price difference between bedrooms?

[Saxxon Rybski]

I'm currently negotiating on a couple properties for a rehab.I Live and invest in Tucson AZ and i'm having a hard time determining the price differences between 2 bedroom to a 3 bedroom and a 3 bedroom to a 4 bedroom extra. 

Can someone please assist me with inform on how to verify the price difference between the number of bedrooms in my area. 

[Account Closed]

@Saxxon Rybski you'll want to pull comps for both two, three, and four bedrooms in the area then determine what if any price per sqft difference there is among units in similar condition. Honestly the price difference between 3 and 4 beds is a square footage conversation 9 out of 10 times. The amount of difference in value between a 2 or 3 bed is super dependant on the area.