One has to understand what the criteria standards are for obstacle and terrain eval. When ATC states they dont have the obstacle data, they are in actuality right on.
Terrain and obstacle surfaces are evaluated, and the CONTROLLING obstacle per sector is reported, not all, only the highest one. Obstacle evals are done on a 5 year basis, and most are beyond that, so any construction in the last 5 years, will only show up IF it is the new control.
Obstacles shown on charts are for information only, as in, you are on approach, and there is a building or mountain close on final, you understand that yes, this was accounted for...
In most places, there is NO mandatory requirement, that the person is able to ascertain, to submit the construction to the FAA or relevant authority, as part of the construction permitting.