Gross Building Area defined by FHA

[Cranedog]

Hello everyone

My question is whether FHA has a definition for Gross Building Area as it pertains to the 1025 form. I see it in F/F handbook that it is GBA if finished but not in FHA. In addition, do they specify anywhere if a finished or unfinished basement in a 2-4 family mixed-use property is part of the total building area when calculating the qualifying percentage of residential to commercial

 

[TerryRohrer]

"The GBA is the total finished area (including common areas – hallways, interior stairways, etc.) of the improvements, above and below grade, based upon exterior measurements. Use the same method for calculating the GBA of comparable sales and rentals."

AllRegs Online

 

[Cranedog]

"The GBA is the total finished area (including common areas – hallways, interior stairways, etc.) of the improvements, above and below grade, based upon exterior measurements. Use the same method for calculating the GBA of comparable sales and rentals."

AllRegs Online

This looks like F/F definition? and does not address mixed use calculations toward percentage residential and percentage non-residential especially if unfinished based is integral to the fist floor non residential use.