is there a vacancy % factor that lenders will not lend beyond

[Terry Lao]

I own a 4plex, which is one of 23 buildings. I recently found out that there could be 30-35 units that are currently vacant out of a possible 92. This is a vacancy percentage of 33-38%. 

Would fannie mae or freddie mac look at the vacancy % and is there a upper limit cannot go beyond?

Terry