An ADA modification is a change an employer, business, or government agency must make so a person with a disability can do a job, use a service, or shop, eat, and receive care on equal terms with everyone else. The Americans with Disabilities Act calls these changes “reasonable accommodations” in the workplace and “reasonable modifications” for government programs and public-facing businesses, but the practical idea is the same: adjust the rule, the space, or the tool so the disability stops being a barrier. You request one by telling the responsible party what you need and why, and, if the need isn’t obvious, backing it up with focused medical documentation.
Which Part of the ADA Covers Your Situation
The law splits the duty across three titles, and the title decides who you ask and what standard applies.
Title I — Employment. If you work for, or are applying to, an employer with 15 or more employees, Title I applies. The employer must provide reasonable accommodations to a “qualified” worker — someone who can do the essential functions of the job with or without help.1Office of the Law Revision Counsel. 42 USC Chapter 126 Subchapter I – Employment Common accommodations include adjusted schedules for medical treatment, screen readers and other assistive technology, modified training materials, restructured job duties, changed testing formats, and interpreters. When no accommodation lets the current job work, reassignment to a vacant position is the final option the law recognizes. Reassignment applies only to current employees, not applicants, and the employer doesn’t have to create a new position, displace another worker, or offer a promotion.
Title II — State and local government. Public schools, courts, police departments, parks, and public transit fall here. No qualified person with a disability can be excluded from or denied the benefits of any government program because of their disability.2Office of the Law Revision Counsel. 42 USC Chapter 126 Subchapter II – Public Services Title II uses a “program access” test: the government has to make the program available to you, not necessarily make every building fully accessible. If a public meeting is scheduled in a second-floor room with no elevator, the town can move the meeting to an accessible room instead of installing one.3ADA.gov. State and Local Governments
Title III — Public accommodations. Restaurants, hotels, retail stores, medical offices, banks, gyms, theaters, daycare centers, and private schools are among the businesses covered.4Office of the Law Revision Counsel. 42 USC 12181 – Definitions These businesses have to remove physical barriers when doing so is “readily achievable” and change their policies when needed to serve customers with disabilities.5Office of the Law Revision Counsel. 42 USC 12182 – Prohibition of Discrimination by Public Accommodations A restaurant that bans animals must allow service animals. A store that requires customers to stand in a particular line must adjust that rule for someone who can’t stand. Businesses also have to supply auxiliary aids — qualified interpreters, assistive listening devices, Braille or large-print materials — when needed to communicate effectively, and they can’t charge the customer for them.
How to Request a Workplace Accommodation
You don’t need magic words, a form, or a lawyer. Telling your employer “I need a change because of my medical condition” is enough to start the process. There’s no requirement to put it in writing, though a written request creates a record you’ll want if the matter goes sideways later.
Identify the Barrier and, If You Can, a Fix
Describe the specific problem you’re running into and, if you have one in mind, suggest a solution. You don’t need the perfect fix — a concrete starting point just moves things faster than an open-ended request. Frame it around what you can’t currently do and what would let you do it: the workstation, the schedule, the equipment, the policy.
Expect a Documentation Request Only When the Need Isn’t Obvious
If your disability or the reason for the accommodation isn’t obvious, the employer can ask for medical documentation. That documentation should describe the functional limitation and explain why the requested accommodation is needed. Your employer cannot demand your complete medical records — only information relevant to the specific request.6U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship Under the ADA Anything medical the employer collects has to sit in a separate confidential file, not your regular personnel record, and can only be shared with supervisors who need to know about restrictions or accommodations, first-aid staff if an emergency response might be needed, and government investigators.7Office of the Law Revision Counsel. 42 USC 12112 – Discrimination
The Interactive Process
Once you make the request, the employer is expected to engage in what the EEOC calls an “interactive process”: a back-and-forth conversation about options.6U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship Under the ADA Sometimes the right accommodation is obvious and the conversation takes five minutes. Other times it takes weeks. The employer should respond promptly; unnecessary delay can itself violate the ADA. If your first choice would cause the employer real difficulty, the employer has to consider alternatives rather than deny the request outright.
How to Request a Modification From a Business or Government Office
Outside the workplace, the process is much less formal. You can ask a business or a government office to adjust a policy or provide an auxiliary aid on the spot. There’s no paperwork requirement, and where the modification is straightforward — moving a meeting to an accessible room, waiving a no-animals rule for a service dog, providing a large-print menu — the response should be immediate. If the answer is no, ask why and get the name of the person deciding; that’s the record you’ll need later.
When a Request Can Legally Be Refused
The duty to modify is broad but not unlimited, and the limit is different in each title.
In employment, the employer can refuse a particular accommodation if it would cause “undue hardship” — significant difficulty or expense measured against the size of the business, its resources, and how it operates.1Office of the Law Revision Counsel. 42 USC Chapter 126 Subchapter I – Employment Cost alone rarely wins that argument for a large employer.
For public accommodations, the barrier-removal duty is capped at what is “readily achievable” — accomplishable without much difficulty or expense given the business’s size and resources.4Office of the Law Revision Counsel. 42 USC 12181 – Definitions That’s a lower bar than “undue hardship.” Rearranging furniture to clear a path, lowering a counter section, or installing a grab bar typically qualifies. A business can also refuse a policy change if the change would fundamentally alter the nature of what it offers.5Office of the Law Revision Counsel. 42 USC 12182 – Prohibition of Discrimination by Public Accommodations
For state and local governments, the limit is “undue financial and administrative burden,” assessed against the entity’s overall resources, not the budget of one department.
If Your Request Is Denied or You Face Retaliation
Workplace Complaints and Deadlines
For workplace discrimination, you generally have 180 days from the discriminatory act to file a charge with the Equal Employment Opportunity Commission. That deadline extends to 300 days if your state has its own anti-discrimination enforcement agency, which most do.8U.S. Equal Employment Opportunity Commission. Time Limits for Filing a Charge Weekends and holidays count toward the total, so don’t wait. Federal employees have a separate process and a much shorter window: 45 days to contact an EEO counselor. Using your employer’s internal grievance or mediation process does not pause the clock on filing with the EEOC. Successful Title I claims can result in back pay, compensatory damages, and, where the discrimination was intentional, punitive damages.
Complaints Against Businesses and Governments
Private plaintiffs suing a business under Title III can get a court order forcing the modification and can recover attorney’s fees if they win, but federal Title III cases don’t award individual monetary damages. Some state laws parallel the ADA and do allow damages, so where you live matters. The Department of Justice can also bring its own case and seek civil penalties: as of the 2025 inflation adjustment, the maximum is $118,225 for a first violation and $236,451 for each later violation.9Federal Register. Civil Monetary Penalties Inflation Adjustments for 2025 Title II claims against state and local governments follow an enforcement structure similar to federal civil rights claims under the Rehabilitation Act.
Retaliation Is a Separate Violation
The ADA prohibits retaliation against anyone who requests an accommodation, files a complaint, or takes part in an investigation, and it also bars coercion or intimidation for exercising rights under the law.10Office of the Law Revision Counsel. 42 USC 12203 – Prohibition Against Retaliation and Coercion This protection applies even if your underlying request is denied. An employer that fires a worker for asking about a schedule change, or a business that bans a customer for asking for an auxiliary aid, has committed a separate violation on top of whatever the original issue was.
A Note on Housing
Modifications to a home, apartment, or condo common area generally fall under the Fair Housing Act, not the ADA. The FHA requires landlords and homeowners’ associations to allow tenants with disabilities to make reasonable modifications to their living space at the tenant’s expense. The ADA works differently: it requires covered employers, governments, and public-facing businesses to provide, and often pay for, accessibility features. If your issue is a rental unit or housing complex, look to the FHA. If it’s your workplace, a government office, or a business you’re trying to use, the ADA is the law that applies.