Contractor License #465364
Modular Cleanrooms, Cleanroom Contractor & Manufacturer, Cleanroom Equipment, Cleanroom Testing, Cleanroom Certification
Modular Cleanrooms, Cleanroom Contractor & Manufacturer, Cleanroom Equipment
Built for the World's Most Demanding Environments
Class One Cleanrooms is the best Modular Cleanroom contractor in the industry. We manufacture our own Modular Cleanrooms and modular Clean room wall system in our California factory. The leading California Cleanroom Contractor of Modular Cleanrooms since 1976.
Our Modular Cleanroom Services
Turn Key Cleanrooms
Building customizable cleanrooms in any scenario from warehouses to office space, we adapt to any location. Various wall materials from FRP, Aluminum, Melamine hard board, Melamine on Gypsum, with core options such as foam, aluminum honey comb, or paper honey comb.
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Cleanroom Ceiling Systems
Our CG-200 T-Bar Ceiling system offers heavy duty, cleanable, polyester painted aluminum for all cleanroom applications. Offering wire hung or thread-rod and turnbuckle. Tiles from vinyl faced gypsum, aluminum, or FRP.
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Cleanroom Flooring
Welded Vinyl that is seamless and coved up the walls for all different types of cleanrooms. ESD option available.
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Cleanroom Mezzanines
For maximization of storage or adding additional space for manufacturing and packaging.
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The Precision Your Work Demands. The Reliability It Requires.
We don't just build rooms. We engineer controlled environments where the smallest tolerance has the largest consequence.
Zero-Compromise Standards
Every environment we deliver is independently validated against ISO 14644, EU GMP Annex 1, and FDA CFR standards.
Rapid Modular Deployment
Our pre-engineered modular systems reduce installation time by up to 60% versus traditional builds — without cutting corners.
50+ Years of Expertise
50+ years of delivering mission-critical environments across aerospace, semiconductor, and life science sectors.
End-to-End Partnership
From conceptual design and validation through ongoing maintenance — we remain your partner for the life of the facility.
Testimonials
“This is the third Cleanroom Paul Varni at Class One Cleanrooms had built us over the last 10 years. We always get the best service and a good price. The FDA said our cleanroom was the best they have seen and approved us for production on their first inspection.” Nutraceutical 15,000 sq. ft., 6700 sq. ft. Class 10,000 ISO 7 Cleanrooms.
“We got better than expected at the best price of 4 quotes. We had a very complicated cleanroom and Class One Cleanrooms was the only company to figure out how to build it.” Class 100 ISO 5 1100 sq. ft. Cleanroom.
“We have had Paul Varni build 4 cleanrooms for us now and we will trust no one else to build our cleanrooms. We had others build before using Class One Cleanrooms and we had nothing but trouble with the FDA.” Sterilized Filling Room Class 100 ISO5 Cleanroom. Cecilio
Modular Cleanroom
With over 50 years of designing and manufacturing prefabricated cleanrooms also known as Modular clean rooms, our cleanrooms approach is simple – we will design your cleanroom that meets your requirements and install it fast. Modular Cleanrooms is our only business, We are a California Cleanroom Contractor of cleanrooms utilizing non-progressive modular cleanroom wall system that looks great and performs to meet your exact cleanroom needs. Class One Cleanrooms is the originator of Modular Cleanroom and the negative cleanroom plenum design, which has become the industry standard for the most cost-effective cleanroom. We are the oldest cleanroom contractor in the cleanroom construction industry.
That is why Class One Cleanrooms is your best choice to design and build your cleanroom.
Class One Cleanrooms factory located in Orange County California since 1976 has introduced our all new modular cleanroom with non-progressive 3″ modular cleanroom wall design that allows electrical in every connecting post and both sides accept standard duplex outlets and switches.
Whether you need a standard built Cleanroom or a modular cleanroom we are sure you will love our design.
