FlightPathOBM:
With Part 77, the approach obstacle evaluation goes to the FAF or 50 thousand feet from runway end, but the missed eval surface ends 10 to 14 thousand feet from the end of the runway.
For the benefit of lurkers, Part 77 applies only in airspace under FAA jurisdiction. It consists of imaginary surfaces around an airport that a proponent wanting to construct a building or antenna must first consider. If the proposed construction penetrates one of those imaginary surfaces then the proponent must submit the proposed construction to the FAA regional office for an "Aeronautical Study," which will result in either a "No Hazard" or "Hazard" determination in due course.
If a proposed object will exceed 200 feet in height, it must be submitted under Part 77 no matter how far it may be from an airport.