.The FAA's current rules require buildings that are located within three nautical miles, or approximately three and half miles, of airports to be fewer than 200 feet above ground level.
The agency said it is necessary to consider lowering the height limit now because areas around major airports are becoming more developed.
"Structures as diverse as microwave towers to office buildings and wind turbines are being built in ever-increasing numbers near many airports," the FAA said in its notice. "While developers may erect these structures, the FAA must consider the impact of the structures on the safe operation of flight and their impact on the safe, efficient use and preservation of the navigable airspace and airport capacity and efficiency."
The agency noted it does not have the power to prevent developers from constructing new buildings, even if the lower height limit is eventually implemented.
"The FAA is not authorized to grant or deny construction projects," the agency said in its notice about the proposed height limit change. "Rather, Part 77 defines a number of obstruction standards that are used to identify obstacles that may have an adverse impact on the navigable airspace.
"Even upon the issuance of a Determination of Hazard, the developer is free to continue construction," the agency continued. "However, zoning authorities and private insurers may be reluctant to permit construction of the structure, given the FAA's determination that it poses a hazard to navigation."
The FAA issued a notice of proposed policy about the potential change on April 28 and is accepting comments until June 27.
The agency noted that existing buildings that are taller than the new limits would be grandfathered in, but the more stringent rules would be applied to changes to those structures.
