29 Oct 2026
Why upgrade?
New building methods let you grow your home past Class 2. A higher class gives you a nicer, roomier house, handy if you are tired of the old one or want space for a new family. Your house is also where you summon the Sword Master boss.
What each upgrade costs
| Upgrade | Option 1 | Option 2 |
|---|---|---|
| Class 2 → 3 | Class 3 House Permit + 2,000,000 silver | 8 Refined gems + 3,000,000 silver |
| Class 3 → 4 | Class 4 Upgrade Certificate + 5,000,000 silver | 2 Super Gems + 4,000,000 silver |
The gem route costs more silver but skips the permit or certificate. Gems are explained in Gems.
How to upgrade
| Step | What to do |
|---|---|
| 1 | Pack up your furniture first: click Setting at the top right of the screen, then Furniture → Close. |
| 2 | Get the items and silver for one of the two options in the table. |
| 3 | Hand them to the House Admin in Twin City (342,527). |
| 4 | Once you have Class 3, repeat with the Class 4 cost to reach Class 4. |
After Class 4
The house can grow further. A Class 5 house can become Class 6 during the Deluxe House Building event, which unlocks a farm, a pet garden and the Moon Platform.
Sources
Game pictures: © TQ Digital / NetDragon · co.99.com
