The Secretariat of the National Assembly or lower house of parliament served notices to some 100 former lawmakers who were defeated in the polls, asking them to vacate the hostel by May 20.
At least 36 former lawmakers of the PPP are still occupying their suites, including former ministers and former premier Ashraf.
When the politicians failed to move out even after a week, the Capital Development Authority cut off power to their suites on Monday.
The lawmakers pay only Rs 4,000 a month as rent for the suites and comparable accommodation in the heart of Islamabad would cost at least Rs 80,000 to Rs 120,000.
Also Read
The notice served to former lawmakers by the National Assembly Secretariat said they "must vacate the suites at the Parliament Lodges and the Government Hostel by May 20 after which suites will be vacated forcibly".
Most of the former lawmakers who have refused to vacate their suites belong to the Pakistan People's Party, PML-Q, PML-N and Awami National Party.