Building the Sukkah on Motzei Yom Kippur:

Motzei Yom Kippur:[1] On Motzei Yom Kippur one begins building the Sukkah, [or at least talking about building it[2]], in order to leave one Mitzvah and enter to another Mitzvah.

To build the Sukkah the day after Yom Kippur:[3] It is a Mitzvah [if possible[4]] to [finish[5]] building the entire Sukkah the day after Yom Kippur, immediately after one leaves [and arrives home from] Shul.[6] [However, one should not compromise on the quality of the work simply in order to complete it by that day, and if he must delay the building until the next day/s for the sake of bettering its quality then it may be done.[7]]

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[1] Rama 624:5

Ruling of Admur: Vetzaruch Iyun as to why this was omitted by Admur.

Other Opinions: Some Poskim rule one is to build the Sukkah before Yom Kippur in order so its Mitzvah becomes included in one’s verdict for the coming year. Others arbitrate that the walls are to be built before Yom Kippur while the Sechach is placed after Yom Kippur. [Shaareiy Teshuvos]

[2] Sefer Haminhagim p. 59; Otzer Minhagei Chabad p. 255; Aruch Hashulchan 624:7; Kaf Hachaim 624:35

[3] Admur 625:1; Rama 625; Maharil Hilchos Sukkah; M”A 625:1; M”B 625:2

[4] M”B 625:2

[5] M”B 625:2 based on Rama 624:5 who writes that the start of the building is to take place on Motzei Yom Kippur

[6] The reason: The reason for this is because one is not to delay the performance of a Mitzvah which he has the ability to fulfill. [Admur ibid; Rama ibid; Maharil ibid; See Mechilta Bo 9]

[7] Mateh Efraim 624:15; Piskeiy Teshuvos 625:3