L H Laplante

Since 1986, L H Laplante has been a trusted provider of commercial and industrial HVAC, plumbing, and mechanical services in Plattsburgh, NY, and surrounding areas. As a family-owned business, we prioritize customer satisfaction by delivering high-quality solutions tailored to institutional, educational, and government clients. Our team of certified professionals combines decades of experience with a commitment to safety, precision, and industry-leading standards. We specialize in HVAC system installations, process piping, plumbing, and mechanical contracting, offering both bid-and-spec and design-build services. Our dedication to quality workmanship ensures lasting results, while our personalized approach fosters long-term client relationships.

With over 35 years of expertise, we remain focused on solving complex mechanical challenges for commercial and industrial facilities. Our reputation for reliability and excellence has made us a preferred partner for Northern New Yorks schools, municipalities, and businesses. By maintaining a clean, professional work environment and adhering to strict safety protocols, we consistently exceed client expectations. Whether upgrading existing systems or installing new infrastructure, our team delivers efficient, code-compliant solutions. Our deep understanding of commercial HVAC and mechanical systems positions us to address the unique needs of each project.