Kamijou Family's 2nd Residence

The Kamijou Family's 2nd Residence was the residence that the Kamijou family moved into after Kamijou Touma moved into Academy City. The house is elevated with a garage located underneath it, and seems to have enough space to contain an office for Touya as well as for the various souvenirs he keeps.

Background
According to Touya, they moved into the house a month before the Angel Fall Arc and had contacted Touma about it. For some unknown duration of time Kamijou Touya stockpiled his souvenir collection that contained magical properties and arranged them in accordance with feng-shui, in order to counteract the misfortune that Touma has.

After leaving the house accidentally unlocked to go to Touma's location, it becomes a temple for the spell and activates Angel Fall.

Light Novel Version
Insert Light Novel Version here.

Anime Version
In the Toaru Majutsu no Index anime adaptation presents the house differently to its novel counterpart. Here, Touma and Motoharu is forced to visit the house after they start suspecting Misha Kruezhev as the culprit behind Angel Fall – since she didn't touch Touma's right hand – and she went with Touma's mother who has forgotten to lock the house.

Touma and Motoharu arrive before Misha and Touma's mother, here, they discover the various souvenirs Touya has kept in the household. They also discover that Touya's appearance is unchanged regardless of the affects of Angel Fall. Because of this, Motoharu concludes that Touya is the culprit behind Angel Fall, however, Shiina and Misha arrives, which the latter discovers as well, which forces Touma to pursue her as she would kill Touya for being the spellcaster.

The house is later destroyed by Motoharu using his Shikigami pistol, as it is the ritual location for Angel Fall, and in it's destruction negates Angel Fall. It is later being rebuilt, though until it is finished, Touya and Shiina is forced to go back to their old residence.