Folders for subdomain-specific files beside Laravel's folder

I'd like to make a Laravel app, where the subdomains' folders are beside the Laravel project folder. If a file (eg. a controller file) is not found in the current subdomain's folder, then it's loaded from the main project folder.

So my folder tree would look like this:

• Laravel project (all Laravel files)
  • app
  • Http
    • Controllers
    • ...
  • ...
  • ...
• Subdomain1 (only subdomain specific files)
  • app
  • Http
    • Controllers
    • ...
  • ...
  • ...

Can I have Laravel behave like this?

Thank You for your help!

via Chebli Mohamed