/usr/include/dbus-1.0/dbus/ is in libdbus-1-dev 1.4.18-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dbus-1.0/dbus/dbus-address.h
/usr/include/dbus-1.0/dbus/dbus-bus.h
/usr/include/dbus-1.0/dbus/dbus-connection.h
/usr/include/dbus-1.0/dbus/dbus-errors.h
/usr/include/dbus-1.0/dbus/dbus-macros.h
/usr/include/dbus-1.0/dbus/dbus-memory.h
/usr/include/dbus-1.0/dbus/dbus-message.h
/usr/include/dbus-1.0/dbus/dbus-misc.h
/usr/include/dbus-1.0/dbus/dbus-pending-call.h
/usr/include/dbus-1.0/dbus/dbus-protocol.h
/usr/include/dbus-1.0/dbus/dbus-server.h
/usr/include/dbus-1.0/dbus/dbus-shared.h
/usr/include/dbus-1.0/dbus/dbus-signature.h
/usr/include/dbus-1.0/dbus/dbus-threads.h
/usr/include/dbus-1.0/dbus/dbus-types.h
/usr/include/dbus-1.0/dbus/dbus.h