Do I need another home appraisal?

I had my home appraised Feb. '06 and took out a mortgage. (the home was paid for) I now need additional monies and want to get a HELOC (home equity line of credit.) It's been exactly one year since the initial appraisal, do I now need another one? If so, why? And what's the time limit, ie., if I had... show more I had my home appraised Feb. '06 and took out a mortgage. (the home was paid for) I now need additional monies and want to get a HELOC (home equity line of credit.) It's been exactly one year since the initial appraisal, do I now need another one? If so, why? And what's the time limit, ie., if I had done this 6 months into the initial mortage would I have needed an additional appraisal?
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