Give this a read - The Ultimate Guide to Grading Cleveland Neighborhoods.

Composition shingle, warranty(15yr, 20, 25 year, 30 year, 40 year, 50 year, life warranty), tiles, metal (all come different grades), preparation, under sub-roof wood, vents, sky tunnels....

@Luke Moore    If you haven't chosen your flooring yet here's what I've learned -- Our place is much bigger (twice the size - 36 beds but can really hold more if we wanted )    and much older.Anyways some things I've noticed on LVP -- pay the extra for commercial grade stuff (IE like what will go in a hospital)   It has a much thicker mill/wear layer on top - but will be $5-7 a sq foot for material - pricey but longevity wise should be worth it - that is what we will be putting in all our common areas.   

@Bruce Lynn would you please give a little more details on  Forney, TX. is it a A or B or C grade location?

-Slope: If your property isn't flat, grading work or raised foundations can be necessary and costly.

They may have listed it on another line, as below grade area, which is what they should've done, if part of it is below grade.

Even investment grade homesprices have begun to rise.

, and the grade (B,C,D?)

Sorry, but to get my point across I have to tell you how much money I earned by selling my stinky 6 single family homes and changed my investment model to multi-unit properties and I learned simple 5th grade math that I am going to explain for the 1,000th time that should blow your mind from here to the moon and back. 

I have talked to others that are around $300 for slab on grade single story so $150 psf sounds great in California, if you can do it!!!