California structural engineering services.

A structural engineer is commonly needed when work changes a load-bearing wall, beam, foundation, roof, deck, seismic system, or another part of the load path. The local building department makes the final permit and submittal determination.

Yes. Lei Zheng holds California Civil Engineer license C-69809, issued in 2006. The current status can be checked through the California Department of Consumer Affairs license record linked on this site.

Yes. The initial project consultation is free. We review the basic scope and available documents, then provide a written proposal for any site visit, inspection, calculations, or drawings.

A typical residential calculation-and-drawing package often takes one to two weeks after complete and coordinated inputs are available. The proposal states the project-specific delivery date and plan-check support scope.

We prepare and support the structural portion of the permit package. Architectural, planning, energy, MEP, and permit-expediting work are separate unless the written proposal includes them.

Fees depend on the property, access, existing documentation, permit jurisdiction, and engineering scope. Send the address, drawings or photos, and proposed work for a free initial review and a written fee proposal.

Yes. We size the replacement beam and posts, detail connections, trace new point loads to the foundation, and provide structural calculations and permit drawings.

CMZStudio serves California, with project experience across the San Francisco Bay Area, Sacramento, San Jose, Oakland, Los Angeles, and San Diego. Site visits and jurisdiction-specific scope are confirmed before scheduling.

Permit fees are set independently by each California city and vary by project scope, valuation, and jurisdiction, so an accurate number has to come from the local building department. Homeowners can look up their city's current permit fee schedule and application steps for free on GetYourPermit.