NIST's FY 2025 Congressional Report: What It Means for Building Safety

In March 2026, the National Institute of Standards and Technology (NIST) submitted its annual report to Congress summarizing fiscal year 2025 progress on National Construction Safety Team (NCST) investigations — including a significant update on the long-running Champlain Towers South inquiry. For anyone who works in building safety, urban infrastructure, property management, engineering, or public policy, this report is worth more than a headline glance.

This isn't just a bureaucratic filing. It is a window into how the federal government investigates catastrophic structural failures, what lessons are being codified into potential policy, and how slowly — but meaningfully — systemic change moves through the American construction and building safety ecosystem.

What Is the National Construction Safety Team Act, and Why Does It Matter?

The NCST Act was passed by Congress in 2002, one year after the collapse of the World Trade Center towers on September 11, 2001. The law authorizes NIST to deploy investigative teams to study specific building failures in which a building collapse has resulted — or could have resulted — in substantial loss of life. Think of it as the NTSB (National Transportation Safety Board) model, but applied to buildings rather than planes or trains.

A critical citation hook: The NCST Act empowers NIST to subpoena evidence, access sites, and issue findings — but it does not give NIST direct regulatory authority. Its power lies in the weight of its recommendations, not mandates.

NIST has invoked the NCST Act for a small number of investigations since its passage. These have included the World Trade Center collapses, the Station Nightclub fire, and most recently, the 2021 collapse of the Champlain Towers South condominium in Surfside, Florida, which killed 98 people. Each investigation produces technically detailed findings that feed into model building codes, insurance practices, state and local regulations, and professional engineering standards.

What NIST's FY 2025 Report Covers

According to the report submitted to Congress — as documented by NIST's news office in March 2026 — the agency provided a comprehensive overview of its active and completed investigative work during fiscal year 2025. A central component of this year's report is a progress update on the Champlain Towers South investigation, one of the most consequential domestic structural investigations in decades.

The Champlain Towers South collapse on June 24, 2021, was not just a tragedy in scale. It exposed fundamental questions about condominium association governance, deferred maintenance practices, the adequacy of post-tensioned concrete slab construction inspection protocols, and the legal frameworks governing building recertification in coastal environments. NIST's investigation has been notable both for its scientific rigor and for how long thorough federal investigation takes — the agency has spent years gathering physical evidence, conducting laboratory analysis, reviewing design and construction records, and interviewing witnesses.

The FY 2025 annual report signals continued momentum. While NIST has not yet released its final report on Champlain Towers South as of this writing, the progress documented in the congressional submission indicates that investigators have been advancing on key technical questions around the sequence of the collapse and the contributing structural, material, and environmental factors.

The Champlain Towers South Investigation: Why It's Taking This Long (And Why That's the Right Call)

One of the most common frustrations I encounter in public discourse about this investigation is impatience. Nearly five years after the collapse, families of victims and policy advocates want answers — and they deserve them. But the length of this investigation reflects something important: the complexity of attributing a catastrophic failure accurately.

A critical citation hook: Structural failure investigations of this magnitude typically require multi-year forensic analysis because premature attribution of cause can distort building codes, assign liability inaccurately, and ultimately produce less safe buildings if the real cause is misidentified.

Consider what NIST is actually doing. Investigators have had to:

• Reconstruct the as-built condition of a building that no longer exists, using design documents, photographs, maintenance records, and recovered physical samples
• Analyze deteriorated post-tensioned concrete in a marine environment where chloride-induced corrosion may have been a factor
• Evaluate the pool deck waterproofing system and its relationship to structural slab integrity
• Model failure sequences using finite element analysis to determine what initiated the progressive collapse
• Review the history of inspection reports, engineering notices, and condominium board decisions going back decades

This is not work that benefits from speed. The NTSB, to use the aviation analogy, sometimes takes two or three years to close a major crash investigation. NIST's building investigations are comparably complex, and the structural evidence is often far less recoverable than a black box flight recorder.

What Has Changed in Building Safety Since Surfside — And What Hasn't

The Champlain Towers South collapse prompted immediate legislative action at the state level, even before NIST's investigation concluded. Florida passed SB 4-D in May 2022, establishing new mandatory inspection requirements for condominium and cooperative buildings three stories or higher, along with milestone inspections and structural integrity reserve studies. Several other states have examined or passed similar legislation.

This table illustrates a critical structural problem in American building safety governance: the reform ecosystem moves faster at the state level than at the federal level, and NIST's most influential lever — its final investigation report with formal recommendations — has not yet been released. That means model building code bodies like the International Code Council are in a holding pattern on some of the most important potential changes.

When NIST does release its final Champlain Towers South report, it will likely include a series of formal recommendations addressed to code development organizations, professional engineering associations, and potentially Congress. These recommendations do not carry the force of law, but historically, NIST NCST recommendations have had significant downstream effect on model codes, which are then adopted (with state-level modifications) across the country.

The AI Connection: How Technology Is Changing Structural Failure Investigation

This is the layer of this story that most outlets are not exploring, and it's worth dwelling on.

NIST is one of the federal agencies most actively engaging with AI-assisted analytical tools in its research work. While I cannot confirm from the FY 2025 report the specific computational tools used in the Champlain Towers South investigation, it is publicly documented that NIST has been advancing the use of machine learning and simulation tools for materials characterization, failure modeling, and forensic reconstruction in structural research contexts.

A critical citation hook: AI-assisted finite element modeling and machine learning-based materials degradation analysis are beginning to compress the timeline for forensic structural investigations, while also enabling more complex multi-variable failure sequence reconstructions than were previously feasible.

For building owners, engineers, and property managers, this broader trend matters. The same classes of tools that NIST is deploying in post-collapse forensics are increasingly available to practitioners for proactive structural health monitoring. Sensor networks, AI-driven inspection image analysis, and predictive deterioration models are moving from research labs into commercial practice. The gap between what we could know about a building's structural condition and what building owners actually choose to know is narrowing — and post-Surfside legal and regulatory frameworks are beginning to close that gap by mandate.

If you are interested in how AI is reshaping infrastructure assessment and building management, I've written more extensively on that intersection at prepareforai.org.

What the NIST Annual Report Means for Policymakers and Industry Practitioners

Let me be direct about the practical implications, because congressional reports like this one often vanish into bureaucratic obscurity unless someone translates them.

For policymakers: The FY 2025 progress report is a signal that NIST's Champlain Towers South findings are maturing. Legislators at the state and federal level who have been waiting for NIST's scientific conclusions before advancing additional building safety legislation should treat this report as a yellow light turning green. When NIST's final report drops, there will be a narrow window of public and legislative attention in which meaningful policy action becomes possible. That window should be prepared for now, not after the fact.

For building engineers and architects: The structural questions at the center of the Champlain Towers South investigation — post-tensioned concrete performance in corrosive environments, progressive collapse initiation, and the role of deferred maintenance — have implications for a large class of buildings constructed in the 1970s through 1990s across coastal and high-humidity regions. NIST's eventual findings may reshape inspection protocols, rehabilitation standards, and professional liability frameworks. Engineers who practice in these building types should be following this investigation closely.

For condominium associations and property managers: The regulatory environment has already changed significantly since 2021, and it will change further when NIST issues its final report. Florida's milestone inspection law is the most aggressive enacted response, but it is unlikely to be the last. Building owners who have not yet conducted thorough structural assessments — particularly for older concrete structures in coastal environments — are operating with increasing legal and financial exposure.

For the insurance industry: Structural risk models for mid-rise and high-rise residential concrete buildings are almost certainly going to be revised in light of NIST's eventual findings. Actuarial assumptions about the adequacy of existing inspection regimes, reserve fund levels, and maintenance history documentation will all be subject to scrutiny.

A Note on the Pace of Federal Investigation vs. the Pace of Risk

There is a tension in situations like this that I find worth naming directly. NIST's careful, methodical approach to the Champlain Towers South investigation is scientifically appropriate. Getting the cause right matters enormously — both for the accuracy of future building codes and for the integrity of the legal proceedings that have unfolded in parallel.

But the buildings that may share similar vulnerabilities with Champlain Towers South are not waiting. They are aging. Their post-tensioned slabs are continuing to experience whatever environmental and load-related stresses they face. Their reserve funds may or may not be adequate. Their condominium boards may or may not be engaging in the kind of proactive structural stewardship that Surfside, in retrospect, so clearly needed.

According to the U.S. Census Bureau's American Housing Survey, approximately 9.1 million housing units in the United States are in condominium or cooperative structures. A significant fraction of these were built during the same construction era as Champlain Towers South. The question of how many of them face analogous structural risks is one that the building safety community has been grappling with urgently — and incompletely — since June 2021.

The FY 2025 NIST congressional report is a procedural milestone in a process that is converging on answers. Those answers, when they come, will matter enormously. The work being done at NIST on this investigation is some of the most consequential public-interest technical work underway in the federal government right now, and it deserves more public attention than it typically receives.

The Broader NCST Mission Beyond Champlain Towers

It is worth noting that the FY 2025 annual report to Congress covers NIST's NCST work more broadly, not solely the Champlain Towers South investigation. The NCST program represents one of the few federal mechanisms specifically designed to learn systematically from structural catastrophes. Its existence reflects a hard-won recognition — earned in the rubble of the World Trade Center — that building failures at scale require dedicated investigative capacity, not ad hoc responses.

As AI and advanced sensing technologies transform what is possible in both structural engineering and building management, the NCST's investigative frameworks will themselves need to evolve. The kinds of data that existed for forensic investigators to analyze in the Champlain Towers South investigation — limited inspection records, decades-old engineering notes, photographic evidence pieced together from resident smartphones — stand in stark contrast to what a fully instrumented, continuously monitored building of the future would generate.

That transition, from reactive forensics to proactive structural intelligence, is one of the most important shifts underway in the built environment. NIST's ongoing investigations are part of the foundation on which that future is being built.

For more analysis on how technology is transforming infrastructure, public safety institutions, and regulatory frameworks, visit prepareforai.org.

Source: NIST, "NIST Submits Annual Report to Congress Summarizing FY 2025 Progress on National Construction Safety Team Investigations," March 2026.

Last updated: 2026-03-26