I feel like there could somehow be more to this image. It's a nice visual, but I cannot figure out what it's trying to say to me. Maybe a tighter crop on the building to have less empty sky/water would be helpful.
Obvious tripod use: High. I was thinking of medium/high, but with the very low noise you likely had to use a low ISO.
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 8
Large aperture, high ISO, and lens or body stabilization *could* have pulled this off handheld.