Sinai Construction is Southern California's oldest and most reputable foundation contractor with over 27 years' experience in foundation repair, seismic retrofitting, basement waterproofing, yard drainage, hillside foundation construction, slope repair, and other structural and concrete work. We have a General Engineering Contractor license and a General Contractor license. We are a member of the ICRI, and we are an A+ rated member of the Better Business Bureau. We are also the recipient of the Talk of the Town Award and the 2011 Angie's List Super Service Awards.