Trends in Professional Liability Claims Against Architects, Engineers and Design Firms

Architects, engineers, and design professionals face an increasingly complex risk environment. While technical mistakes have always been a source of professional liability claims, today’s disputes are being driven by larger projects, more sophisticated project delivery methods, rising legal costs, and heightened client expectations.

Understanding the most common claim trends can help design firms strengthen risk management practices and better protect their businesses.

Rising Claim Costs Are Increasing Financial Exposure

One of the biggest trends affecting professional liability claims is the rising cost of resolving disputes.

Construction inflation, higher labour costs, increasing legal fees, and more complex litigation have all contributed to larger settlements and defence expenses. Even relatively minor allegations can become expensive when expert witnesses, technical investigations, and lengthy legal proceedings are involved.

As a result, firms should regularly review whether their professional liability insurance limits remain appropriate for the projects they undertake.

Contract Problems Continue to Drive Claims

Many professional liability disputes begin long before work starts. Poorly drafted contracts, unrealistic obligations, and unclear project responsibilities can significantly increase a firm’s exposure.

Common contract issues include:

• Broad indemnification clauses
• Duty-to-defend obligations
• Guarantees or warranties of project outcomes
• Undefined project scopes
• Ambiguous responsibilities among consultants
• Missing limitations of liability

Design professionals should carefully review contracts before signing and avoid accepting obligations that extend beyond the normal professional standard of care.

Scope Creep Creates Hidden Liability

Clients often request additional services or expanded deliverables throughout a project. When those changes are not documented through formal contract amendments, firms may unknowingly assume responsibilities for work that was never properly scoped or compensated. Maintaining written records of project changes, client approvals, and revised deliverables can help reduce misunderstandings and future claims.

Design Coordination and BIM Risks Are Growing

As project teams become more integrated, coordination failures are becoming a common source of claims.

Building Information Modeling (BIM), digital collaboration platforms, and multi-discipline project delivery methods improve efficiency but also create new liability exposures when:

• Design conflicts are overlooked
• Model information is inaccurate
• Responsibilities are unclear
• Changes are not communicated effectively

Effective quality control procedures and clearly defined responsibilities remain essential.

Larger and More Complex Projects Increase Risk

Today’s projects often involve sophisticated building systems, sustainability requirements, energy performance objectives, and specialized construction techniques. As project values increase, the financial consequences of an alleged design error increase as well. Even a relatively small omission can lead to significant costs if construction must be delayed, redesigned, or corrected.

Residential and Condominium Projects Remain High Risk

Residential and condominium developments continue to generate significant professional liability activity.

These projects frequently involve:

• Building envelope disputes
• Water intrusion allegations
• Construction defect claims
• Occupant-related complaints
• Long-tail litigation that emerges years after project completion
  

Firms involved in residential projects should ensure their risk management practices and insurance coverage are aligned with these exposures.

Artificial Intelligence Creates New Questions

Artificial intelligence is becoming increasingly common in design workflows. While AI tools can improve productivity, they do not eliminate professional responsibility.

Architects and engineers remain accountable for:

• Reviewing design outputs
• Verifying calculations
• Confirming code compliance
• Ensuring professional judgment is applied

As AI adoption grows, insurers are paying closer attention to how firms govern and supervise its use.

Common Professional Liability Claims

Some of the most frequent allegations against architects, engineers, and design firms include:

• Design errors and omissions
• Coordination failures
• Inadequate site investigations
• Specification errors
• Building code compliance issues
• Construction administration disputes
• Cost overruns linked to professional advice
• Project delays
• Structural deficiencies
• Contract interpretation disputes

Importantly, claims can arise even when no error actually occurred. Allegations alone can result in significant defence costs.

How Design Firms Can Reduce Professional Liability Exposure

Strong risk management practices remain the best defence against professional liability claims. Design firms can reduce their exposure by carefully reviewing contracts before signing, ensuring project scopes are clearly defined, and maintaining thorough documentation of client communications throughout the life of a project.

Establishing formal change management procedures can help prevent misunderstandings when project requirements evolve, while robust quality assurance and quality control processes can identify potential issues before they lead to costly disputes.

Firms should also carefully manage their relationships with subconsultants, invest in ongoing staff training, and regularly review their professional liability insurance limits to ensure coverage remains aligned with the size, complexity, and risk profile of their projects.

Protecting Your Firm’s Future

Professional liability claims continue to evolve as projects become larger, more complex, and increasingly technology-driven.

The firms best positioned for success are those that combine strong risk management practices with professional liability coverage specifically designed for architects, engineers, and design professionals.

An experienced insurance advisor can help ensure your firm’s coverage keeps pace with changing industry risks and contractual requirements.

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