I wonder if you could run plumbing through, then a secondary floor just above it so that the apartment floors are a foot above where the office space floor woul

I wonder if you could run plumbing through, then a secondary floor just above it so that the apartment floors are a foot above where the office space floor would have been. But the natural light is the biggest issue if you ask me. I would never buy an apartment without morning winter sun shining into every main living area. (North here in Australia)