{change} eq 'new');
+    }
+})->recv;
+
+open_window;
+
+my $t;
+$t = AnyEvent->timer(after => 0.5, cb => sub { $new->send(0); });
+
+ok($new->recv, 'Window "new" event received');
+
+done_testing;