Who We Insure

Insurance for Architecture Firms

An architecture firm's exposure has an unusual shape: the mistake and the claim can be separated by years. A detail that reads correctly on the drawings, a specification that proves inadequate once the building is in use, or a code interpretation that a jurisdiction later challenges may not surface until long after the ribbon is cut — and when it does, the owner, the contractor, or a future occupant looks to the firm that designed it. Design professional liability is the coverage built for exactly that long-fused risk.

Why architecture firms carry specialized insurance

Because this exposure is claims-made and the discovery period can span years, continuity and tail planning are not administrative details for architects — they are the difference between coverage and a gap. A lapse between policies, or a missing extended reporting period when a principal retires or the firm restructures, can strip protection from a lifetime of completed projects. Project owners understand this, which is why insurance requirements now appear in nearly every design contract. A OnePark Risk advisor structures an architecture firm's program around its project types and delivery methods — new construction versus renovation, traditional design-bid-build versus design-build — because each shapes the firm's exposure and the certificates owners will demand. The aim is continuous professional liability with the general liability, property, and workers' compensation pieces that field visits and a working studio require.

The risk profile of an architecture firm

Architecture claims are defined by delay: design decisions are tested in the field and in use, and the resulting disputes often arrive well after the firm has moved on to other projects. Key exposures: Design errors and omissions in drawings, details, and specifications; Code-compliance and permitting interpretations challenged by jurisdictions or owners; Coordination gaps between architectural drawings and consultants' work; Delay and cost-overrun claims attributed to design issues during construction; Long-tail claims surfacing years after project completion; Bodily-injury and property exposure during site visits and construction observation.

Architects Professional Liability (Design E&O) for architecture firms

The core policy for any design practice. It responds when an owner or contractor alleges a design error or omission caused financial harm — rework, delay, or defect — and it funds defense counsel from the first notice, which for design claims can arrive years after completion. Because it is claims-made, continuous coverage and a well-planned tail are essential to keep past projects protected as the firm and its principals change. Typically responds to: defense costs for design error, omission, and coordination allegations; settlements and judgments up to the policy limit; claims tied to code, permitting, and specification disputes.

General Liability for architecture firms

Architects are on job sites for construction observation and site visits, where ordinary bodily-injury and property-damage exposure is real. General liability answers those third-party claims and satisfies the certificates that owners, contractors, and landlords require before the firm is allowed on site or into a lease.

Business Owners Policy (GL + Property) for architecture firms

A studio runs on equipment — workstations, plotters, models, and archived drawings — and a BOP bundles the firm's property coverage with general liability at a favorable rate. It is the practical backbone that covers the office itself and the tools the firm depends on day to day.

Workers' Compensation for architecture firms

Required where the firm employs staff, and site visits add physical exposure beyond the studio. It funds medical care and lost wages for injured employees — including travel to and time on active construction sites — so those costs do not fall on the firm.

Cyber Liability for architecture firms

Firms hold project drawings, BIM models, client information, and proprietary design work in systems that a breach or ransomware event can lock or leak. Cyber coverage funds forensics, restoration, notification, and the business-interruption loss when a firm cannot access its active project files — an increasingly common way for a studio's work to grind to a halt.

Hired & Non-Owned Auto for architecture firms

Architects drive personal and rented vehicles to sites and client meetings constantly, and the firm can be liable when an employee causes an accident on company business. This coverage answers that exposure, which a standard business policy leaves open.

Contract and certificate requirements

Project owners drive an architecture firm's insurance requirements, and they set them per project. Design contracts routinely require professional liability at named limits — $1 million per claim is a common floor, with larger or public projects requesting $2 million–$5 million or more — plus general liability, and owners frequently require a certificate specific to the project and ask to be named as additional insureds on the general liability. On larger commissions, owners may also require the firm to maintain coverage for a stated number of years after completion, reflecting the long-tail nature of design claims. Because these requirements arrive project by project and vary with project size and public versus private ownership, your advisor should review each contract's insurance exhibit against the firm's actual limits before signing. Committing to a per-project limit or a post-completion maintenance period the program does not support is a common and avoidable trap.

What coverage costs

As of 2026, architecture professional liability pricing is driven by the firm's revenue, its project types and sizes, delivery methods, claims history, and the limits its contracts require. A firm doing large or complex projects — or working in design-build arrangements that expand its exposure — will price above a small residential or renovation practice, because the severity of a potential design claim differs. General liability and workers' compensation costs reflect the amount of field work the firm does, since construction observation carries more physical exposure than desk work. Cyber pricing tracks the firm's data-handling controls; IBM's Cost of a Data Breach Report 2026 put the global average breach cost at $4.99 million, and a studio that cannot reach its active BIM models mid-project feels the business-interruption side of that acutely. Rather than quote a single figure, a OnePark Risk advisor aligns the firm's professional and general liability limits to its project contracts and benchmarks the program across carriers so the firm sees how project mix, limits, and retentions move the premium.

Illustrative example: The specification that failed later

A firm designs a mixed-use building and specifies an exterior assembly that performs adequately at first. Three years after occupancy, water intrusion appears, the owner traces it to the specified detail, and the firm receives a demand for the cost of investigation and remediation. Architects professional liability assigns defense counsel and funds the defense; because the claim arrives years after completion, the firm's continuous coverage and any required post-completion maintenance period are what keep the policy responsive, with resolution paid within the limit less the deductible.

Illustrative example: The site-visit injury

During a construction-observation visit, a subcontractor's worker is struck by equipment near where the firm's project architect is standing, and the resulting claim names the architecture firm among the parties present on site. General liability responds to the third-party bodily-injury allegation and funds the firm's defense, satisfying the coverage the owner's contract required the firm to carry before it was allowed on site.

Illustrative example: Ransomware on the project server

A firm's file server is encrypted overnight, locking every active project's drawings and models. Deadlines on multiple commissions are at risk while the firm cannot open its own files. Cyber coverage funds the incident-response firm, restoration from backups, and the business-interruption loss for the downtime, and it answers notification obligations if any client data was exposed in the attack.

How much does insurance cost for an architecture firm?

As of 2026, professional liability pricing is driven by revenue, project types and sizes, delivery method, claims history, and the limits contracts require. Small firms commonly structure professional liability at $1 million per claim / $2 million aggregate and add general liability, property, and workers' compensation around it, scaling limits up for larger or public projects. Because project contracts set their own requirements, the useful exercise is matching limits to the firm's actual project pipeline and benchmarking across carriers.

Why does the claims-made structure matter so much for architects?

Design defects often surface years after a project is complete, and a claims-made policy responds based on when the claim is reported, not when the work was done. That makes continuous coverage essential — a gap can strip protection from past projects — and it is why owners frequently require firms to maintain coverage for years after completion. When principals retire or the firm restructures, an extended reporting period preserves protection for prior work.

Is professional liability required for architecture firms?

State licensing boards govern who may practice architecture and stamp drawings, and while a universal mandate to carry E&O is not the norm, project owners effectively require it through their design contracts. In practice a firm without professional liability cannot win most commissions, so coverage is treated as a condition of doing business rather than an option.

How do project-specific insurance requirements work?

Owners set insurance terms per project in the design contract's insurance exhibit, specifying limits, additional-insured status on general liability, and sometimes a post-completion maintenance period. Requirements scale with project size and public versus private ownership, so each contract should be reviewed against the firm's actual coverage before signing to avoid committing to terms the program does not support.

Do we need cyber coverage as a design firm?

Yes. Firms hold drawings, BIM models, and client information in systems a breach or ransomware event can lock or leak, and losing access to active project files can halt work across multiple commissions. Cyber coverage funds forensics, restoration, notification, and the business-interruption loss from the downtime.

How is coverage for an architecture firm different from an engineering firm?

Both carry design professional liability, but the failure modes differ: architects face claims tied to design intent, specifications, coordination, and code, while engineers face higher-severity claims tied to calculations and system performance. Firms that offer both disciplines, or work in design-build, should make sure their program reflects the full scope of services.

Can OnePark Risk review our design contracts' insurance requirements?

Yes. We regularly review project insurance exhibits against a firm's actual limits, flag any per-project limits or post-completion maintenance obligations the program does not support, and adjust before the firm signs — so it is not agreeing to terms its policies cannot meet.

Frequently asked questions