Is establishing mosques in apartments a neglected Sunnah?

The questioner : Can we say that mosques, or praying in mosques, or mosques in apartments are a neglected Sunnah? Mosques in apartments means some texts specify them. So, is it said to be a neglected Sunnah, or is it not said?

The Shaykh : Repeat.

The questioner : I mean, I read in some texts about the issue of specifying mosques in apartments.

The Shaykh : Specifying mosques in apartments.

The questioner: Yes.

The Shaykh : You mean establishing mosques in apartments.

The questioner : Yes, establishing.

The Shaykh : As for specifying mosques in apartments, this is...

The questioner : From the construction, I mean.

The Shaykh : This is not said.

The questioner : From the construction, specifying from the construction.

The Shaykh : Establishing mosques in apartments.

The questioner: Yes.

The Shaykh : Yes, what is it?

The questioner : Does it mean that it is said now that not establishing these mosques in apartments is a neglected Sunnah, or is this statement not made?

The Shaykh : It is not said to be a neglected Sunnah. But is this a recommended matter? The neglected Sunnahs are those where the practice was carried out initially until it became a followed Sunnah. So, if there is a recommended matter—tell me where you want to go?
The student : Our brother asked... I mean, this is about establishing a mosque in the house, a mosque, meaning a place for prayer. No one puts any work or business in it, so it remains a customary place in the house.

The Shaykh : Yes.
The student : This place is for prayer; it is not a condition, meaning a specific area or something... a place for prayer. It will be better if the house is spacious.

The Shaykh: Yes.
The student : He designates a room, so this means...
Another student: I swear, my Shaykh, I mentioned this statement according to what I understood from you, may Allah reward you with good. That this is actually a recommended Sunnah. I conveyed it to some of our brother engineers, including our brother-in-law, that when they pray in the houses of our Muslim brothers, they suggest to them this suggestion that they designate a room in the middle of the house or on the side or something, and the children get accustomed to it... they pray in it, and the women with the women, so that the features of prayer appear in the house. So I said to him, what is your opinion according to what I conveyed to you from the hadith of the Messenger of Allah (peace and blessings be upon him) , so I said to him: I swear, the Shaykh says in this that it is a Sunnah. So I said to him, because in some of the engineering designs, Shaykh, now the ones who are doing them, these disbelievers... the ones who design them.

The Shaykh: Yes.
The student : They are making a smoking room.

The Shaykh: Allahu Akbar, Allahu Akbar!
The student : I said to them, look, the disbelievers are working, they are making a special room for smoking, meaning it has a window, and whoever wants to smoke goes there so that the rest of the family is not harmed. So I said to them, now we rely on the Sunnah in our worship.

The Shaykh : The Messenger of Allah (peace and blessings be upon him) told the truth: .
The student: Yes, by Allah.

The Shaykh : .
The student : Yes, I swear, I believed in Allah, Glory be to Allah the Great... prayer in the house, establishing a special place for prayer.

The Shaykh: Allahu Akbar.
The student : I mean, actually, it is a great appearance.