Industry Deep-Dive · 14 min read

Completed Operations and Construction Defect Insurance

Completed-operations coverage is the part of commercial general liability insurance that may respond to covered bodily injury or property damage arising from finished work after the work is complete. It is not a warranty for defective workmanship: the cost to replace faulty work may be excluded even when resulting damage to other property is potentially covered. Form language, state law, project facts, and the timing of damage control the analysis.

About the author

Reza Azar · Senior Insurance Broker · OnePark Risk

Completed operations defined

Operations are generally treated as completed when contract work is finished, the work at a site is finished, or the work is put to its intended use, as specified by the policy. The products-completed operations hazard then addresses qualifying injury or damage away from the insured's premises. The same completion test appears in the additional-insured forms: ISO's CG 20 10 excludes injury or damage occurring after all work on the project has been completed or after the portion of the work out of which the injury or damage arises has been put to its intended use by someone other than a contractor working on the project (CG 20 10 04 13 sample). Exact triggers differ by form and endorsement.

Defect versus resulting damage

The central comparison is between correcting the contractor's deficient work and damage caused by that work. Replacing an improperly installed connection may be a business-risk or warranty cost; water damage to unrelated finishes may present a different GL question. Courts differ over whether defective work is an occurrence and how “your work,” “your product,” and impaired-property exclusions apply, so no outcome should be assumed across states.

Occurrence timing and policy years

A defect claim may involve installation in one year, hidden damage over several years, and discovery later. Policies may be implicated according to when covered damage occurred, not merely when suit was filed. Trigger and allocation rules vary by jurisdiction. Preserve the policy tower and notify every potentially involved carrier rather than selecting one year without analysis.

Exclusions and endorsements to review

Your work, your product, and damage-to-property exclusions
Subcontractor exception, if present, and endorsements that modify it
Residential, condominium, tract-housing, EIFS, mold, and subsidence exclusions
Prior work, known loss, continuous damage, and designated-project limitations
Professional-services and pollution exclusions
Products-completed operations aggregate and any project-specific aggregate. The ISO per-project aggregate endorsement, CG 25 03, gives each designated project its own general aggregate for ongoing operations but leaves damages within the products-completed operations hazard subject to the single products-completed operations aggregate (CG 25 03 form text, Iowa SUDAS reproduction; IRMI, designated construction project general aggregate limit endorsement), so a defect claim after turnover draws on a limit the per-project endorsement does not multiply.
Completed-operations additional-insured endorsements held for upstream parties. CG 20 37 covers the owner or GC for injury or damage caused in whole or in part by the subcontractor's "your work" at the scheduled location and included in the products-completed operations hazard (CG 20 37 04 13); the 2001 edition used the broader "arising out of your work" wording (CG 20 37 10 01), and the edition attached determines which standard applies.

Contract, warranty, and insurance coordination

Warranty obligations can require correction even when no covered property damage exists. Indemnity provisions may allocate responsibility without creating insurance coverage. Builder's risk ordinarily concerns physical loss during construction, while completed-operations GL concerns qualifying liability after completion. Professional liability may be relevant to design error. Read these instruments together and avoid treating one as a substitute for another.

Closeout checklist

Keep executed contracts, drawings, specifications, RFIs, change orders, and daily logs.
Record substantial completion, acceptance, occupancy, and warranty dates.
Retain subcontractor COIs and completed-operations additional-insured endorsements (CG 20 37 or an equivalent), and diary each subcontractor's renewals: the upstream party is protected for a post-completion period only while that endorsement is on each successive policy (IRMI, Questions and Answers on Additional Insured Issues, Part 2).
Archive policies, schedules, and endorsements for each project year.
Document punch-list and warranty work without characterizing causation prematurely.
Establish prompt internal notice and litigation-hold procedures.

Underwriting inputs

Project types, states, values, delivery methods, and work-at-height or subsidence exposure
Percentage self-performed and subcontracted by trade
Residential, condominium, and tract-work history
Quality-control, water-intrusion, and commissioning procedures
Open defect allegations plus five years of loss runs
Historical policies and completed-operations record-retention practices

Responding to an allegation

Preserve evidence, notify current and historical insurers, comply with policy cooperation duties, and avoid voluntary repairs or admissions that could prejudice rights. Emergency mitigation may be necessary, but coverage for those costs depends on the policy and circumstances. Engage coverage counsel where appropriate; this educational framework is not legal advice or a prediction of claim payment.

Where the answer depends on the edition, the wording, the state, and the contract

The completed-operations analysis changes with the forms attached. For upstream parties relying on a subcontractor's policy, the edition of the additional-insured endorsement controls: the pre-1993 "arising out of your work" editions were widely assumed to include completed operations, the 1993 revision limited coverage to ongoing operations, and ISO added CG 20 37 as the separate completed-operations form in 2001 (IRMI, Additional Insureds and Completed Operations, 2001; IRMI, 2013 ISO Additional Insured Endorsements). Since 2013 those forms apply only to the extent permitted by law and no broader than the contract requires, so the contract's completed-operations clause and the project state's anti-indemnity statute are part of the coverage question. For the contractor's own policy, the "your work" exclusion, its subcontractor exception, and any endorsement deleting that exception are carrier- and policy-specific, and whether defective work is an "occurrence" is decided state by state. The issued policy, the endorsement editions, the executed contracts, the dates damage occurred, and the governing law control; nothing here predicts a coverage outcome.

Does completed-operations insurance pay to redo defective work?

Not necessarily. GL commonly distinguishes the contractor's own faulty work from covered resulting bodily injury or property damage, and exclusions and state law affect the result.

How long should completed-operations coverage be kept?

Match the prime contract and obtain legal guidance on applicable limitation and repose periods. Those periods vary by state, project, and claim. For an upstream party, completed-operations additional-insured status lasts only as long as a CG 20 37-type endorsement is carried on each successive policy, so the contract should state the period and the file should track each renewal.

Which endorsement gives an owner or GC completed-operations additional-insured status?

On ISO forms, CG 20 37 (Additional Insured—Owners, Lessees or Contractors—Completed Operations), or since December 2019 an automatic form such as CG 20 39 or CG 20 40. CG 20 10 covers ongoing operations only. Carriers may use their own equivalents, and the edition attached controls.

Which policy year handles a latent defect?

Potentially one or several years, depending on when damage occurred and the jurisdiction's trigger rules. Notify all plausibly implicated insurers.

Does a subcontractor exception guarantee coverage?

No. It may narrow a your-work exclusion, but all other insuring terms, exclusions, endorsements, and facts still apply.

Is builder's risk the same as completed operations?

No. Builder's risk generally covers insured project property during construction; completed-operations GL addresses covered liability arising from completed work.

Can a warranty claim exist without an insured claim?

Yes. A contractual promise to correct work can apply even when no covered occurrence or resulting damage triggers liability insurance.

Frequently asked questions