The Comprehensive ADA Guide

Everything the ADA requires, title by title, in plain English — with statutory citations, enforcement paths, and real-world compliance examples. Pair this with the full statutory text for authoritative citation.

1 · The ADA at a glance — history & purpose

The Americans with Disabilities Act became federal law on July 26, 1990, signed by President George H. W. Bush. Congress drew directly from the framework of the Civil Rights Act of 1964, extending to people with disabilities the comprehensive anti-discrimination protections already available on the basis of race, color, sex, religion, and national origin.

The ADA built on the narrower Rehabilitation Act of 1973 § 504, which had barred disability discrimination only by federal agencies and federally funded programs. The ADA reached much further — into private employment, private businesses open to the public, state and local governments, and telecommunications.

In 2008 the ADA Amendments Act (ADAAA) expanded the definition of "disability" after a series of Supreme Court rulings had narrowed it. The ADAAA instructed courts to construe disability "in favor of broad coverage" and invalidated several key rulings that had made it hard for people with impairments like epilepsy, diabetes, and cancer to qualify for protection.

2 · Who is covered (and who is not)

Covered:

• Individuals with disabilities — as defined in § 12102, plus people with a record of such impairment or regarded as having one.
• People associated with someone with a disability — you cannot discriminate against someone because their spouse or child has a disability.
• Private employers with 15+ employees (Title I).
• All state and local government entities regardless of size (Title II) — including public schools, public universities, public transit.
• Nearly all private businesses open to the public (Title III) — with no size threshold.
• Private entities operating transportation (Title III) and commercial facilities (new-construction requirements).

Not covered:

• The federal government and its employees (covered separately by § 501 of the Rehabilitation Act).
• Religious organizations and entities controlled by religious organizations (Title III exemption for "religious organizations or entities controlled by religious organizations, including places of worship").
• Bona fide private membership clubs (Title III exemption — narrow; courts scrutinize "bona fide").
• Private employers with fewer than 15 employees (Title I threshold).

3 · How "disability" is defined

Under § 12102, a person has a disability if they:

1. have a physical or mental impairment that substantially limits one or more major life activities;
2. have a record of such an impairment (e.g., history of cancer in remission); or
3. are regarded as having such an impairment — even if they do not.

"Major life activities" is broad — statutorily defined to include caring for oneself, performing manual tasks, seeing, hearing, eating, sleeping, walking, standing, lifting, bending, speaking, breathing, learning, reading, concentrating, thinking, communicating, working — and "major bodily functions" like immune, digestive, bowel, bladder, neurological, brain, respiratory, circulatory, endocrine, and reproductive functions.

The ADAAA added a critical rule: mitigating measures do not count in deciding whether an impairment is substantially limiting. A person with diabetes controlled by insulin is still disabled under the ADA; a person with a prosthetic leg is still disabled. (Ordinary eyeglasses and contact lenses are the one exception.)

4 · Title I — Employment (§§ 12111–12117)

Title I bars private employers with 15 or more employees, employment agencies, labor organizations, and joint labor-management committees from discriminating against a qualified individual on the basis of disability in hiring, firing, compensation, training, and other terms of employment.

Reasonable accommodations

Employers must provide reasonable accommodations to qualified applicants and employees with disabilities — unless doing so would cause an undue hardship (significant difficulty or expense). Typical accommodations:

• Modifying work schedules or offering remote work
• Providing accessible tools, screen readers, captioning
• Restructuring non-essential job functions
• Reassignment to a vacant position
• Time off for medical treatment

The interactive process

The ADA does not require employers to guess at accommodations. It requires a good-faith, documented back-and-forth between employer and employee to identify what works. Employers who skip this conversation lose cases — courts treat it as the core compliance duty.

Medical exams & inquiries

Before a job offer, employers may not ask disability-related questions or require medical exams. After an offer, medical exams are allowed if required of all entering employees in that category. For current employees, exams and inquiries must be job-related and consistent with business necessity.

Who enforces Title I

The U.S. Equal Employment Opportunity Commission (EEOC). Employees must file an EEOC charge within 180 days of discrimination (300 days in states with their own anti-discrimination law) before filing suit.

5 · Title II — Public Services & Transportation (§§ 12131–12165)

Title II applies to every state and local government entity, regardless of size. It prohibits excluding qualified individuals with disabilities from programs, services, and activities — and requires program access as a whole, not item-by-item access to every facility.

Program access

A city does not have to make every public building accessible — but it does have to make every program accessible. If two county courthouses host hearings and only one is accessible, hearings with disabled parties must be scheduled at the accessible building.

Transition plans

Public entities with 50 or more employees had to adopt a self-evaluation and transition plan identifying physical barriers and scheduling their removal. Still relevant today — transition plans remain enforceable records of what was promised and when.

Public transportation

Fixed-route buses must be accessible; new rail cars must be accessible; complementary paratransit services must be provided for riders who cannot use the fixed route. Amtrak and commuter rail have their own accessibility timetables (Subtitle B Part II).

Who enforces Title II

The DOJ Civil Rights Division (for most programs), the Department of Transportation (for transportation), HHS (for health and social services), HUD (for housing), Education (for education), and Interior (for parks). Private lawsuits are also available under § 12133.

6 · Title III — Public Accommodations & Commercial Facilities (§§ 12181–12189)

This is the title that matters most to private business owners. Title III prohibits discrimination on the basis of disability in the full and equal enjoyment of the goods, services, facilities, privileges, advantages, or accommodations of any place of public accommodation. There is no small-business exemption.

Twelve categories of public accommodations (§ 12181(7))

1. Places of lodging (hotels, inns, motels — over 5 rooms)
2. Establishments serving food or drink (restaurants, bars)
3. Places of exhibition or entertainment (theaters, concert halls, stadiums)
4. Places of public gathering (auditoriums, convention centers, lecture halls)
5. Sales or rental establishments (bakeries, grocery stores, clothing stores, hardware stores, shopping centers)
6. Service establishments (laundromats, dry cleaners, banks, barber shops, beauty shops, travel services, shoe repair, funeral parlors, gas stations, professional offices including doctors, lawyers, and accountants, pharmacies, insurance offices, hospitals, and other healthcare providers)
7. Stations used for public transportation (terminals, depots)
8. Places of public display or collection (museums, libraries, galleries)
9. Places of recreation (parks, zoos, amusement parks)
10. Places of education (nursery, elementary, secondary, undergraduate, postgraduate — but not purely religious schools)
11. Social service center establishments (day care centers, senior citizen centers, homeless shelters, food banks, adoption agencies)
12. Places of exercise or recreation (gyms, health spas, bowling alleys, golf courses)

Three duties under Title III

1. Remove architectural barriers in existing facilities where readily achievable (without much difficulty or expense).
2. Make policies, practices, and procedures accessible when reasonable modifications are needed.
3. Provide auxiliary aids and services for effective communication — sign language interpreters, large-print materials, screen reader-compatible documents, etc.

New construction & alterations

Buildings first occupied after January 26, 1993 had to be designed and constructed in accordance with the ADA Accessibility Guidelines (now the 2010 ADA Standards for Accessible Design). Alterations to existing facilities trigger compliance for the altered portions.

Who enforces Title III

The DOJ Civil Rights Division — and, critically, private individuals. A Title III plaintiff can sue directly in federal court for injunctive relief plus attorney's fees. This is the legal pipeline that produces the bulk of website-accessibility lawsuits.

7 · Title IV — Telecommunications (47 U.S.C. § 225)

ADA Title IV amended the Communications Act of 1934 — it is codified at 47 U.S.C. § 225, not in 42 U.S.C. Chapter 126. Title IV required common carriers to provide telecommunications relay services (TRS) so that people with hearing or speech impairments could communicate with hearing people over the phone.

Today this has evolved to cover TTY, video relay (VRS), IP Relay, speech-to-speech, and captioned telephone services. The FCC enforces.

Title IV also mandated closed captioning for federally funded public service announcements.

8 · Title V — Miscellaneous Provisions (§§ 12201–12213)

Title V is the "housekeeping" title — but do not ignore it; some of its provisions are litigation-critical.

• § 12203 Anti-retaliation — Employers and businesses cannot retaliate against someone for asserting ADA rights or participating in an ADA investigation. Retaliation claims are often easier to prove than the underlying discrimination claim.
• § 12205 Attorney's fees — Prevailing plaintiffs can recover reasonable attorney's fees and costs. This is the economic engine behind Title III litigation.
• § 12201 Construction — The ADA does not displace state laws that provide more protection.
• § 12210 Illegal use of drugs — Current illegal drug use is not protected; individuals in recovery or participating in supervised rehabilitation are protected.
• § 12211 Definitions exclusions — Transvestism, transsexualism (as enumerated here; note subsequent case law), pedophilia, exhibitionism, voyeurism, gender identity disorders not resulting from physical impairments, other sexual-behavior disorders, compulsive gambling, kleptomania, and pyromania are expressly excluded. Current illegal drug use is excluded.
• § 12212 Alternative dispute resolution — Parties are encouraged to use mediation, settlement conferences, and arbitration.

9 · Enforcement — how complaints actually move

10 · Remedies, damages, and attorney's fees

Remedies depend on the title:

• Title I: Back pay, front pay, compensatory damages, punitive damages (capped by employer size), reinstatement, injunctive relief, attorney's fees.
• Title II: Compensatory damages available on proof of intentional discrimination ("deliberate indifference"); injunctive relief; attorney's fees.
• Title III: Injunctive relief only under federal law — no money damages for private plaintiffs. But attorney's fees are fully recoverable, and many state laws (California's Unruh Act, New York's NYSHRL, etc.) layer on money damages. This is why so many Title III cases are filed in California and New York.

11 · Websites, apps, and the ADA

The ADA predates the modern web. The text says nothing explicit about websites. But DOJ has consistently held — and most circuits have agreed — that the websites and mobile apps of businesses with a physical presence (and, in some circuits, websites alone) are "places of public accommodation" under Title III.

DOJ's 2022 guidance points to WCAG 2.1 Level AA as the practical benchmark. In 2024, DOJ finalized a rule under Title II setting WCAG 2.1 AA as the binding digital-accessibility standard for state and local governments (different compliance dates for large vs. small entities).

Common web-accessibility violations cited in demand letters:

• Images missing alt text
• Forms without labels
• Keyboard inaccessibility (dropdowns, modals, custom widgets)
• Text contrast below 4.5:1
• Video without captions
• PDF documents without tagged structure
• Error messages that rely only on color

12 · Intersections with other laws

• Rehabilitation Act of 1973 § 504: Covers federal agencies and federally funded programs. Often litigated alongside the ADA.
• Rehabilitation Act § 508: Requires federal electronic and information technology to be accessible. Cascades into federal contractors through procurement rules.
• Fair Housing Act (FHA): Covers housing — including covered multifamily dwellings, reasonable modifications, and assistance animals (NOT limited to "service animals" the way the ADA is).
• Air Carrier Access Act: Air travel — emotional support animals (rules tightened 2021), wheelchair handling, inaccessible seating.
• Individuals with Disabilities Education Act (IDEA): K-12 special education — works with § 504 and ADA Title II.
• State laws: California (Unruh Act, DPA), New York (NYCHRL, NYSHRL), Illinois, Massachusetts, Minnesota, Oregon all provide damages beyond the ADA. Many are the preferred vehicle for plaintiffs.

Read the full statutory text → Or start with the self-audit checklist →