No, they were actual homes.
1Co 16:19 ¶ The churches of Asia salute you. Aquila and Priscilla salute you much in the Lord, with the church that is in their house.
These were not the modern day equivalent of the "home churches" where folks pick up a bible and teach what they feel. The Churches were in building that happened to be homes -- large homes. As time went by they met in large basilicas (forum areas) as more became Christians