House Room Upgrades in Animal Crossing: Wild World (DS)

Correction: Animal Crossing: Wild World is a Nintendo DS game (not Wii). The Wii entry is Animal Crossing: City Folk.

In Wild World (DS), your house expands to 5 rooms total by paying off loans to Tom Nook:

1. Main Room (Start)
2. Basement (1st expansion)
3. Second Floor (Upstairs)
4. Left Room
5. Right Room

Each expansion requires a larger loan (final ~800,000 Bells). No Kitchen/Bathroom/Bedroom labels — rooms are blank slates for furniture.

City Folk (Wii) has the same 5-room structure (Main, Basement, 2nd Floor, Left, Right).