Historic Buildings and Accessibility: Finding the Right Balance

Historic preservation and accessibility are sometimes described as competing objectives. In practice, successful projects treat them as parts of the same architectural challenge: preserving the features that communicate a building’s history while giving people with disabilities independent and meaningful access.

Historic status does not create a blanket exemption from the Americans with Disabilities Act. Qualified historic properties may use certain alternative provisions, but only when the appropriate preservation authority determines that ordinary compliance would threaten or destroy the property’s historic significance.

The goal is not minimal compliance. It is the highest level of accessibility that can be achieved without unnecessarily sacrificing significant materials, spaces, and architectural relationships.

What Is a Qualified Historic Building?

Under the 2010 ADA Standards, a qualified historic building or facility is one that:

• Is listed in the National Register of Historic Places;
• Is eligible for National Register listing; or
• Is designated historic under an appropriate state or local law.

Age alone is not enough. A building can be old without being legally qualified for the special historic provisions. Conversely, a property may qualify because it is eligible for the National Register even if it has not been formally listed. See the definitions in the 2010 ADA Standards.

Historic Buildings Are Not Exempt From Accessibility

For private-sector facilities, alterations to eligible or designated historic properties must comply with ADA requirements to the maximum extent feasible.

If physical access cannot be provided to a historic place of public accommodation without threatening or destroying its historic significance, alternative methods of providing access must be considered. See 28 C.F.R. §36.405.

The historic exception is:

• Not automatic
• Not based only on cost
• Not available because a modification is visually noticeable
• Not a waiver of every accessibility requirement
• Limited to the element creating the historic conflict

Where no conflict exists, ordinary accessibility requirements continue to apply.

What Does “Threaten or Destroy Historic Significance” Mean?

The standard concerns the features that make the property historically important.

Potential examples include:

• Removing a monumental staircase central to the design
• Destroying original masonry to widen a significant entrance
• Cutting an elevator shaft through an important sequence of rooms
• Removing a character-defining porch, arcade, or courtyard
• Eliminating significant doors, millwork, finishes, or ornament
• Irreversibly changing an unusually intact historic floor plan

Not every change to historic fabric reaches this threshold. Later additions, previously modified areas, secondary elevations, service spaces, and utilitarian rooms may offer opportunities for accessibility improvements with limited impact.

The National Park Service recommends:

1. Reviewing the property’s significance and character-defining features
2. Assessing existing barriers and the required level of accessibility
3. Evaluating solutions within a preservation context

New accessibility features should be compatible, appropriately scaled, and reversible where possible. See National Park Service Preservation Brief 32.

The ADA’s Limited Historic Alternatives

When the required preservation determination has been made, special provisions may apply to accessible routes, entrances, vertical circulation, and toilet facilities.

Site Arrival Routes

The ordinary Standards can require routes from accessible parking, loading zones, public sidewalks, streets, and transit stops.

When the qualified-historic exception applies, no more than one accessible route from a site arrival point to an accessible entrance is required.

Possible solutions include:

• Regrading an existing walkway
• Resetting historic pavers over a stable base
• Introducing a gently sloped route
• Locating a ramp behind significant landscape features
• Using compatible but distinguishable paving materials

Entrances

Whenever feasible, access should be provided through a primary public entrance.

When that would threaten or destroy significant features, another public entrance may be used. If no public entrance can comply under the historic criteria, the Standards permit:

• An accessible, unlocked nonpublic entrance; or
• An accessible locked entrance with notification or remote monitoring.

The entrance must be easy to locate and reliably available whenever the building is open. A freight or service route beside refuse, storage, or loading operations rarely creates an equitable visitor experience.

The ADA Standards expressly allow one accessible public entrance under the qualified-historic exception. See ADA Standards §206.4.

Access Between Stories

Where the authorized historic exception applies, an accessible route may not be required to stories above or below the accessible story.

That does not mean the inaccessible floors can simply be ignored. Important programs, exhibits, merchandise, services, or meeting opportunities may need to be relocated or duplicated on the accessible level.

Toilet Facilities

When the historic exception applies, the project may provide:

• At least one accessible toilet room for each sex; or
• One accessible single-user restroom.

This can avoid destructively enlarging every historic restroom while still providing a compliant facility on an accessible route.

Accessibility Solutions That Preserve Historic Character

Regrading

A modest level change can sometimes be overcome by adjusting a walkway or landscape rather than attaching a prominent ramp.

This approach must consider drainage, foundation exposure, original stairs, planting beds, walls, and archaeological resources.

Integrated Ramps

A permanent ramp can be incorporated into:

• A landscape edge
• A retaining wall
• A porch
• A side courtyard
• A less-significant elevation
• A compatible new addition

The ramp should not obscure major architectural features or create an unnecessarily segregated entrance.

Platform Lifts

A platform lift may require less space than a ramp, but its use is restricted by applicable accessibility and building codes.

Project teams must consider:

• Whether the lift is permitted in that location
• Foundation and structural requirements
• Weather protection
• Gates and landing clearances
• Power and emergency operation
• Maintenance
• Independent use
• Visual impact

Compatible Additions

A carefully designed addition can accommodate:

• An accessible entrance
• An elevator
• Restrooms
• Vertical circulation
• Building services

The addition should be compatible with the historic building while remaining distinguishable as new work.

Retaining Historic Doors

A significant door may be improved through:

• Automatic operators
• Adjusted closing force
• Accessible hardware
• Offset hinges
• Threshold modification
• Changes to the approach or landing

Replacing the door or widening its frame should not be the first assumption.

Using Less-Significant Interior Areas

Elevators, lifts, and accessible restrooms can often be placed in later additions, altered rooms, secondary circulation areas, or service spaces.

This requires a clear understanding of which spaces and materials actually contribute to the property’s significance.

Accessibility Is More Than Wheelchair Access

A preservation project should also address people with visual, hearing, cognitive, and other disabilities.

Potential improvements include:

• Tactile and Braille signage
• High-contrast wayfinding
• Visual fire alarms
• Assistive-listening systems
• Captioned interpretive media
• Audio description
• Accessible websites and ticketing
• Improved lighting
• Seating and rest areas
• Clear, predictable circulation

Many communication improvements can be introduced with little effect on historic fabric.

Alternative Programs Are a Last Resort

When a portion of a historic building genuinely cannot be made physically accessible without destroying its significance, alternative access may include:

• Audiovisual tours
• Virtual interpretation
• Replicated exhibits
• Relocated services
• Accessible models
• Staff assistance
• Programs offered in an accessible room

For government-operated historic preservation programs, federal regulations require priority to be given to methods providing physical access. Alternatives are appropriate where structural access would threaten historic significance, fundamentally alter the program, or create an undue financial and administrative burden. See 28 C.F.R. §35.150.

A virtual tour should supplement—not casually replace—physical access that can reasonably be provided.

When Section 106 Applies

Section 106 of the National Historic Preservation Act may apply when a federal agency carries out, funds, licenses, permits, or approves a project affecting historic properties.

The process requires the federal agency to:

1. Establish whether the project is a federal undertaking
2. Identify historic properties
3. Assess potential effects
4. Consult to resolve adverse effects

Section 106 encourages—but does not require—a preservation outcome. Possible results include avoidance, minimization, mitigation, or acceptance of adverse effects. See the Advisory Council on Historic Preservation’s applicant toolkit.

Section 106 and accessibility review are separate obligations. One should not be used to bypass the other.

Historic and Landmark Projects in New York City

New York City landmarks and properties within historic districts are subject to Landmarks Preservation Commission review in addition to Department of Buildings approval.

Depending on the scope, LPC authorization may take the form of:

• A Certificate of No Effect
• A Permit for Minor Work
• A Certificate of Appropriateness

Accessibility improvements affecting protected features may require photographs, existing-condition drawings, proposed plans, details, material information, and a clear explanation of why the solution is appropriate.

Parkbench’s NYC landmarks process guide explains how landmark review and DOB filing fit together.

Parkbench’s work at % Arabica at 30 Rockefeller Plaza demonstrates how contemporary commercial infrastructure and design can be introduced within an iconic architectural setting.

A Recommended Design and Approval Process

1. Confirm Historic Status

Determine whether the property is:

• Individually designated
• Inside a historic district
• Listed or eligible for the National Register
• Subject to an easement, covenant, grant, or tax-credit agreement

2. Identify Character-Defining Features

Review designation reports, nomination forms, historic photographs, prior alterations, and physical evidence.

3. Survey Accessibility

Follow the complete user experience:

1. Arrival and parking
2. Exterior route
3. Entrance
4. Interior circulation
5. Vertical access
6. Public rooms and service areas
7. Restrooms
8. Signage and communication
9. Emergency systems
10. Programs and exhibits

4. Develop Multiple Options

For each barrier, compare:

• Full compliant solution
• Preservation effect
• Lower-impact alternatives
• Technical feasibility
• User independence
• Maintenance
• Construction cost
• Approval requirements

5. Consult Early

Engage the building department, preservation authority, accessibility specialists, and other reviewing agencies before the solution is fixed.

6. Document the Decision

If a historic exception is pursued, document:

• The property’s qualified status
• The significant feature at risk
• The ordinary requirement
• Options evaluated
• The anticipated historic harm
• The required determination
• The selected alternative

7. Verify Construction and Operations

Check completed slopes, door clearances, controls, routes, signs, restrooms, and equipment. Ensure that accessible entrances and lifts remain operational and available.

Common Mistakes

Treating Historic Status as a Blanket Exemption

The special provisions are limited and generally require a formal determination.

Using Cost as the Historic Justification

Expense alone does not establish that compliance would threaten historic significance.

Hiding the Accessible Entrance

An alternate entrance must be visible, dignified, reliable, and connected to the building’s public functions.

Waiting Until Permit Review

Late coordination can require redesign and produce inferior preservation and accessibility outcomes.

Assuming LPC Approval Establishes ADA Compliance

Landmark approval, building-code review, and federal accessibility compliance are distinct.

Relying Permanently on Portable Equipment

Portable ramps and staff-dependent devices often fail to provide safe, independent access.

Architecture Can Serve Both Goals

Accessibility and preservation are not mutually exclusive. Regrading, compatible additions, carefully integrated ramps, automatic operators, well-placed lifts, clear wayfinding, and thoughtful program planning can improve access without erasing architectural character.

Parkbench Architects provides architectural design, Architect of Record services, construction documents, filing and permitting, LPC support, code review, and construction administration. Learn more about Parkbench and its services, explore its project portfolio, or contact the studio to discuss a historic renovation.

This article provides general educational information and is not legal, preservation, architectural, engineering, or project-specific code advice.