פירוש על סוכה 6:20

All of these [statements about] a house are written [in the Bible] - "the doorposts (mezuzot) of your house" (Deut. 6:9); "when you build a new house" (Deut. 22:8); "the one who owns the house shall come" (Lev. 14:35); "[a man] who sold a dwelling-house [in a walled city]" (Lev. 25:29); "[a man] who built a new house" (Deut. 20:5).

Akhsedra - which is before the house and which we call a "portico."

"For its purposes" - for a single person to stay overnight.

"This [small house] is not suitable for its purpose [of being a house]" - for every house is always made to be a permanent dwelling.

And he comes to reduce it - To reduce the height of the space from twenty [amot] by adding height to the bottom