Seismic & Structural Retrofit

Every building carries its own history—and its own vulnerabilities. At Treeline Construction, we specialize in strengthening those structures without erasing what makes them unique. Our team has completed seismic and structural retrofits across California, reinforcing aging and historically significant buildings to withstand the forces of time, use, and nature.

These projects are among the most challenging—and most meaningful—work we do. They call for a precise balance of engineering and craftsmanship: upgrading a building’s core strength while protecting the materials, details, and proportions that define its character.

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From foundation stabilization and shear-wall installation to full seismic reinforcement, we collaborate closely with architects, engineers, and owners to craft solutions that are effective, efficient, and respectful of the original design intent.

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The result is a structure that not only meets modern safety and code requirements, but also endures as a living piece of California’s architectural story—stronger, safer, and ready for generations to come.