Adding Additional Person to Lease

[Derek VanWinkle]

I've got a SFH rented out to 4 college students for the next two years. They signed a lease, and want to add an additional person to the lease. I didn't know quite how to approach it. The home is a 4/2, but parking is already pretty tight for 4 cars. I thought about telling them that I would go up $100-125/mo if they wanted to do this to cover the extra wear and tear by a fifth person. The lease technically allows for 2 people per bedroom though, so I could possibly see some push back on that.

Any thoughts? 

Thanks!