Demolition of an existing property on an urban site will likely occur: Question 8 options: a) When the site value, under its existing use, exceeds the cost of demolition b) When the site value, assuming a new use, exceeds the value of the site under its existing use, plus the cost of demolition c) When the highest and best use of the property is a taxpayer use, such as a parking lot or recreational park d) After the building has been abandoned for a reasonable period of time