The federal government has issued several opinion letters on the ADA in response to direct inquiries since 1992.
These letters are to be considered informal guidance only.

Apartments

• Application of the Americans With Disabilities Act (ADA) to leasing offices in apartment complexes.
• Application of the Americans with Disabilities Act of 1990 (ADA) to residential apartment buildings.

Historic preservation

• Alterations to historic properties
• Preservation of historic buildings
• Allowing modifications when full compliance would threaten or destroy the historic value of a historic building
• Installing a ramp would affect the beauty and historicity