Underwriters Laboratories, Inc.

Updated: 28 April 2026

What Does Underwriters Laboratories, Inc. Mean?

Underwriters Laboratories, Inc. (UL) is a non-profit organization specializing in safety science. UL tests a wide range of products from companies around the world to ensure they comply with safety standards, including their environmental impact. They issue certificates for products that meet these standards.

Insuranceopedia Explains Underwriters Laboratories, Inc.

Underwriters Laboratories, Inc. (UL) was founded in 1894 by electrical engineer William Henry Merrill. It is currently headquartered in Northwood, Illinois, and operates 46 offices worldwide.

The organization often emphasizes that receiving a UL certificate for a product does not equate to government approval. Only federal and state authorities have the power to approve a product for sale in the commercial market.

Nevertheless, UL’s prestigious reputation has not only made it easier for products to undergo testing and approval in many countries, but it has also facilitated the global market penetration of UL-certified products. This is due to the organization’s renowned standards of scientific research and the rigor of its product testing.

For homeowners, UL certification on items like electrical panels, smoke detectors, and appliances is worth paying attention to. Some insurers consider the safety ratings of household products when assessing risk, and a fire caused by a non-certified appliance can raise questions during a claim. If you’re unsure what your policy would pay for in that situation, it’s worth reviewing what homeowners insurance covers. Comparing how different carriers handle these claims is also one of the reasons to look at the best homeowners insurance companies before choosing a policy.