Jones basement apartment (Mirage)

In the Mirage TMNT continuity, the basement apartment of the Jones' apartment building is a and the smallest of the building's dwellings. It has direct access to the New York City sewer. The live here temporarily, making it one of their s.

History
In City at War, the of  owns the building and is the landlady of its tenants. Planning to retire and move to Florida, she sells the building to who has recently moved back to New York from Los Angeles. Before the sale is finalized, April lives in the studio apartment in the basement. When Casey returns with his stepdaughter from Colorado, he reunites with April in this apartment.

In Volume 2, April, Casey and Shadow have moved in together in the in the top floor, and they have allowed,  and  to live secretly in the basement apartment. But its living conditions are crammed, and Raph moves out to look for a new place to live. Leo and Mikey soon discover a new sewer lair of their own, where and all four turtles move to after the end of Volume 2.

In Image TMNT volume 3 which branches off from the Mirage TMNT continuity (but since declared non-canon by Peter Laird), remains and it and becomes his personal apartment.