The California Court of Appeal affirmed the trial court's decision that the defending insurer was not entitled to reimbursement of defense costs from another insurer based upon a subcontract and additional insured endorsement. Zurich Am. Ins. Co. v. Old Republic Gen. Ins. Corp., 2024 Cal. App. Unpub. LEXIS 1261 (Cal. Ct. App. Feb. 28, 2024).

Martin McNerney Development Company (McNerney) entered a construction contract to perform seismic upgrades and tenant improvements for condominiums. McNerney and Broadway Mechanical Contractors, Inc. (Broadway) entered a "Subcontract Agreement" under which Broadway was to perform plumbing work at the project. The agreement required Broadway to maintain general liability insurance naming McNerney as an additional insured for work performed on the project, including completed operations. The subcontract also required Broadway to indemnify and hold McNerney harmless with respect to all claims for damage to property arising out of work performed by Broadway.

Broadway completed its work on the project in September 2007. Broadway issued a one-year warranty for its work on the project.