SIGMA Engineering Laboratories provides professional special inspection, materials testing, and construction inspection consultation throughout the San Francisco Bay Area.

We serve commercial projects, new homes, additions, ADUs, and residential remodels, providing welding and structural steel inspection, wood framing and shear wall nailing inspection, epoxy anchor and rebar dowel observation, reinforcing steel inspection, concrete placement and sampling, high-strength bolting, and other required special inspections.

We work closely with homeowners, contractors, engineers, and project teams to coordinate required inspections at the appropriate stages of construction, maintain inspection documentation, and help keep projects moving toward final compliance and closeout.

SIGMA Engineering Laboratories is a recognized Special Inspection Agency throughout the San Francisco Bay Area Cities. We work with local building departments, contractors, engineers, and property owners to provide required special inspections, materials testing, and project inspection coordination from construction through final compliance. 

Competitive pricing. Responsive scheduling. On-time inspection service. Professional reports.

see the list of services we provide.