Rehab, Flipping, and Costs

[Diego Hernandez]

As I am filtering among a list of properties to invest in, I am trying to rule out properties that are “clearly” not worth looking into.

Is there a rule of thumb for calculating the cost to tear down a building ($ / sq. ft)?

What are the parameters for this number and how does it change with respect to a change each parameter?

For example, how many additional $/sq.ft. does it cost for houses that are older than 1978, smaller/bigger than X sq. ft., class A/B/C/D buildings/zones, etc.