Should i add 2-4 bedrooms before appraisal for Heloc

[Jeremiah F.]

I am wondering how much value additional bedrooms add to the house. Of course I understand maintaining legitimate square footage in these bedrooms is necessary. I'm mainly wondering is there a point that I should not cross, or that's the return won't match the invesment. 

This is my own personal residence please let me know if any more information is needed to answer my question Thanks