Question: Can I create sub-projects in Basecamp (i.e. a project within another project)?
Answer: At this time, it's not possible to create sub-projects in Basecamp. But there's a friendly workaround that will allow this functionality: Create a new company and make it the "primary company" for the various projects you'd like to group together. Here's how this works:
1. Go to your People tab and click the link to add a new company.

2. Instead of adding a company name, make the company name your "area" or category. For instance, you can create a company called "Finance" or "Legal".

3. Don't add any users to this company.
4. Now, go to a project that falls under the category "Legal". Click the "People & Permissions" tab, and click the link to add the "Legal" company you just created to the project.

5. Click the "Change project permissions" link at the top of the screen.

6. Then click the "Add a company to the project" link at the top of the screen.

7. Then choose the company you just created and add it to the project.

8. Now you'll want to make this company the primary company for this project. To do this, click the "Project Settings" link in the upper right of the screen.

9. Go to the section that says, "Select the primary company for this project" and choose the company you just created.

10. When you do this, you'll see the projects listed in your sidebar like this:
FINANCE
- Project 1
- Project 2
LEGAL
- Project 1
Here's a screenshot:

This method lets you group your projects under an umbrella label and access them easily in one location.
Related:
"Primary Company": How can I change the company a project is listed under? [Basecamp Help]
How do I delete a company? [Basecamp Help]




