Move the buildings. I'm on the side of the trees ! haha
City planning is serious stuff but sometimes not done seriously. Or at least thoughtfully. One of my friends always talks about thinking of how a decision will affect the next seven generations. That is a bit ambitious for most situations but certainly a different way of thinking.
It seems daft to me @steven-patrick because the people planting the trees must surely have know how big they would grow and, given how close to the buildings they were planted it's pretty obvious there would be issues.
Mind you , I suppose it's no different than all the houses that were built on flood planes in the last 50 years and then everyone gets upset when they are flooded. Duh!