Los Angeles County represents one of the largest construction markets in California with hundreds of public works projects. Major bid sources include LA County DPW, LA County Water Works, Caltrans, and the City of Los Angeles. To get started: (1) Register for bid portals, (2) Complete prequalification (2-4 weeks), (3) Know prevailing wage requirements, (4) Review bid documents carefully, and (5) Submit your bid before deadline. Common mistakes include not attending job walks, incomplete insurance documentation, incorrect prevailing wage calculations, missing bonds, and ignoring specifications. Key contacts: LA County DPW (626) 458-6949, LA Water Works (213) 217-6000, LA City Public Works (213) 847-3000. Start by registering for bid portals and applying for prequalification immediately. The construction market in LA County is robust with hundreds of opportunities annually.