America’s Most Diverse
Steel Window and Door Manufacturer
MADE IN USA
Ellenville, NY
Certified
AAMA & NFRC
Most Diverse
Manufacturer
Since 1985
40+ Years of Craftsmanship
America’s Most Diverse
Steel Window and Door Manufacturer
Since 1985, Optimum Window® has grown into one of the largest and Most diversified manufacturers of custom steel windows and doors in the United States. Proudly made in America, our systems are engineered to deliver exceptional performance, design versatility, and long-term structural integrity.
Driven by continuous innovation and an unwavering commitment to excellence, Optimum has expanded its portfolio to include a comprehensive range of high‑performance, custom‑engineered metal window and door systems.
Our products support the fenestration community across a wide range of building envelope needs, including commercial developments, luxury residential projects, institutional facilities, historic landmark restorations, and governmental and correctional applications throughout North America.
For architects, builders, and owners seeking American‑made steel window and door solutions, Optimum offers unparalleled expertise backed by 40 years of manufacturing experience. We collaborate closely with design teams to bring conceptual designs to reality—customizing our systems to meet project-specific demands while complying with regional performance requirements.
Behind The Scenes
Why Choose Optimum
Optimum partners directly with architects, developers, and contractors who require tailored, precision‑engineered solutions. We combine industry-leading structural performance with refined aesthetics—bringing ambitious design concepts to life through advanced engineering and state‑of‑the‑art computerized manufacturing.
Our Capabilities Include:
- Operable fire‑rated windows rated at 45, 60, and 90 minutes
- Thermally broken stainless steel window and door systems
- Bronze thermally broken window and door systems
- Traditional steel windows and doors
- Aluminum window and door systems
- Correctional / security window systems
Every unit is custom manufactured in accordance with approved shop drawings and project specifications—ensuring precision, compliance, and design intent are preserved from concept through completion.
Our Mission
At Optimum, we take pride in manufacturing all systems in-house at our Upstate New York facility. This vertical integration allows us to maintain strict quality control, ensure schedule reliability, and deliver products that reflect the unique vision of each client.
Our mission is to elevate the fenestration industry by combining traditional craftsmanship with cutting‑edge technology—producing steel window and door systems that perform as beautifully as they look.
Innovation & Craftsmanship
For more than four decades, Optimum has pushed the boundaries of what steel windows can achieve. Through continuous research and development, rigorous product testing, and the skill of our engineers and artisans, we have pioneered advancements that have helped raise the standards of steel window systems globally.
From intricate architectural designs to large‑scale commercial installations, Optimum remains committed to delivering American‑made systems defined by strength, precision, and enduring design excellence.
Bring Strength and Style to Every Opening
Custom-crafted steel windows and doors that elevate modern architecture.
Optimum