I know you can use ctrl+end to be sent at the end of the file.
Is there a shortcut key or can you make one to place you at the end of a (sub)chapter?

How would Word identify what you regard as "the end of a (sub)chapter" (i.e. what designates when one (sub)chapter ends and another begins)?

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Just before the next heading of the same type (e.g. if the subchapter starts with heading 1, it ends just before next heading 1)

You might want to consider using the Navigation Pane.

You can use Ctrl+G to GoTo a heading.

You can also use F5 (Goto)>Heading if you know the heading number, or Ctrl-H (Find)>More>Format>Style if you know the Heading Style name.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]