Specialty Contractors For Demanding Environments



Longden Company Inc. has long been recognized as a leading cleanroom contractor here in New England and across the country, for both turnkey design/build and build-to-specification cleanrooms.

Longden is a company that understands cleanroom construction and clean-build protocol, dedicated to providing contamination-controlled environments.

Our experience ranges from building and installing a cleanroom under a general contractor, to delivering turnkey cleanroom construction and design/build services directly for a client.

Since 1988, Longden Co., Inc. has constructed cleanrooms ranging from Class 1 (ISO 3) to Class 100,000 (ISO 8) and varying in size from mini-environments to world-class semiconductor mega-fab installations in all segments (biomedical, pharmaceutical, semiconductor) of the cleanroom market.

Longden Co., Inc. has successfully completed projects ranging in size from small process isolators (6 square feet) to large semiconductor fabs (160,000 square feet).

Our experienced construction crews, along with our veteran project management team, assure that our client’s projects will be completed on time and on budget.

Our versatility and breadth of experience are unmatched, and we approach each project with a comprehensive understanding of the demanding requirements of the specialty products, their need for exact installation, and the concerns of special cleanroom protocols.

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