The "condo tower" site is almost certainly the block between Alling and Appler, which has been mostly demoed/cleared over the past few years. The majority of the block is owned by "NORTH ALAMO PROPERTIES LLC". Quick googling reveals that they purchased the alley on that block from the City recently:
https://sanantonio.legistar.com/Legi...921&FullText=1
They also applied for rezoning a couple of years ago:
https://www.google.com/url?sa=t&rct=...xFqSptotuXN5GX
For up to 175 units an acre. Assuming they're eventually able to buy up the holdouts and get the whole block, they could be able to build up to about 300 units. Not bad.
The "office building" is even more mysterious. The only undeveloped corner of Broadway and Grayson is where Still Golden just opened, but I feel like a building that's about to be demoed wouldn't be getting a new tenant. Maybe it's the buildings next to it? Or the houses behind it? Or they got it mixed up with the Josephine St corner?
Edit: Further googling has revealed the North Alamo Properties LLC is associated with Victor Andonie, who is President of this company:
http://www.msgmanagement.com/about/ Seems like they own and operate some medium sized office buildings around town. He also appears to have developed the Museum Townhomes across from the Witte and a small subdivision in Alamo Heights. Not sure what all this means, but thought I'd throw it out there.