Class Code 1771

Concrete Work

SIC code for concrete contractors, structural and flatwork alike.

Trades that use this code

Related codes

Classification varies by state and carrier — several states use independent bureaus, and carriers file their own GL codes. Confirm your fit with a licensed agent before relying on any code. 🤝

Written and reviewed by the We Insure Things team — licensed independent insurance agents. Last reviewed July 23, 2026. Questions? Ask a licensed agent.

General references: NCCI · NAICS (Census) · your state insurance department. Codes summarized in plain English; official classification language controls.