Authored by: Rimkus Forensic Services Marketing Team
Published 5/15/2026
A commercial building develops widespread cracking along its exterior walls within two years of completion. The owner files a claim, the architect points to the contractor’s installation methods, the contractor argues the design specifications were inadequate, and the subcontractor cites material deficiencies outside anyone’s control.
Three parties, three theories, and a single question: did any party depart from the applicable construction standard of care? Answering that question often requires a forensic investigation, an evaluation of the professional norms that applied at the time and place of construction, and an expert who can explain those norms to a judge or jury.
The sections that follow examine how forensic investigators define the construction standard of care, how they assemble the supporting evidence, and how that evidence holds up under cross-examination in court.
Key takeaways: Construction standard of care basics
In construction defect disputes, accountability often turns on whether a professional met the standard of care. Understanding how that standard is defined, who it applies to, and how it is evaluated helps your team approach claims and litigation with a clearer view of the technical record.
What defines the standard
- The standard measures conduct against what a reasonably prudent professional would do in similar circumstances, in the same locality, and at the same time
- Code compliance is generally necessary, but often not sufficient on its own
- Contract clauses may expand obligations beyond common law duties and potentially create gaps in professional liability coverage
How forensic investigation supports your team
- Investigators reconstruct the codes, practices, and norms in effect when the work was performed
- Expert testimony is commonly used to establish the standard in U.S. jurisdictions
- Root cause analysis can address both the technical cause and whether conduct met professional norms
Rimkus provides forensic investigation support for construction disputes where the standard of care is in question. Contact us for more information.
What is the construction standard of care?
The construction standard of care measures a professional’s performance against what a reasonably prudent practitioner would do under similar circumstances, in the same locality, and at the same time. This local and temporal framing is sometimes referred to as the “locality rule,” and it is the reason the standard cannot be evaluated in the abstract.
The standard has historically been understood to require what a reasonably prudent professional would do under similar circumstances, not perfection and not hindsight. In practice, the definition has three working parts:
- A reasonably prudent professional as the benchmark, not a perfect one
- Similar circumstances, meaning the conditions and constraints the practitioner actually faced
- Same locality and time, meaning the standards and customs that applied where and when the work was performed
These three elements together determine which professional norms a court will weigh. The same design decision can fall within acceptable conduct in one jurisdiction and constitute a departure in another, depending on local codes, climatic conditions, and prevailing professional customs.
Standard of practice versus standard of care
These two terms are often used interchangeably, but in forensic and legal contexts they describe different things. The standard of practice generally refers to what professionals in a given field actually do: the methods, codes, and procedures commonly followed. The standard of care is the legal benchmark of what a reasonably prudent professional should have done under the circumstances.
The two can diverge. Industry practice may not always reflect the most current available knowledge, and conformity to common practice does not always satisfy what the law requires. For forensic investigators, this distinction means that documenting how a professional’s conduct compared to typical industry practice is only the first step. The second is evaluating whether that conduct met the standard of care a court would apply.
Who is held to the construction standard of care?
Several project participants may be evaluated under a standard of care analysis. The legal framework, however, differs by role.
Design professionals
When a Professional Engineer (PE) is sued for negligence, the plaintiff generally must establish that the PE breached a reasonableness standard, typically through expert testimony from another PE. Architects and engineers are commonly held to this negligence-based reasonableness standard, and professional bodies such as the National Society of Professional Engineers (NSPE) publish guidance that reflects this framework.
Contractors and subcontractors
Contractors are often evaluated based on workmanship obligations and the quality of the completed work, though the applicable legal framework may vary by jurisdiction, contract structure, and claim type.
Design-build entities
Design-build projects may raise distinct questions because design and construction responsibilities are combined. Some courts have treated design-build contracts more similarly to construction contracts, which means the design-builder may warrant the adequacy of professional services rather than being judged only on negligence.
In practice, this can complicate forensic analysis: the same entity that designed a system may also have installed it, and untangling whether a failure traces to design intent or construction execution often becomes a central evidentiary question.
How is the construction standard of care established?
The standard may draw from multiple interlocking sources:
- Codes and technical standards, which set the regulatory floor for the work
- Professional norms, including ethics codes and consensus documents that guide practice
- Contract terms, which may modify or expand the duties owed under common law
In forensic work, these sources are typically evaluated together rather than in isolation.
Codes and technical standards
Building codes, such as the International Building Code (IBC), form the regulatory floor. Codes are widely understood as minimum requirements rather than aspirational targets, and technical bodies such as the National Institute of Standards and Technology (NIST) publish research and guidance on building performance that often goes beyond code minimums. Code compliance is generally necessary but may not be sufficient to satisfy the standard of care.
Model codes incorporate consensus standards from organizations such as the American Society of Civil Engineers (ASCE), ASTM International, and the National Fire Protection Association (NFPA). For example, ASCE 7 prescribes minimum design loads for dead, live, seismic, wind, and other hazards.
Professional norms and custom
Professional ethics codes from NSPE, the American Institute of Architects (AIA), and ASCE impose obligations beyond technical compliance. In forensic analysis, the standard of care is typically informed by the specific consensus documents governing the original design, such as applicable codes, standards, and specifications, rather than by local custom alone.
Contractual modifications
The standard of care is generally rooted in common law negligence, though contracts may also define or inform the duties owed. A warranty or guarantee is framed as an assurance of a fact or outcome rather than a negligence inquiry.
When contract clauses reference a “highest standard of care” or warrant that design documents are “complete, accurate, and free of errors,” the insured may have accepted obligations that professional liability policies do not typically cover.
For claims professionals evaluating coverage, contract documents are often an early focus of coverage analysis, with attention to scope-of-services language, defined deliverables, and any warranties that go beyond customary professional duties.
How do geography and timing affect the standard?
Both location and timing are often built into the standard’s legal definition. In practice, that means investigators typically evaluate not only what was done, but also where and when the work occurred.
Geographic variation
States differ in how they adopt the International Code Council’s model codes, whether in full, with amendments, or through delegation to local governments. The standard of care a court applies generally reflects whichever version of the code, and whichever local amendments, were in effect when the work occurred.
Structural design requirements also vary by region. Seismic Design Categories in ASCE 7 may drive higher detailing demands in California, the Pacific Northwest, and parts of the Intermountain West, while ground snow load maps generally drive more conservative roof and structural framing decisions in northern states. A design that satisfies the standard of care in Houston may not satisfy it in San Francisco, which is the locality rule in practical operation.
Temporal dimension
Model codes are typically updated on a multi-year cycle, so a practice compliant under one edition may not satisfy a later one. Forensic investigators typically establish which edition governed at the time of permit issuance, since many jurisdictions apply the code in effect when the permit was filed rather than when construction was completed. For phased projects spanning multiple code cycles, investigators may need to determine which portions of the work fall under which edition.
Why is the standard of care central to forensic investigations?
Forensic construction defect investigations address both technical and legal questions. The goal is to develop an objective, evidence-based understanding of what occurred and whether the conduct at issue aligned with applicable professional norms.
Dual-purpose investigation structure
Forensic construction investigations often serve two purposes at once:
- Identifying the physical causes of a failure through site inspection, document review, material testing, and structural engineering analysis
- Evaluating whether the parties responsible performed within applicable professional norms
Both purposes inform the same investigative record. When a forensic engineer identifies a material deficiency or a deviation from the design documents, the next question is whether a reasonably prudent professional would have caught or prevented it under the circumstances that existed at the time. Root cause analysis may therefore inform both a technical finding and a standard of care evaluation. ASTM E2713-25 provides guidance commonly referenced in conducting these investigations, and many investigators also reference the ASCE Guidelines for Failure Investigation.
Expert testimony requirements
Expert testimony is commonly used to establish the construction standard of care in many U.S. jurisdictions. Courts generally recognize that jurors may lack the technical background to assess whether professional conduct met the applicable standard without hearing from a qualified practitioner.
Admissibility is often evaluated under the Federal Rules of Evidence (FRE), particularly Rule 702, and the Daubert and Kumho Tire decisions. Daubert v. Merrell Dow Pharmaceuticals, Inc. is commonly understood to direct courts to evaluate whether factors such as an expert’s methodology is testable, peer-reviewed, and generally accepted. Kumho Tire Co. v. Carmichael is widely understood to have extended this gatekeeping to engineers and other technical professionals. The 2023 amendments to FRE Rule 702 clarified the burden, requiring the proponent to demonstrate admissibility by a preponderance of the evidence.
Because the consequences of exclusion can be significant, the qualifications and methodology of the testifying expert often become central issues. In construction claims, qualified expert witness testimony from a forensic structural engineer, grounded in recognized investigation guidelines and ASTM reporting standards, may help connect the forensic record to an engineering opinion offered under applicable evidentiary standards.
Where does standard of care analysis begin?
The construction standard of care sits at the intersection of law, engineering, and professional custom. It is locality-specific, time-bound, and shaped by the contract the parties signed. The same factual record may produce different liability outcomes depending on which jurisdiction’s standard applies, which code edition governs, and what the contract documents required.
Evaluating the standard of care generally requires both technical depth and an understanding of the professional norms that applied when the work was performed. For attorneys, claims managers, and risk professionals involved in construction disputes, this analysis typically calls for qualified forensic investigation and expert testimony grounded in recognized methodology.
Organizations seeking forensic investigation support may contact Rimkus regarding a specific matter.
Frequently asked questions about the construction standard of care
Can a contractor or engineer follow standard practice and still fall below the standard of care?
Building codes and documented procedures are generally considered minimum requirements rather than the full extent of professional responsibility. In some situations, a reasonably prudent professional may be expected to recognize conditions requiring additional analysis, coordination, or protective measures beyond baseline requirements.
Can property owners be liable for construction standard of care issues?
Property owners may face liability depending on their role in the project, contractual responsibilities, and level of involvement in design or construction decisions. Liability questions often depend on project structure, delegation of responsibilities, and jurisdiction-specific law.
How do forensic engineers determine whether the standard of care was met?
Forensic engineers typically reconstruct the codes, professional norms, and contract requirements in effect when the work was performed, then compare the conduct at issue against what a reasonably prudent practitioner would have done in similar circumstances. This evaluation generally combines site inspection, document review, analysis of applicable codes and consensus standards, and comparison of the conduct at issue to what a reasonably prudent professional would likely have done under similar circumstances.
This article is intended to provide general information and insights into prevailing industry practices. It is not intended to constitute, and should not be relied upon as, legal, technical, or professional advice. The content does not replace consultation with a qualified expert or professional regarding the specific facts and circumstances of any particular matter.