Abu Bakr b. Abdullah b. Qais reported on the authority of his father that Allah’s Messenger (ﷺ) said that in Paradise there would be for a believer a tent of a single hollowed pearl the breadth of which would be sixty miles. It would be meant for a believer and the believers would go around it and none would be able to see the others.
Reference : Sahih Muslim 2838 a In-book reference : Book 53, Hadith 27 USC-MSA web (English) reference : Book 40, Hadith 6804 (deprecated numbering scheme)
SubhanAllah, such huge houses. May Allah make us the residents of paradise. Ameen.