<p>Are there any tools available for calculating the <strong>average number of lines of code per method</strong>?</p>

<p>I want to know the average size of each method, not just the total number of lines in the project. The per method count will allow me to measure how simple each method is.</p>

<p>This will be calculated as part of the build process, and displayed on a dashboard. The idea being that we can see if the average size of each method is increasing. And this will flag the possibility that code complexity is increasing and we may need to think about refactoring.</p>

I am not sure if it does that, but searching, after your previous post, what is cyclomatic complexity, I went to the related Wikipedia page which pointed to
Code Analyzer
.
There they say:
When counting for HTML or JSP files, it will count LoC correctly for
  javascript and vbscript code embedded within the <script> tag.
I don't know if this count is dispatched per method, but it might be worth taking a look (it is a free tool).