Siman 388
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א אִם לֹא עֵרְבוּ הַחֲצֵרוֹת יַחַד, וְגַם לֹא נִשְׁתַּתְּפוּ בַּמָּבוֹי, מֻתָּר לְטַלְטֵל בְּכָל הַמָּבוֹי כֵּלִים שֶׁשָּׁבְתוּ בְּתוֹכוֹ, בֵּין עֵרְבוּ חֲצֵרוֹת עִם הַבָּתִּים בֵּין לֹא עֵרְבוּ. וּלְהָרַב רַבֵּנוּ מֹשֶׁה בַּר מַיְמוֹן, דַּוְקָא כְּשֶׁלֹּא עֵרְבוּ חֲצֵרוֹת עִם הַבָּתִּים, אֲבָל עִם עֵרְבוּ חֲצֵרוֹת עִם הַבָּתִּים אֵין מְטַלְטְלִין בַּמָּבוֹי אֶלָּא בְּאַרְבַּע אַמּוֹת.
1 The law if the courtyards did not establish an eruv together and also did not partner in the alleyway. Containing 1 section. If the courtyards did not make an eruv together and also did not make a partnership in the alleyway, it is permitted to carry throughout the entire alleyway items that rested in it on Shabbat—whether the courtyards made an eruv with the houses or they did not make an eruv. According to our teacher Rabbi Moshe bar Maimon, this applies specifically when they did not make an eruv of courtyards with the houses. But if they made an eruv of courtyards with the houses, one may only carry in the alleyway within four cubits.