Living on the premises is not the source of an ADA exempton.http://smallbusiness.chron.com/ada-affect-small-businesses-36227.html
It doesn't matter how old your building is, if you provide goods or services to customers at that location, you are legally required to abide by the ADA's accessibility provisions. The legislation requires a business to remove structural barriers to access -- such as replacing steps with a ramp -- when this is "easily accomplishable without much difficulty or expense." Like many of the ADA regulations, your ability to comply with the requirements is assessed based on the company's overall resources.http://www.ada.gov/regs2010/smallbusiness/smallbusprimer2010.htm#readilyachievable
The ADA requires that small businesses remove architectural barriers in existing facilities when it is "readily achievable" to do so. Readily achievable means "easily accomplishable without much difficulty or expense." This requirement is based on the size and resources of a business. So, businesses with more resources are expected to remove more barriers than businesses with fewer resources.http://www.ada.gov/qa_existingpools_titleIII.htm
In 2010, the Department of Justice
published updated regulations under the Americans with Disabilities Act (ADA). These regulations adopted the 2010 Standards for Accessible Design (2010 Standards), which, for the first time, contain specific accessibility requirements for a number of types of recreational facilities, including swimming pools, wading pools, and spas.http://www.ada.gov/qa_existingpools_titleIII.htm#q4
states:My pool already existed before the effective date of the new rule. What am I required to do to provide pool access to customers with mobility disabilities?
The ADA requires businesses to make existing pools accessible only when it is "readily achievable" to do so. Readily achievable means that providing access is easily accomplishable without much difficulty or expense. The 2010 Standards provide the benchmark, or goal, for accessibility in existing pools. (See Question 2 for the 2010 Standards requirements for pools). However, owners of existing pools need to comply with the 2010 Standards only to the extent that doing so is readily achievable for them.
The 2010 Standards for pool lifts require lifts to be fixed and to meet additional requirements for location, size of the seat, lifting capacity, and clear floor space. Therefore, if a business can provide a fixed lift that meets all of the 2010 Standards’ requirements without much difficulty or expense, the business must provide one. If no fully compliant lift is readily achievable for the business, the business is not obligated to provide a fully compliant lift until doing so becomes readily achievable. In addition, the business may provide a non-fixed lift that otherwise complies with the requirements in the 2010 Standards if doing so is readily achievable and if full compliance is not.Are there any tax credits or deductions to help me comply?
Please see that last link for more details.
I hope this information is helpful.