Comparative Market Analysis adjustments

[Heera S.]

How do you know what value to input to adjust a comparable property when comparing to your subject property in a comparative market analysis (CMA). Are bedrooms/bathrooms worth a fixed value or does it depend on the local market? Where can I find these values or how do I compute them? I always find it tough adjusting values for year built, square footage, # of bedrooms, # of bathrooms, etc...