Metamorphic
Senior Member
- Joined
- Mar 15, 2008
- Professional Status
- Certified Residential Appraiser
- State
- California
I'm not sure I would think of the CA as being "theoretical." To me, it's building a model based on sound principles. It shouldn't matter that there is no realistic possibility of building as an option to buying.
Like any other approach to value....the credibility of the approach is dependent on the quality of the data.
If there's no real lot sale data so you have to boot strap yourself into a lot value, you're using some estimating guide where if you change a check box assumption here or there you can see a pretty big swing in value, and you're depreciating that build cost by using the same tool to estimate the depreciation of a bunch of recent sales that you know even less about the improvements, its pretty clear you're stacking large margins for error on large margins for error.
Its definitely a model based on sound principals, but there are a lot of links between where some market participant wrote a check and the final value indication. To me that reads less credible.
I also have a big question about the validity of the cost data in a market such as we currently have now. Its pretty clear that with the market as depressed as it is you can buy cheeper than you can build. So its a logical assumption that most of the people that are building (those that are responsible for creating the data that will be the in the cost manual tomorrow) are at some level caprice buyers/builders. They're building because its what they want, cost be dammed,...not because its a reasonable economic choice to buying an existing home. I'm concerned that cost data may be less credible because there are too many people in the data mix that are there based on the principal that "there is no substitute for exactly what the want", not based on the principal of substitution.