JL Molding Design Architectural Trim and Molding Installation in NJ JL Molding Design is located in Hillsborough New Jersey. We devote the time to both design and install custom architectural trim and millwork that will complement your homes interior decor. By using our services, you receive a personalized one on one design consultation for your interior decorating to help you visualize which mouldings will look best in your home. We will listen to your needs and will work with you to get you the look that you desire. You will not only receive the highest quality of work but an accurate and clean install as well as an on time completion. How many contractors do you know that will vacuum after they work ? We do! I like to say that we leave your home just as clean as when we arrived. Remember, its the little things that we do that makes a difference. Installing moulding in the New Jersey NJ area.