Multifamily accessible shower requirements do not come from one universal rule. Project teams should first identify which federal requirements, adopted building code, accessibility standard, funding conditions, and local amendments apply, then select and document a shower model against that framework.
ADA requirements, ICC A117.1 Type A and Type B unit criteria, and Fair Housing Act (FHA) design-and-construction requirements can overlap, but they are not interchangeable.
A multifamily project can be subject to more than one accessibility framework at the same time. The Americans with Disabilities Act (ADA), the Fair Housing Act, Section 504 for certain federally assisted housing, state or local building codes, and ICC A117.1 can each affect different parts of a project. The right question is not simply, “Is this an ADA shower?” It is, “Which requirement applies to this building, this unit, and this bathing room?”
That distinction matters because one project may contain different unit types or accessibility obligations. A public or common-use area may follow one path, while dwelling units follow another. Funding or ownership can add federal requirements. The adopted building code may also require Accessible, Type A, or Type B dwelling units and reference a particular edition of ICC A117.1.
For architects and owner-side teams, the practical sequence is to establish the governing framework first, create a unit-by-unit scoping matrix, and only then evaluate shower models. This article is a planning aid, not legal, architectural, engineering, or code-enforcement advice. Final requirements should be confirmed with the project’s design professionals and authority having jurisdiction.
The terms are often used together because they all concern accessibility, but they do different jobs. ADA is a federal civil-rights framework with accessibility standards for covered facilities. ICC A117.1 is a technical accessibility standard that building codes and other authorities may reference. Type A and Type B are dwelling- or sleeping-unit criteria inside that standard. FHA design-and-construction requirements apply to covered multifamily dwellings and include accessible and adaptable design features.
The table below is a decision aid, not a substitute for project-specific code analysis.
| Framework | What It Is | Project Team Must Confirm | Primary Authority |
|---|---|---|---|
| ADA | Federal civil-rights requirements and accessibility standards for covered facilities | Whether ADA Title II or III and residential-facility provisions apply to the building or space | 2010 ADA Standards; adopted project conditions |
| ICC A117.1 Type A | Technical criteria for a more accessible/adaptable dwelling or sleeping unit | How the adopted code scopes Type A units and which A117.1 edition it references | Adopted building code + referenced A117.1 edition |
| ICC A117.1 Type B | Technical criteria intended to align with FHA accessible/adaptable design intent | How the adopted code scopes Type B units; whether other unit types are also required | Adopted building code + referenced A117.1 edition |
| Fair Housing Act | Federal design-and-construction requirements for covered multifamily dwellings | Whether the building/units are covered and which recognized compliance path or safe harbor is used | FHA statute/regulations, HUD guidance, recognized safe harbor |
The 2010 ADA Standards include requirements for residential facilities in Section 233 and technical criteria for dwelling units in Section 809. They also address bathing facilities and shower compartments in Sections 213 and 608. However, the ADA does not automatically make every privately owned multifamily dwelling unit an “ADA unit.”
The project team should identify whether the facility or specific spaces are covered by ADA Title II or Title III requirements, and whether residential-facility provisions apply. Public-facing areas, leasing or management spaces, common-use facilities, and certain residential settings may need separate analysis. The U.S. Access Board also notes that residential facilities can be subject to other federal laws, including the Fair Housing Act and Section 504.
When ADA requirements do apply to a shower, the exact shower type, dimensions, clearances, controls, grab bars, seat, and threshold criteria come from the applicable sections of the standards. The U.S. Access Board’s ADA Standards resource is a useful primary reference. Do not use an “ADA” product label as a substitute for reviewing those details and the project scoping.
ICC A117.1, historically referred to as ANSI A117.1, provides technical criteria for accessible and usable buildings and facilities. ICC explains that the standard itself supplies technical criteria, while scoping is supplied by the code or authority that adopts it. It does not, by itself, decide how many Type A or Type B units a project must provide.
In the 2017 ICC A117.1 standard, Type B criteria are described as intended to be consistent with HUD Fair Housing accessibility guidance and to supplement, not replace, Accessible or Type A units. Type A units provide a higher level of accessibility and adaptability than Type B units.
Edition control matters. ICC A117.1-2026 is now available, while many jurisdictions and existing project documents may still reference earlier editions. EverFab model submittals for some Type B/FHA products currently cite ICC A117.1-2017. That documentation is useful for evaluating a model, but the project team still needs to confirm which edition the adopted code or other governing requirement calls for.
The Fair Housing Act’s design-and-construction requirements apply to covered multifamily dwellings designed and constructed for first occupancy after March 13, 1991. HUD’s technical overview describes covered multifamily dwellings as buildings with four or more dwelling units where all units are covered in buildings with one or more elevators, while ground-floor units are covered in other buildings with four or more units.
For covered units, the federal requirements include an accessible route into and through the dwelling, accessible locations for certain environmental controls, reinforcement in bathroom walls so grab bars can be installed later, and usable kitchens and bathrooms that allow a person using a wheelchair to maneuver.
FHA compliance also has a separate safe-harbor concept. HUD’s 2020 final rule added ICC A117.1-2009 and the 2009, 2012, 2015, and 2018 International Building Code editions to HUD’s recognized safe-harbor set. A newer A117.1 edition is not automatically a HUD-recognized FHA safe harbor simply because it is newer. The project team should confirm the compliance path it is relying on rather than collapsing “Type B,” “FHA,” and “current A117.1” into one label.
For a multifamily project, one of the most useful early deliverables is a matrix that identifies the requirement for each relevant unit or space. The matrix should be coordinated among the architect, owner or developer, accessibility consultant if used, and other responsible design professionals.
At minimum, record the building or unit type, governing federal requirement if any, adopted building code and accessibility standard edition, required unit classification, bathroom type, and the team member responsible for confirming compliance. If the project has multiple buildings, phases, funding sources, or jurisdictions, do not assume one row covers them all.
This step prevents a product-selection shortcut from becoming a specification problem. A shower model can support the selected path only after the project team has established what that path is.
Once the applicable requirement and unit type are known, evaluate the shower configuration. Depending on the project, that may mean a roll-in shower, transfer shower, adaptable shower, tub-shower, or another documented configuration.
The specification should account for the details that affect the installed condition: interior and exterior dimensions, entry or threshold, required clear floor space, seat and grab-bar plan, controls, drain location, reinforcement, accessories, surrounding construction, and installation requirements. The governing standard may also distinguish between what must be installed at turnover and what may be accommodated through reinforcement or adaptability.
EverFab’s ANSI Type B & FHA product page provides a focused starting point for products organized around that application. The site also publishes model submittals, BIM/Revit resources, and product filters by accessibility code. Use those resources to evaluate a specific model against the project criteria rather than relying on category language alone.
A specification should resolve two different questions: what the project requires and what the selected product documents. Keep those questions separate until they line up.
For each proposed shower model, review the current submittal for the dimensions, threshold configuration, materials, reinforcement, accessories, installation details, listed certifications, and accessibility categories actually documented. Current EverFab Type B/FHA submittals for selected models identify model-specific reinforcement and accessibility references, but those statements should stay tied to the documented model and configuration.
BIM/Revit files can support design coordination, but they should not become the only technical source in the specification workflow. Cross-check the BIM object, submittal, accessory selection, and construction documents before release.
Before the shower is specified or released, the project team should be able to answer the following questions.
Accessible shower planning is easier when the project team separates scoping from product selection. Identify the governing requirement, confirm the adopted edition and unit type, then use the selected model’s current documentation to close the loop.
For multifamily projects evaluating Type B or FHA-oriented configurations, review EverFab’s ANSI Type B & FHA product options and current submittals. If the project team needs help narrowing the product set or locating model documentation, Specify a Product or Contact Us to continue the conversation.
No. ADA applicability depends on the facility, ownership or operation, use of the space, and other project facts. Multifamily housing may also be subject to the Fair Housing Act, Section 504, adopted building codes, and state or local accessibility rules. Determine the governing requirements before assigning an ADA shower category.
No. Type A and Type B are dwelling- or sleeping-unit criteria in ICC A117.1, a technical accessibility standard. ADA requirements come from federal law and the 2010 ADA Standards. An adopted code may reference ICC A117.1, but the labels are not interchangeable.
Do not treat the labels as automatic equivalents. ICC A117.1 states that Type B criteria are intended to be consistent with HUD Fair Housing accessibility guidance, but FHA compliance depends on the project’s coverage and compliance path. HUD recognizes specific safe harbors, and the project team should confirm which one it is using.
Use the edition required by the adopted building code or other governing authority for the project. ICC A117.1-2026 is available, but a jurisdiction may still enforce an earlier edition. Product documentation may also cite a particular edition, so confirm both the project requirement and the model documentation.
Verify the model and configuration, dimensions, entry or threshold, reinforcement, seat and grab-bar conditions, controls, drain, accessories, installation details, and the specific accessibility categories or standards documented for that model. Then compare those details with the project’s scoped requirements.