ADA compliant concern

We are a private swim club in Ohio operating as a member owned entity. We want to expand our deck area and the issue of ADA compliance came up at a meeting. Does anyone here know what the rules are for this federal law and how it applies to a privately owned club such as ourselves and probably thousands across the country? We'll need to submit plans to the local building authority for a permit and I'm concerned what their response might be. It may open a large can of worms. Thanks for any input.