I snooped around a little more and found two PDF files showing the building elevations showing all the heights. The only thing is apparently there are two different designs, and one is a little taller than the other. I'll send an email on Monday to someone with the developer to get a confirmed height on the official final plan.
First is the taller design.
440 feet to the mechanical screen. This would be the official building height.
421 feet to the mechanical penthouse roof.
406 feet to the main roof.
386 feet is the top floor height.
30 floors
5th tallest in Austin.
The shorter design was listed as the "final plan". Unfortunately it's not quite 400 feet.
396 feet to the mechanical screen. This would be the official building height.
379 feet to the mechanical penthouse roof.
363 feet to the main roof.
343 feet is the top floor height.
29 floors.
12th tallest in Austin.
Here is the page with the two files showing the two different heights. Use the PDF with the taller design to do the measurements. The lobby elevation is 474 feet. The PDF for the shorter design doesn't show the lobby elevation, but I would assume that number wouldn't be different between both plans.
https://www.austintexas.gov/devrevie...erRSN=10839323