Design Challenges Season 10 is the tenth Design Challenge season. It started December 10, 2021, and ends January 7, 2022. It contains 2 old Contest of Mayors buildings from Season 10 and 1 new building. It is the seventh season to use the Blueprint Exchange reward format. It is the first season to have rewards depending on Design Challenge Leagues. It takes 4,500 blueprints to unlock all 3 buildings or 2,000 to unlock Alhambra. There were 7 challenges this season. They were Hygge Life, City of Gardens, Entertainment Capital, Camping Hideaway, Winter Holiday Fest, City of Bridges, and New Year's Party City.
| Reward | Blueprints |
|---|---|
| Alhambra | 2,000 |
| Umiad Bhawan Palace | 1,500 |
| Buckingham Palace | 1,000 |
| 3 Platinum Keys | 600 |
| 3 Golden Keys | 300 |
| 2 of each Expansion Item | 150 |
| 2 of each Beach Item | 250 |
| 2 of each Mountain Item | 250 |
| 5,000 Simoleons | 50 |
| 50 SimCash | 200 |
| 100 SimCash (Silver League) | 250 |
| 5,000 War Simoleons (Silver League) | 200 |
| 200 SimCash (Gold League) | 300 |
| 5 of each Storage Item (Gold League) | 400 |
Previous Season: Design Dash Season 3
Next Season: Design Challenges Season 11