Email is easy! Send your documents as attachments to: building@berkeley.edu. Make sure your email denotes your project details (Permit number if one has been issued, client reference number if not) so we know what the documents pertain to.
If your files are too big for email, you can use either of Berkeley's file sharing tools. We've created handy tutorials forcreating a download link in Boxorcreating a download link in Google Drive.