Appraisers' Free Forum

**Bill Caudell** · Posted: Fri Apr 11, 2008 5:50 pm Post subject: GBA

I have seen several different commercial appraisal reports and am surprised at the difference in the way they are measured.
Some have all portions of the building except anything under 3' ceiling height. Some do include porches, garages, etc. that are part of the function of the building, some do not.

Just wondered how some of you measure GBA?
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Bill Caudell

**Edd Gillespie** · Certified General Joined: 13 Aug 2007 Posts: 2282

I measure income producing SF and compare it with total SF. That gives me an efficiency ratio which may also be a basis of comparison if needed and applicable. The problem, as usual, is finding comparable sale properties that were measured, sold or rented with the same formula. There is not an absolute standard that I am aware of
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Edd “In the real estate economy, there are no guarantees that reason will prevail in a market where emotions run high and the amount of misinformation runs deep.” Jonathan Miller in The Matrix. So what’s an appraiser to do?

**Bill Caudell** · Posted: Fri Apr 11, 2008 8:58 pm Post subject:

M L · Posted: Fri Apr 11, 2008 9:10 pm Post subject:

Ditto to Edd... I measure GBA and GRA. For the income approach, I usually use the SF in the contract as that's what both parties have agreed is GRA.
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