5 Common Causes of Public Works Construction Claims — and How to Prevent Them

Claims on public works construction projects are a fact of life. According to Arcadis's Global Construction Disputes Report, the average value of a construction dispute in North America exceeds $30 million, and the average time to resolution is over 15 months. While not every claim reaches that scale, even modest disputes on public projects carry outsized consequences — because public agencies have rigid budgets, formal change order processes, and zero appetite for cost overruns.

For subcontractors, understanding the most common causes of claims is the first step toward preventing them.

1. Ambiguous Scope Definitions

The single most common cause of claims on public works projects is disagreement over what's included in the contract scope. Plans and specifications on public projects are often prepared by design firms months or years before construction begins. By the time the job goes to bid, conditions may have changed, details may conflict between drawings and specs, and gaps between trades may not be clearly assigned.

When a subcontractor's proposal includes specific exclusions or assumptions and those terms aren't clearly incorporated into the award, the foundation for a scope dispute is laid.

Prevention: Structure every proposal with a clear, prominent scope section that lists inclusions, exclusions, and assumptions. Ensure the GC reviews and acknowledges these terms before award — not after work begins.

2. Differing Site Conditions

Public works projects — particularly infrastructure, utility, and roadway work — frequently encounter subsurface or existing conditions that differ from what the contract documents described. Unexpected soil conditions, undocumented utilities, contaminated materials, and structural deficiencies in existing facilities are all common triggers.

Most public works contracts include a "differing site conditions" clause (modeled on federal FAR 52.236-2), but exercising that clause requires timely written notice and thorough documentation. Subcontractors who don't follow the notice requirements to the letter often lose their right to recover, even when the changed condition is undeniable.

Prevention: Know your contract's notice requirements before work starts. Document conditions immediately upon discovery — photos, daily reports, and written notice to the GC within the contractual timeframe. Don't wait to see if the issue resolves itself.

3. Delayed or Defective Owner-Furnished Information

On public projects, subcontractors often depend on information that the owner or GC is responsible for providing: survey data, utility locates, RFI responses, submittal approvals, and design clarifications. When this information arrives late or contains errors, the downstream impact on the subcontractor can be severe — but proving the causal link between the delay and the damages requires meticulous recordkeeping.

Prevention: Track every information request with dates and follow up in writing. Maintain a log of RFIs, submittals, and pending owner decisions. When responses are late, send written notice documenting the delay and its anticipated impact on your schedule. This contemporaneous documentation is your strongest evidence if a claim becomes necessary.

4. Schedule Acceleration and Compression

Public projects frequently fall behind schedule — due to permitting delays, design changes, weather events, or other causes that aren't the subcontractor's fault. When the completion deadline remains fixed, the GC or owner may direct an accelerated schedule, requiring trades to work overtime, add crews, or compress their work sequences.

Acceleration claims are among the most difficult to prove because the direction to accelerate is often informal — a verbal instruction to "do whatever it takes to stay on schedule" rather than a written change order. Without documentation of the directive and the resulting costs, the subcontractor may absorb the acceleration expenses with no recovery.

Prevention: Never accelerate without written acknowledgment from the GC that the acceleration is directed and that the additional costs will be addressed. If the direction is verbal, confirm it in writing immediately: "Per our conversation today, you've directed us to add a second shift to maintain the project schedule. We will track the additional costs and submit them as a change order."

5. Improper or Incomplete Change Order Processing

Change orders on public works projects must follow specific procedures — written proposals, agency approval, executed documentation — before work begins. In practice, subcontractors are frequently told to proceed with changed work immediately, with the paperwork to follow. When the paperwork doesn't follow — or when the approved amount is less than the actual cost — a claim results.

The "constructive change" (work directed without a formal change order) is one of the most litigated issues in public works construction. Subcontractors who perform changed work without written authorization are taking a significant financial risk.

Prevention: Insist on written change order authorization before performing changed work. If field conditions require immediate action, document everything: the directive, the changed condition, the work performed, the labor and materials consumed, and the schedule impact. Submit the change order proposal promptly, and follow up in writing if approval is delayed.

The common thread across all five of these claim categories is documentation. The subcontractors who avoid or win disputes are the ones who create clear records at every critical moment — starting with the bid itself.

The Bottom Line

Every one of these five claim triggers shares a common thread: they are preventable with better documentation at the front end. Subcontractors who survive and thrive in public works treat their bid documents, daily reports, and written correspondence as legal instruments — because that is exactly what they become when a claim hits. The five minutes you spend documenting an issue today saves five months of dispute resolution tomorrow.