Jn Construction

Jn Construction operates as a full-service fire protection contractor in Ontario and the greater Inland Empire, holding seven CSLB classifications including General Engineering (A), General Building (B), and specialized trades covering electrical, fire protection, warm-air heating, and plumbing systems. Since 2015, the corporation has provided fire sprinkler installation and inspection, fire alarm systems, backflow testing, fire extinguisher service, and kitchen hood cleaning across commercial and industrial properties. The company maintains a 3.7-star Google rating based on 23 customer reviews. Their CSLB license 1001396 remains active and in good standing with the California Contractors State License Board.