Professional Liability / E&O Contractors CA

If you provide any design input, value engineering, or professional judgment beyond pure installation — even occasionally — that exposure may not be covered by general liability alone.

Occurrence coverage responds based on when the incident happened, regardless of when the claim is filed. Claims-made coverage generally responds based on the policy in force when the claim is actually made — which makes continuous coverage important.

Ask specifically about prior-acts coverage — without it, a claim arising from work performed under the old policy might not be covered by the new one, creating a real gap.

Extended reporting period, or "tail," coverage extends the window to report a claim after a claims-made policy ends — worth discussing if you stop offering design services or close the business.

Potentially — even limited professional services exposure should be disclosed to your broker so it can be evaluated, rather than assumed to fall under standard general liability.

Increasingly yes — read the actual contract's insurance requirements section rather than assuming a standard general liability limit satisfies a design-build project's requirements.

In this context, yes — the terms are generally used interchangeably for coverage responding to claims alleging a negligent act, error or omission in professional services.

Not automatically — a business car insurance quote is usually priced and quoted as its own line, though a broker handling multiple lines for the same business can often coordinate effective dates and limits across the whole program.

Often, yes. Hiring a licensed, insured design subcontractor or engineer for delegated design — trusses, HVAC, fire protection and similar scope — doesn't automatically transfer the entire design risk away from the general contractor. Because the GC selected and directed the design process, it can remain vicariously liable for that design even without personally stamping the drawings. This is exactly the exposure contractor professional liability / E&O is built to address, separate from what a standard general liability policy responds to.

Design-build contractor professional liability — contractors E&O in California, covering the design side of a design-build project — responds to a design error insurance claim when a contractor holding single-point responsibility for both design and construction is found professionally negligent in that design role. Standard general liability excludes this entirely; contractor professional liability in California is the coverage built specifically for delegated design and design-build exposure.

Mechanical contractors providing system sizing or load calculations on larger commercial projects carry a real, comparable professional liability exposure. See our commercial refrigeration contractor insurance California guide for how this applies specifically to HVAC and mechanical scope.