Calculating area of pixles for certain Aspect value per specific area?

SawsanHadi

I have the aspect (raster file) for the roof of buildings at the city scale. Now I want to calculate the area of each aspect group per building. I tied zonal statistics, zonal geometry and etc . Also reclassified the aspect layer and tried to add the Building ID. But I didn't get the desired result. Is there a way to do that? Kindly see the attached

capture_1.PNG

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DanPatterson_Retired

to do it on a per building basis you need the individual 'zones' which can be accomplished using.

Region Group—Help | ArcGIS Desktop 

the resultant would be your zone file, then a zonal count would give you the number of cells (times cell area) per aspect by building