Mr. Gillespie, Ms. Potts,
Recent site sales should have been used to develop the opinion of site value. If recent site sales were not found, then the site value should have been found using either extraction or allocation, or even both used for consideration.
IF any of the above had been properly done, this so called EO for "poor economy" would have inherently been reflected in the opinion of site value because it also, if the site sales or comps used for extraction / allocation are properly selected, reflects the location of the subject. Since "economy" is affecting the entire general area, and not a case of an external smelly junk yard next door, this is a discussion of market location and not appropriately one of an adjustment for external depreciation that should only affect some properties in some of the area. Not ALL properties in the entire area which should be reflected already in the comps!
To then AGAIN adjust for "Poor Economy" affecting the entire area IMO is now either double dipping or showing a sucky job of site value analysis was done in the first place with a later adjustment pulled out of thin air, with no support for it, to correct the lousy site value opinion.
Also, if the cost to build even the physical depreciated improvement is so great no one will pay it in the area due to a lack of jobs, we are only proving either the houses have all come to the end of their economic lives and the H&BU analysis for one SFR improvement is incorrect, or the value of a SFR site in the area has to decline. It either is not ecomomcally affordable to build a SFR house there due to costs to do so versus the contributory value to the land and land costs, so the land is no longer appropriate for SFR, or the value of the land (location) has to go down until it is economcally feasible.
The site value should have been much lower and the SCA probably SHOULD have had negative market condition (time) adjustments in it. The appraiser used historical land sales, unadjusted for market conditions (time) in a declining market, and opined a land value too high as a result.