The Courthouse is available in your city at level 53.

Quest Steps

Step 1/10:
Train 5 Architects (University)
Help your friends with 50 buildings
Fill Bakery with goods 30 times

Step 2/10:
Collect 4 Seals (Administration)
Ask friends for 6 Fire helmets
Collect 12 Protection suits (Textile Factory => any)
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Step 3/10:
Train 7 Designers (College)
Collect 10 Ropes (Textile Factory => any)
Collect 5 Wooden beams (Cargo Port)
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Step 4/10:
Produce 10 lots of Cables (Construction Factory)
Collect 4 Metal beams (Cargo Port)
Ask friends for 5 Pipes
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Step 5/10:
Collect profits from Flower Kiosk 35 times
Save up 120000 coins
Collect 10 Units of water (Water Tower)
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Step 6/10:
Collect 12 Green paints (Flower Kiosk)
Train 3 Builders (College)
Ask friends for 6 Glasses
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Step 7/10:
Collect 2500 goods
Fill the Coffee House with goods 15 times
Collect profits from Shoe Shop 35 times​

Step 8/10:
Produce 12 lots of Concrete compounds (Construction Factory)
Collect 4 Reinforcements (Cargo Port)
Collect 15 Nails (friends’ cities, random drop)

Step 9/10:
Produce 5 lots of Monitors (Electronics Plant)
Collect 12 Fire extinguishers (Water Tower)
Ask friends for 7 Security cameras​

Step 10/10:
Collect 12 Fertilizers (Farm => Yellow Pepper)
Collect 15 Jasmines (Flower Kiosk)
Collect 5 Chairs (Family Restaurant)
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Rewards: 2000 coins and 7 Superbucks