I'm working on a project in an old one story industrial building that has been re-purposed as a multi tenant office building. It has multi points of entry directly from the exterior into each individual tenant, as well as entry points into a common corridor that has restrooms. It has a building common electrical room typical of an industrial building, but it has roof top units for mechanical, no no shared mechanical room. Would this be considered a flex building and fall into the industrial building floor measurement standard or the office building floor measurement standard? It's basically an old industrial box with separate tenants carved out and minimal common area.

Thanks