How can I successfully challenge an appraisal?

[Teresa M.]

Hey guys, I would really like some advice on how to successfully challenge an appraisal...the guy was comparing my newly renovated property with gutted ones! I sent all of the MLS closed listings to the lender so she could see the pictures to confirm what I'm saying. What else can I do? I really want to get this done ASAP...I've been patient, easy to work with, have gotten all she's asked for right away...and we're still here. Thanks in advance!