Renovation and addition to a laboratory facility in Gaithersburg, Maryland. Conceptual plans call for the renovation of a laboratory facility; and for the addition of a 190,000-square-foot, two-story above grade laboratory facility.

Modernization of NIST Bldg. 245,Radiological Research Laboratory Building 245 is a Radiation Physics Building containing approximately 85 laboratories plus ancillary control and support spaces each with individual requirements supporting unique radiological science. The overall modernization effort is a mix of replacement in-kind for labs to bring them up to code compliance along with relocation of several labs to new modernized areas within the building. The B245 Modernization Program supported the construction of new H-Wing and D-Wing Additions and remodeling of the existing wings of B245. Only C, D, and partial A-Wings have been completed to date along with the H & D Additions (approx. 190k GSF). The remaining efforts to be completed are, A-Wing and all of B-Wing (total of approx. 122k GSF) which are pending future funding. The building remains in an interim state, where only the modernized portion has been brought up to code. Existing untouched portions of the building continue to have leaks and are not code compliant. Each of the wings have constraints within the building regarding how utility systems are fed and with the end users regarding their calibration schedules as all the existing labs are occupied. Each of the wings are also extremely difficult to coordinate as they reach across two floors of the building and intersect the main thoroughfare corridors for the building. Remaining construction modernization efforts include: • A-Wing: Full modernization of 3 major laboratories and support spaces plus ancillary space and an original to the building elevator. • B-Wing: Full modernization of approximately 30+ laboratories of various sizes and support spaces. • Waterproofing. • Major excavation work to access mechanical/electrical chases above the A-Wing subbasement laboratories. • New electrical main closets and distribution throughout the building (main head-end equipment has already been installed). Electrical efforts will continue to modernize the electrical distribution system throughout the building. Includes connection to recently installed UPS and generator. • New HVAC distribution throughout the building including replacement of 20+ ACU zones to connect to both new and recently installed main system. Includes demolition of existing zones and incorporation into the recently installed larger variable ACUs and installation of remaining energy recovery units. • Reconfiguration of the main incoming IT room. • General installation of new fire alarm, fire suppression and life safety systems. Estimated Range between $200 million and $350 million *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document. As of February 6, 2026, the project is currently under evaluatoin. An issuance of short-listed firms has not been released. Information regarding design build firm selection timelines has not been disclosed.