When a large, complex construction project gets underway, the question of professional liability insurance is rarely simple. A sprawling hospital campus, a multi-use urban development, or a major public infrastructure project can involve dozens of design professionals working across interconnected scopes. One error anywhere in that chain can cascade into significant losses, and the question of who pays, whose policy responds, and how quickly the project can recover becomes critically important.
That’s where project-specific professional liability insurance comes in. For owners and design professionals navigating high-stakes projects, understanding the options and their tradeoffs is not optional.
Why Practice Policies Alone May Not Be Enough
Most architects and engineering firms carry what’s known as a “practice” professional liability policy. This is their standard errors and omissions (E&O) coverage, renewed annually and designed to protect the firm across all of its work. For everyday projects, this coverage is often sufficient.
But large, complex projects introduce a different level of risk. Consider what the National Society of Professional Engineers (NSPE) has noted about the limitations of relying solely on practice policies in a multi-firm project environment: when a design error occurs, liability must be sorted out among multiple carriers before a resolution is reached. That process takes time, and during that time, the project owner may need to continue funding the project out of pocket to keep work moving.
Practice policies are also claims-made and renewed annually, which means their terms and conditions can change from year to year. A policy that’s in place at the start of a five-year project may look quite different at renewal, adding uncertainty for everyone involved.
Beyond those dynamics, the ACEC data reflects an important gap in the market: the average per-claim professional liability limit purchased by engineering firms has historically hovered around $2.6 million. For a project with a construction value of $50 million or more, that kind of limit can fall well short of the exposure at stake.
The Three Options Project Owners Face
When it comes to professional liability coverage for a specific project, owners typically face three paths.
Option 1: Require Higher Limits from the Design Team
The most common approach is for the project owner to require each design firm to carry higher limits than they would otherwise maintain. Often this means requiring the prime architect and all professional subconsultants to increase their limits on a project-specific basis.
This approach feels straightforward, but it comes with real drawbacks. Each design firm bears the cost of that limit increase, and those costs get passed along to the owner through fees. More importantly, each firm’s practice policy responds only to that firm’s liability. When a claim arises, multiple insurers may be involved, each defending their own insured. The result is what the industry often calls a “finger-pointing” environment: carriers disputing allocation of fault while the project stalls and the owner waits.
Option 2: Owners Protective Professional Indemnity (OPPI)
An Owners Protective Professional Indemnity policy is structured differently. Rather than sitting primary to a design firm’s practice coverage, it functions as an excess layer. The owner purchases the policy, but it only responds after the responsible design firm’s practice policy has been exhausted up to a specified minimum insured retention (MIR), typically $1 million, and after the OPPI’s own self-insured retention (SIR) has been met, commonly $500,000.
OPPI gives the owner more direct control over the coverage on their project, and it avoids disturbing the design team’s practice policies. However, one important limitation deserves attention: if the owner’s contract with a design firm includes a limitation of liability clause, the OPPI policy may only respond up to the amount the owner is legally entitled to recover from that firm. If the limitation of liability has already been paid out by the practice insurer, the OPPI may not respond at all unless the policy is specifically amended to account for this scenario. This is a detail that requires careful attention in the policy language.
Like Option 1, OPPI still leaves the fundamental multi-carrier dynamic intact. If a claim arises, the owner is still dealing with the design team’s individual practice insurers as a first step.
Option 3: Project-Specific Professional Liability (PSPL)
A project-specific professional liability policy covers the entire design team under a single policy written expressly for the project. Limits typically range from $3 million to $25 million or more, depending on project scale, and coverage is primary rather than excess.
This is the most comprehensive approach, and for large, complex projects, often the most practical one. Here is why.
The Case for Project-Specific Coverage
Project-specific professional liability insurance addresses many of the limitations inherent in the other approaches.
Dedicated limits. Because the policy is written for a single project, its limits are not shared with or eroded by claims arising from any other work the design firms are doing. The NSPE has highlighted this as a significant comfort for project owners, particularly because practice policy limits can be reduced by unrelated claims from entirely separate projects.
Consistent terms throughout the project. The policy’s terms and conditions are set at inception and remain stable for the project’s duration, which may span several years from design through substantial completion. Owners don’t face the uncertainty of annual renewals changing the coverage picture mid-project.
A joint-defense provision. With all named design team members under one policy, a mandatory joint-defense framework replaces the multi-carrier finger-pointing dynamic. All insureds are obligated to cooperate in the defense and resolution of claims. This tends to produce faster resolutions, which matters enormously when a project is mid-construction, and delays carry direct financial consequences.
An extended reporting period. Once substantial completion is reached, project-specific policies typically include an extended reporting period of three to five years, ensuring that latent design errors discovered after construction wraps up are still covered.
Limits availability regardless of firm continuity. If a member of the design team is acquired, merges, or ceases operations during or after the project, the project policy’s limits remain available. That is not guaranteed under individual practice policies.
Simpler path to recovery for the owner. When a claim arises, the owner is negotiating with a single insurer rather than multiple practice-policy carriers. The NSPE has noted that legal fees in pursuing restitution can be substantially lower under this structure.
When Should a Project-Specific Policy Be Considered?
Project-specific coverage is not the right fit for every project, and it comes with high costs. For large projects, premiums can represent a significant percentage of the total limit purchased.
That said, IRMI (International Risk Management Institute) identifies several factors that point toward project-specific coverage as the appropriate choice: large construction values (particularly projects over $25 million), design complexity, accelerated schedules, non-traditional delivery methods such as design-build, environmental exposures, and heightened contractual risk.
Trends in the market reinforce this guidance. The NSPE’s most recent professional liability carrier survey noted that owners are increasingly requesting limits of $5 million to $10 million or more for complex projects, and that excess layers are becoming more common as construction inflation raises the financial stakes of errors. The survey also observed a rise in claims emerging from aggressive design-build environments, underscoring why project-level coverage is a meaningful risk management tool rather than simply a contractual formality.
The Value of Working with a Specialist
Project insurance is among the most nuanced and individually structured products in the professional liability market. Very few insurers write it, and those that do approach each project as a unique underwriting exercise. Coverage must be tailored to the project scope, delivery method, design team composition, and the owner’s specific risk management goals.
For the retail brokers who serve design professionals and project owners, accessing this market and navigating the structural choices between OPPI and project-specific coverage requires a wholesale partner with direct experience in this space. The differences between policy structures can have significant consequences in a claim, and those differences are not always apparent until they matter most.
If you’re working on behalf of a client with an upcoming large-scale project and need guidance on which approach makes sense for their situation, give us a call. Our team has decades of experience placing project-specific and owners protective coverage for design professionals, and we’re glad to help you find the right structure before the first shovel hits the ground.
About PDI
PDI is an Indianapolis-based wholesale brokerage firm with a national network that includes thousands of insurance agents, brokers, architects, engineers and contractors in all 50 states. Since PDI’s beginning in 1980, we’ve handled a single line of coverage: errors & omissions (E&O) for design professionals. Contact Us today for a review of your design client’s insurance program.