JL Modular specializes in permanent modular building projects for schools and universities throughout Northern California. Our permanent modular construction techniques combine the form and function of traditional site-built construction with the speed and cost efficiency of the modular construction process. JL Modular’s high-quality construction has a life span that far surpasses the typical modular construction the industry has to offer.. JLC (formerly Jeff Luchetti Construction) continues to grow because of our unparalleled work ethic, quality workmanship, superior service and client satisfaction. Our commitment to keeping the clients’ interests paramount has been an integral key to our success.