Construction defect engineer

Expert class library · Construction · Either side

Investigates building failures and defects to identify their cause and the work needed to repair them. Distinguishes design errors, construction errors, and maintenance issues.

Questions this testimony turns on

• Is the engineer qualified to give the specific opinion offered, such as repair cost, or only opinions on the existence and cause of the defects?
• What calculations, inspections, or measurements support the opinion that a design or installation choice caused the moisture, settlement, or other damage?
• Must the expert tie each defect to a particular contractor, or is a defect-by-defect list enough to go to the jury?
• Did the expert identify the contractual, code, or industry standards the work failed to meet, even without using the phrase "standard of care"?
• Can the expert rely on data gathered by other experts and on occupant reports rather than his own testing?

Methods

• Forensic site investigation
• Building code compliance review
• Destructive testing
• Repair scope and cost estimation

How the testimony is attacked

• Not qualified on repair costs. Defendants argue that an engineer who can identify structural defects is not thereby qualified to price the repairs. In The Inn By The Sea Homeowner's Association v. SeaInn the Mississippi Supreme Court affirmed a Daubert exclusion of the plaintiff's engineer on cost because his own report called the cost range a general estimate and said a more qualified person was needed.
• Conclusory cost estimates. Defendants attack lump-sum repair figures that cite a general cost manual without item-level calculations. The same Mississippi decision treated estimates for twenty-two of twenty-three items, supported only by a reference to an older cost manual, as lacking a disclosed basis.
• No independent testing. Defendants argue the engineer never measured humidity or confirmed the failure mechanism himself. In Marydale Preservation Associates v. Leon N. Weiner & Associates the Delaware Superior Court held that the absence of the expert's own testing went to cross-examination where he explained his load calculations and relied on data gathered by others.
• No articulated standard of care. Defendants argue the report never states the standard the builder breached. Marydale rejected this because the report, read as a whole, identified the contractual and industry standards that were not met, and Delaware law requires no magic words.
• Failure to allocate defects among contractors. Defendants argue a laundry list of defects leaves the jury to guess which contractor caused what. In Urban Concepts v. Gruber the Delaware Superior Court refused to exclude the homeowners' liability expert on that ground, noting the movants did not challenge his inspections, method, or qualifications.

What the public record shows

Courts have filed at least 4 opinions since 2015 that discuss this class of testimony and cite Daubert or Rule 702, as of October 2, 2026. Three that show how courts handle this class of testimony:

Each case links to the free opinion text on CourtListener.

Most of these rulings come from state courts, which apply their own evidence rules: many follow Daubert, some still apply Frye, and a few exempt certain testimony from a reliability hearing altogether. Check which standard governs in your court before relying on a ruling.

In federal court: amended Rule 702

In federal court, since December 1, 2023, Rule 702 says expressly that the party offering an expert must show the court it is more likely than not that the testimony meets each requirement: that it rests on sufficient facts or data, uses reliable methods, and reflects a reliable application of those methods to the case. Questions about the basis of an opinion are no longer automatically matters of weight for the jury. For how the circuits have applied the amendment, see the Rule 702 tracker, which follows each court of appeals; for what that means for preparing or attacking this class of expert, see the guide on amended Rule 702.

Related classes

• Property loss causation engineer

Guides

• Amended Rule 702 After Nearly Three Years: What Courts Exclude

Simulating this class on a matter

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Updated October 2, 2026. How this page is built: rulings are found by searching court opinions on CourtListener. The summaries are written by AI working from the full text of each opinion, and every citation and link is checked automatically. Outcomes are labelled by what the court did with the expert’s testimony. No individual expert is named. This page summarises public decisions for orientation and is not legal advice; read the opinion before relying on any ruling. Spotted an error? Tell us.