greg... It says "insurable value" but does not provide a definition of "Insurable Value."
I suppose that can be true but I know of no banker that uses the CA to determine the amount of insurance. Insurance underwriters have their own software.They want the cost approach so that they can determine how much to insure the property per square foot.
The cost approach is ALWAYS applicable for an improved property. It's the only approach that is always applicable.
I agree. However, only when the approach is correctly applied. Problem is that most appraisers completing the cost approach back into the approach rather than to utilize a recognized source of data. Furthermore if there is external obsolescence present, the appraiser utilizing the approach seldom can explain how the percentage for the external depreciation was derived. My experiences has seen this in the numerous retrospective reviews completed. The reason why the approach is not utilized or requested by most clients (including HUD), is that it is known the approach is being backed into.
Apparently the reliability of the cost approach far exceeds the ability of the average appraiser to prepare a defensible CA. I not to far back in time, saw a cost approach where the appraiser gave the RCN of $50 per SF when $85 was a minimum....but it worked perfectly for the age considering she undervalued the lot by 50% or more.