The Sanban Residence is where Kuki Sanban (Numbuh 3) and her family live. It appears to be quite large and expensive, in a rich neighborhood, and in very good shape, probably because Genki is the head of accounting at Mr. Boss's Firm.
In Operation: S.N.O.W.I.N.G., it was the first time the inside of Numbuh 3's room was seen. However, it was only her bed and her window with curtains. Which appears to be really expensive and high quality.
In Operation: H.O.T.S.T.U.F.F., the house becomes uninhabitable when Numbuh 3 disobeys her father's constant warnings about touching the house's thermostat and fools around with it too much. As a result of this, Kani is forced to stay at Sector V's treehouse unless the thermostat is turned down. Numbuhs 1, 2, and 5 are forced to go inside the lava-filled house and turn down the temperature. Despite the heat-possessed Numbuh 3 trying to stop them, they succeed in turning down the thermostat and returning the house and Numbuh 3 to normal. Unfortunately, while the house and Numbuh 3 were saved, Kani found Sector V's thermostat and turned it down after being unable to stand the heat inside the treehouse.
- Kani Sanban - Father
- Genki Sanban - Mother
- Kuki Sanban (Numbuh 3) - Older daughter of Kani and Genki, sister of Mushi.
- Mushi Sanban - Youngest daughter of Kani and Genki, sister of Kuki.
- The family has been living there since Numbuh 3 and Mushi were born as revealed in Operation: H.O.M.E..