Getting Correct # of Bedrooms Updated for Cashout/Appraisal

[Ryan Newport]

Purchasing a triplex that clearly, by all legal definition, has 7 bedrooms. Arguably 8, but I'll let one slide without any debate. Town record shows the property as a 5-bedroom. My question really here is: What's the best way to get the record to reflect the correct # of bedrooms. 

WHY?! Because I KNOW that appraisals are subject. Some appraisals will count it as 7 beds when they walk through, some will take pictures of 7 beds and still mark it as 5-beds because the town card says so. I'm planning a cashout, and the bedroom count will make a significant difference. 

Appreciate any insight!