I realize that all tile effects take place immediately after the tile is placed in your estate. However some tile effects seem to occur one time such as some of the Building tile effects. Example: Boarding House: take 4 worker tiles from the general supply. Other tile effects seem to occur immediately or on any of your subsequent turns, such as by placing any of the Knowledge tiles in your estate. That is, their effects can occur multiple times.
1)Do I understand this correctly?
2) Is there a general rule as to which tiles' effects occur one time (immediately after they are placed in your estate) and which tiles' effects occur immediately (if you choose to do so) and for the rest of the game on your turns once they are placed in your estate?
You sort of nailed it. Knowledge tiles are lasting effects. All other tiles are one-time only. (I guess the animals might be a mix...pigs already placed score again when newly placed pigs in the same field score...)
Yep - yellow tiles are whole-game effects (well, those that aren't purely for endgame scoring), while building effects are all just one-off when you place them. (I guess mines are the other "long-term effect" ones, as they give income at the end of the round they're placed and every subsequent round.)
I don't have the rules in front of me right now, and I always find the phase/round terminology in this game confusing. But I mean the thing of which there are 5 in each game, not the thing of which there are 25