Requires certain State-funded construction projects to utilize plastic construction materials that contain certain amounts of postconsumer recycled content.

S 3802 requires New Jersey state, county, and municipal construction projects to use plastic construction materials containing at least 10% recycled content from used products (postconsumer recycled content) for materials purchased within two years of the law's effective date, increasing to 15% afterward. The law applies specifically to materials made of over 50% plastic by cost, defined as items brought to a project site for incorporation into buildings or infrastructure. Exemptions apply if using compliant materials would raise project costs by 25% or if such materials aren't available for the intended use. This bill directly affects government agencies managing public construction and suppliers of plastic building materials.