Sinai Construction | Foundation Repair & Seismic Retrofitting in Los Angeles

Water damage from sources like water heater leaks, storm water intrusion, or sprinkler system failures can weaken a home’s foundation over time. In Los Angeles, we first perform a thorough structural inspection to assess moisture damage and soil movement. For active leaks, we coordinate with restoration teams to dry the area, then address the root cause—installing proper drainage systems, waterproofing basements or crawlspaces, and repairing any cracked or settled concrete. A 25-year warranty covers the permanent repairs, giving homeowners near neighborhoods like Echo Park or Sherman Oaks long-term peace of mind.

Our consultation begins on-site where Gary Sinai or a senior engineer reviews your structure, taking measurements and noting any signs of settlement, cracking, or corrosion. We discuss your concerns—whether it’s preparing for a seismic retrofit in a hillside area or repairing a retaining wall. Then we provide a written scope of work with engineering recommendations, cost estimates, and timeline. This service is especially common for older homes in neighborhoods like Silver Lake or Los Feliz, where hillside foundations require custom solutions.

Seismic retrofitting strengthens a building to resist earthquake forces. For soft-story structures—common in older apartment buildings or homes with a garage below living space—we install plywood shear walls, steel moment frames, and bolted connections between the foundation and framing. As a LADBS- and LAHD-certified contractor, we design retrofits per city code, often working in areas like Koreatown or the Westside. The goal is to prevent collapse and protect lives, and all work carries our 25-year warranty.