You have to include EP in a cost approach.
no you don't...imho.
The building would not be there if the developer perceived no profit in building it in the first place.
hmmm. are you sure? If the owner is building a building to house his business (say he manufactures the King Size Klunge) then the building is a necessary business expense but as an expense, is not a fungible asset that can be resold and capture that "EP" unless they sell the patent to the Klunge as well,..so where would he could ever recapture that EP? Never in the building, rather his
anticipation of future profits of the business...EP is thusly better described as a part of the Business Enterprise Value and is not a tangible asset of the land/building.
Same with a poultry barn or dairy parlor. The value is in the poultry growing contract not the building. The barn costs X dollars. EP was applied on some barns back 10 years ago when an influx of Hmong buyers (inexperienced and eagar mullets) bought farms and paid a premium to the folks who actually built the barns....guess what. The barns are selling for a bundle less now. So how secure was that EP? It wasn't...in fact, only a fool paid it. too bad. Now you have a tax to add to the crippling disability of paying too much for property.
EP is a fairy tale made of fairy dust and there is an excellent argument that any such value is a land residual value, not a BEV contribution...and I bet in that case, your building "EP" is less than zero.
There is a discussion of both EP and Ent. Incentive in 12th ed. of The Appraisal of Real Estate... it is long on vague conjecture about the difficulty in calculating EP and suggests that you best be careful that you haven't accounted for EP twice... I suggest that if you are planning on making the profit off the intangible business model pursued as an owner-operator, it is a mistake to add EP for the building as well. Again, the "Bible" of appraisers the aforementioned App. of RE, suggests that
Entrepeneurial profit is realized only when the property is first sold, even if the sale takes place years after the property was built. Over time, EP becomes obscured by the appreciation in property value..
....and obscured by the depreciation in value as well...and if so, then how in the *&^% do you calculate it..and I argue that you cannot. Commercial properties SELL for whatever the best available buyer will pay for the building which will be modified for that person's business model...that is why I have long observed that in my home county I have never seen a commercial property sell for as much as the county valued the enterprise....it is always a lower price than the assessed market value.
, the notion of a long-run business value component for retail property is refuted and the land residual value theory reasserted, while at the same time admitting the possibility of first owner entrepreneurial or development-based value creation. It is argued that any excess property productivity will eventually become attached to the land, and last that option values are an important aspect of land values that would be affected when suggesting that the appropriate value of a given property is the cost of substituting adjacent property.
from
http://business.fullerton.edu/finance/Journal/papers/pdf/past/vol10n02/v10p203.pdf
also
http://www.aptcnet.com/articles/2005/Separating_Business_Siegel.htm
http://www.dev-res.com/newsarticles/RealEstateFinanceJournal_Spring2008.pdf
http://www.oft.gov.uk/shared_oft/reports/comp_policy/oft1020o.pdf
http://www.businessinsider.com/mba-mondays-enterprise-value-and-market-value-2010-8