What are the compliance dates mandated by the new 2010 ADA Standards?

On or after March 15th, 2012 all newly constructed or altered facilities must comply with the requirements in the 2010 ADA Standards. If elements in existing facilities already comply with the 1991 ADA Standards and are not being altered, entities are not required to make changes to those elements to bring them into compliance with the 2010 ADA Standards.

For Title II entities, if the start date for construction is on or after March 15, 2012, all newly constructed or altered State and local government facilities must comply with the 2010 ADA Standards.

For businesses that are covered under Title III, the compliance date for the 2010 ADA Standards for new construction and alterations is determined by:

• the date the last application for a building permit or permit extension is certified to be complete by a State, county, or local government;
• the date the last application for a building permit or permit extension is received by a State, county, or local government, where the government does not certify the completion of applications; or
• the start date of physical construction or alteration, if no permit is required.

If that date is on or after March 15, 2012, then new construction and alterations must comply with the 2010 ADA Standards.

Source: http://www.ada.gov/revised_effective_dates-2010.htm.

For additional information, take a look at the following resources:

FAQ: Is my building "grandfathered in" under the older 1991 ADA Standards for Accessible Design or do I need to comply with the 2010 ADA Standards?

FAQ: What does the ADA require in new construction?

Fact Sheet: Opening Doors to Everyone