Looking for guidance on property classifications

[Joel Colvos]

I am conducting research on potential investment properties in Kitsap County, Washington State using the counties GIS website and I have some questions concerning zoning and 'property class'.  I understand generally the zoning restrictions that interest me, i.e. Rural Residential vs. various types of Commercial Zoning etc.  But the more research I do the more I run across vast inconsistencies with 'property class'.  For example single family homes being classified as 'cabins', empty land being classified as 'single family residential', some properties that I know are not buildable still being classified as 'single family residential'.  Does the property class mean anything other than how that particular piece of property is currently being classified for property tax assessment within the county?  Or does it possibly mean some further legal restriction that I don't understand?  I'm seeing suspicious classifications all around Kitsap including Bremerton, Port Orchard, Bainbridge Island, etc.

Bonus Question: does anyone have insight into property class '911- Common area' and how this is determined and taxed by the county.  I see lakefront properties sometimes classified this way.