Subsidence Risk and Legal Exposure for Engineers in Coastal Florida
July 14, 2026
By: Erin Weinstock | Originally published in CLM's Construction Claims Magazine
A recent publication on long-term subsidence patterns may shift the risk profile for design professionals working in coastal regions, particularly in coastal settings like Miami. Written by researchers at the University of Miami and published in Earth and Space Science, the publication documented that subsidence could continue for more than eight years after construction completion. Moreover, it may affect properties up to 300 meters away from construction sites. This liability timeframe is well beyond what most engineers in South Florida have structured their risk management strategies around.
This article analyzes the practical implications stemming from the research on long-term subsidence and offers guidance for developers, contractors, and engineers seeking to protect themselves professionally and legally in this potentially expanding liability landscape. These implications could extend far beyond technical construction and/or design considerations and may enter critical legal territory.
Common Practice for Protecting Public, Adjacent Properties
While the Florida building code does not pre-scribe specific procedures for protecting adjacent properties, it includes general language requiring that neighboring structures and the public be safeguarded during construction. Per the authors' interpretation, this building code directive can be met by identifying the risks posed by construction before putting shovels in the ground.
The most important step takes place during the preconstruction stage. This involves conducting detailed preconstruction condition surveys to establish the baseline condition of the neighboring properties before construction begins. Monitor¬ing plans and protocols are then implemented based on (1) the findings from the preconstruction surveys, and (2) the evaluation of the anticipated construction's means and methods.
Building monitoring generally relies on technologies like vibration sensors, crack gauges, and/or elevation surveys to track changes through-out the construction process, reflecting growing recognition that adjacent property risk is central to responsible project delivery.
Long-Term Subsidence and Design Implications
The above-mentioned research highlights critical implications for construction projects due to potential long-term subsidence, which may impact legal liabilities. This underscores the need for design and construction teams to anticipate delayed ground movement that could affect adjacent properties through foundation shifts, cracking, or structural instability. The impact radius of such subsidence can extend 200-300 meters from the construction site, influencing nearby buildings, roads, and infrastructure. To mitigate future claims due to subsidence, thorough preconstruction surveys and documentation of baseline conditions become even more essential than they are currently.
Continuous monitoring during and after construction, along with soil-structure interaction models that adapt to real-time data, may be new critical components of responsible design and/or construction administration.
Insurance and Legal Risk Management Strategies
The extended timeline of subsidence affects both insurance and legal professionals. Carriers should revise underwriting guidelines to account for expanded spatial and temporal dimensions of risk, including proximity-based factors for properties within the impact zone.
Legal counsel should engage proactively during project planning rather than reactively after claims arise. Attorneys can help structure agreements that anticipate the extended timeline of subsidence risks, including specialized provisions addressing liability allocation and monitoring obligations extending beyond project completion.
For defense counsel handling subsidence claims, causation will likely be the central challenge. The extended timeframe between construction and damage manifestation complicates traditional analysis. Legal teams will need expert analysis to address complex causation issues.
Policy language will also require careful review, with legal teams helping underwriters craft specific subsidence endorsements addressing extended liability timeframes. For ongoing risk management, enhanced monitoring protocols may become conditions of coverage.
Third-Party Exposure and Risk Management Strategies
Construction projects can create legal exposure beyond contractual relationships to all property owners within the subsidence impact radius. Third-party claims may be supported by evolving legal theories, making it essential for design and construction teams to proactively manage this risk. One effective strategy is to establish license agreements with neighboring property owners before construction begins. These agreements should outline protective measures for adjacent structures and specify the types of repairs neighbors are entitled to in the event of damage.
Evolving Standards of Care and Professional Expectations
The standard practice for design engineers and contractors when it comes to protecting adjacent properties from damage due to construction is currently not well defined. Building codes are generally performance-based and not prescriptive in this regard. This ambiguity often leaves professionals operating in a gray area.
The subsidence research findings also affect the professional expectations for design engineers. Courts may consider research literature as part of the minimum competency standard, requiring engineers to stay informed through industry publications and academic research. This shift could redefine what constitutes "reasonable" foreseeability, expanding the scope of risk that engineers are expected to anticipate.
Within the judicial framework for evaluating negligence, failure to address long-term subsidence (whether by omitting warnings to clients or neglecting to design for foreseeable ground movement) may be interpreted as a breach of the standard of care. Expert witness testimony may also need to adapt to this new context, reinforcing the idea that the definition of a "reasonable engineer" includes awareness of academic research publications.
Duty to Warn and Documentation Protocols
Failure to adequately warn stakeholders of known risks, even if based on published literature, such as the risk of long-term subsidence, may expose engineers to additional liability. To mitigate this, future risks of damaging neighboring properties may need to be communicated and documented before construction begins, with geotechnical reports serving as a primary vehicle for diclosure. Formal client communication protocols would be essential, with geotechnical and survey reports used to convey anticipated risks and license agreements outlining specific protective measures and repair entitlements.
Statutes of Limitations and the Discovery Rule
Long-term subsidence, if verified, would reshape how statutes of limitations are applied in construction-defect cases. Florida's traditional seven-year statute of repose may no longer offer reliable pro-tection, as delayed damage could trigger liability well beyond that window. Under the "discovery rule the clock on claims may begin when damage is first identified, even decades after project completion. To manage this uncertainty, design and construction teams should maintain thorough documentation beyond the standard timeframe and use license agreements to clarify discovery-related obligations and protections.
Long-term subsidence, particularly in coastal regions like South Florida, demands a fundamental shift in how engineers assess, manage, and defend against liability. Traditional assumptions about the duration and scope of risk would no longer be sufficient. As courts and clients increasingly expect engineers to anticipate and respond to geological realities, the expectations from the design professionals and the general contractors would need to be redefined. In this new landscape, proactive risk management is essential.
This Insight originally ran in the Summer 2026 issue of CLM’s Construction Claims magazine.
Questions?
Contact GrayRobinson Senior Associate Erin Weinstock or a member of the Construction Team.