Welcome to Modular Construction by JTC Construction, proudly based in Alva, Oklahoma and serving customers nationwide. We specialize in high-quality modular greenhouses, sheds, lean-tos, even-span structures, chicken coops, and custom outbuildings designed for durability, efficiency, and long-term performance. Our cedar-built greenhouses are available in both standard and fully custom designs to fit your exact space, needs, and growing goals. Combining practical craftsmanship with modern modular construction methods, we create reliable structures for agricultural, residential, and commercial applications from compact backyard builds to large-scale custom projects. With nationwide shipping and installation available throughout much of the Midwest and surrounding states, our mission is to deliver durable, functional, and customizable buildings built to last. 

At Modular Construction by JTC Construction, we are committed to providing every customer with honest communication, dependable craftsmanship, and personalized service from start to finish. We believe every project deserves attention to detail, quality materials, and a structure built to stand the test of time. Whether you choose a standard model or a fully custom design, our team is dedicated to delivering modular buildings that meet your needs, fit your space, and exceed your expectations. Your satisfaction, trust, and long-term success are at the foundation of everything we build.