Illinois: A Construction Overview
Five Trends Impacting Illinois Construction Law
A defining feature of the Illinois market is the prominence of high-value, technically complex projects. This sustained activity has positioned the state as a key jurisdiction for sophisticated construction law practices. Trends impacting Illinois construction law include the following.
Problem solving on complex projects
A cornerstone of any project is active engagement and problem solving, chasing schedule and cost, or resolving disputes effectively at the business table. Increasingly, clients are seeking counsel to manage risk throughout a project’s life cycle.
Engagement can start as early as contract negotiation and is further supported by industry experts, such as technical engineers to engineer the most effective path forward, pricing consultants to vet pricing, and scheduling experts to optimise the project’s schedule and if needed, advocate on a party’s behalf to reduce time impacts. Owners, alongside contractors willing to do so, have been increasingly problem solving at the business table.
Active, comprehensive engagement is critical to effective problem solving and if possible, issue spotting and managing risk before it arises. Such strategic risk management considers the business, technical, and legal aspects to manage issues efficiently and effectively. Owners are commonly faced with legal challenges, pricing risks, and internal and external politics and reporting requirements. Regardless, the focus remains on the clients’ broader business objectives. The business objects can range from project cost and schedule to the broader perception of the project.
Mitigating procurement challenges: availability and pricing
Market fluctuations, increasing material pricing, productivity availability, and tariffs have resulted in challenges to both owners and contractors. Owners want a price and schedule guarantee to manage the business economics while contractors desire to minimise cost and schedule risks.
Owners and contractors commonly find themselves at odds, particularly when pricing materially changes and the contractor can no longer afford to complete the job at the previously agreed price. This can be due to tariffs (possibly a change in the law, depending on a contract’s terms) or industry pricing fluctuations.
When a cost is disputed, a contractor may or may not perform the work. If it does and when payment is due, contractors commonly threaten a lien for the work performed but not yet paid. Mechanics’ lien law remains a cornerstone of construction law. The Illinois Mechanics Lien Act provides contractors, subcontractors, and suppliers with powerful tools to secure payment, but strict compliance with statutory requirements is essential as such liens continue to be scrutinised, potentially in an owner’s favour. Experienced counsel plays a critical role in preserving and enforcing lien rights, as well as defending against improper claims and any arguments related thereto during negotiations of disputes. Nonetheless, some parties have elected to active risk management on payment issues, or even payment disputes relative to industry pricing issues, by discussing and resolving them at the business table in lieu of a lien and related litigation.
Early dispute avoidance
When issues arise, the continued trend is that parties are seeking a resolution that makes sense, is cost-sensitive to out-of-pocket costs, and prevents the publicity of litigation. As such, some parties have worked harder to find resolutions at the business table and seek evaluation from a third-party to provide further insights and, if appropriate, support the resolution.
Illinois courts implement mandatory mediation or discretionary mediation. Cook County has a long-standing court-annexed mediation programme for civil matters, providing a court-ordered mediation at the judge’s discretion. To date, the programme reports a general 50-65% success rate for all civil matters based on cases that have partially or fully settled.
The challenge to early dispute avoidance is the complexity of a construction dispute. There is a continued trend to select and engage a seasoned construction mediator, typically a private mediator whereby the parties can tailor the mediation to the issue. There is also an increased use of evaluative mediations conducted by one or more respected construction law practitioners. On matters where a traditional mediation fails, parties are utilising evaluative mediation prior to spending time and money associated with arbitration. The critical aspect of evaluative mediation is the same: for each party to gain valuable insights from a third-party neutral to bridge the parties’ gap that is preventing resolution at the business table. Another trend is the use of third-party neutrals to provide support to settlement agreements and change orders as a “reasoned prudent decision”.
Commercial general liability insurance
Recent decisions expand when commercial general liability insurance (CGL) policies may provide coverage for construction defect claims while reinforcing the continued importance of specific policy exclusions and specialised professional liability coverage.
The Illinois Supreme Court’s 2023 decision in Acuity v M/I Homes of Chicago fundamentally altered long-standing expectations regarding CGL coverage in Illinois. Before Acuity, parties generally understood that a CGL policy would not cover defective construction claims unless the defective work caused damage to property outside the contractor’s scope of work or to other, non-project property. Rejecting decades of Illinois precedent, the Court held that unintended property damage resulting from a subcontractor’s defective work may constitute an “occurrence” under a CGL policy even when the damage is confined to the completed project itself. The decision aligns Illinois with the majority of jurisdictions and shifts the focus of coverage disputes from whether an “occurrence” exists to whether specific policy exclusions apply. As a practical matter, contractors and subcontractors are more likely to have insurance coverage for a defence, and potentially indemnity, in construction defect disputes.
Subsequent decisions illustrate both the breadth and the limits of Acuity. In Cornice & Rose International, LLC v Acuity, the Seventh Circuit Court of Appeals applied Acuity’s reasoning to conclude that an architect’s CGL insurer owed a defence where negligent design allegedly resulted in physical property damage, signalling that Acuity may extend beyond contractors to design professionals. By contrast, the Illinois Appellate Court decision in Allied Design Consultants, Inc. v Pekin Insurance Co. underscores that expanded coverage is not unlimited. Where a CGL policy contains an enforceable professional services exclusion, architects and engineers may still have no insurance coverage, reinforcing the need for design professionals to obtain professional liability insurance. Together, these decisions indicate that insurance policy language – not the threshold question of whether defective construction can constitute an occurrence – will now drive risk allocation decisions for construction projects.
Recent data centre legislation
Citing the demands on energy and water consumption, Illinois is at the forefront of a growing national trend to “pump the brakes” on the unprecedented boom in the construction of new data centres required to keep pace with the prolific increase in the use of artificial intelligence. On 2 June 2026, Governor JB Pritzker announced the suspension of tax incentives for data centre projects and called upon the Illinois legislature to pass comprehensive reforms requiring data centres to pay for the costs of their energy and water demand, support the generation of new renewable energy, as well as track and report water use, adhere to air quality standards and to enter into cooperative agreements with the communities that host them.