Thirdwall Construction

ThirdWall has been a fundamental general contracting force in the metropolitan Washington, DC-Baltimore region for more than four decades. From our beginning as Therrien Waddell, we have built exceptional projects as well as enduring industry partnerships through our continuing commitment to excellence. At ThirdWall, we believe in treating others as we want to be treated. This guiding principle, coupled with our dedication to quality craftsmanship, has established us as a trusted name in the construction industry. Our team draws inspiration from the theater concept of the "third wall"—the invisible barrier between performers and their audience. Just as talented performers recognize and overcome this barrier to engage with their audience, we aim to break through traditional construction boundaries to create dynamic and innovative spaces that exceed expectations. Our mission is to bring your vision to life with creativity, precision, and a commitment to excellence.