To construct buildings in your town, you need materials like Slabs, Red Paint, Nails, Hammers, Bricks, and Glass. There are a few ways to get them:
1. Send off trains loaded with goods. They come back with construction materials.
2. Make a habit of visiting the market. It has special deals on materials every once in a while.
3. Open treasure chests. They can be found in the mine or your friends' towns, brought by ship from the islands, and earned as a reward for sending fully loaded airplanes.
4. Find treasure chests at sea. They start appearing at level 29 once you restore the Port, and they can be found around the islands once a day. If a chest is available, the game will automatically zoom in on its location.
5. Play at the House of Luck to win construction materials as prizes.
6. Take part in weekly regattas. You can get construction materials as rewards for strong finishes.
7. Use Township Cash to buy any materials you need.

Once you reach level 60, you'll need special tools to finish constructing community buildings:
- Drills and Electric Saws starting from level 60.
- Jackhammers starting from level 62.

You can only get these tools at the Tool Exchange when you trade in construction materials.