Don't count your chickens before they hatch. Need I remind you:
Boston is looking great right now, but not all of these will get built in their current iteration.
Of the nine skyscrapers you named that are not yet complete, I (optimistically) estimate we'll see six of these proposals come to fruition. That is still pretty good though! In order of likelihood:
- Millenium Tower is nearly complete and will open this summer.
- Four Seasons Tower is under construction, but hasn't gone above ground. We have seen projects stall for years at this point in the past (DTX). But, this will probably be completed in its current form.
- Congress Street Development (Residential Tower) is the first phase of this project. Not to nitpick, but I think it will only be 480'. As long as HYM doesn't go under, or something similar, we will probably see this break ground within the year.
- Copley Place Tower is supposed to break ground within the year. Remember, this was originally supposed to break ground in 2009 before the recession hit. Our economy is going well right now, but this has been proposed for ten years now and the developer has been less than transparent about this project over the years.
- TD Garden Tower - The podium is being built now, and that will take a few years. It is not that far fetched that the towers don't get completed in this cycle and are delayed or revised.
- Congress Street Development (Office Tower). As a future phase of this project, and still awaiting a major tenant (I think), this project is not yet a sure thing.
- South Station Tower - I like the fact that this has been revisited, but this project has been proposed in some form since 1963. Hines has been planning/proposing this project since 1997. Ma Nishtana?
- 111 Federal Street - This has been proposed and thwarted multiple times in the past. It also has to go for review and get approved, no small task at all. Millenium knew how to work the process by the time they proposed their skyscraper to fill a huge hole in the ground. This proposal has a tougher road ahead of it.
- 1 Bromfield - Major zoning questions, there has been pushback, and nobody really knows exactly what is being proposed.
You may be newer than me (apologies if you are not) to following Boston developments, but it gets frustrating. Not all of what you see proposed ends up happening, and much of it gets cut down in size. They aren't all getting built. Hopefully, most of them get built.