Inside your home, with probably staircases to go down and then go out of the building to reach the mosque, the impediments are more serious than that of a medium-size river. If a congregation is not advisable on both sides of such a river, it is more so for a person in his home joining the congregation in the mosque. Indeed, if we were to say that it is appropriate, then it would be appropriate for the whole neighborhood to join the congregation from within their homes. The Imam would then be offering the prayer with a fewer people in the mosque and with more people joining him in their flats and apartments in surrounding buildings. That is not the purpose of the congregational prayer.
Congregational prayer serves a very important social purpose.
It would be missed if people were to stay in their homes and join the congregation in their separate flats. The proper congregation is when they come to the mosque and join together. If women are keen to join the congregational prayer, they should also go to the mosque where a place should be provided for them.