Precision instrument companies racing to bring new products to market are increasingly choosing prefabricated laboratory units over ground-up construction, since off-site manufacturing lets test and assembly space go from order to occupancy in a fraction of the time a traditional build requires.
Quality consistency is another factor behind the shift. Facilities sourcing from an established prefab laboratory supply chain get documented, repeatable specifications rather than the variability that can creep into custom field-built construction across multiple contractors and job sites.
Budget predictability rounds out the appeal. A defined prefab lab package, priced and specified before ground is broken, removes much of the estimating uncertainty that drives cost overruns in conventional laboratory construction. Reasons manufacturers give for the shift:

Manufacturers should specify a prefab cleanroom classification matched to the most sensitive instrument the space will house, rather than assuming a standard prefabricated tier will automatically meet precision optics or metrology requirements.
For programs planning future growth, confirming that a Prefabricated laboratory supplier can deliver matching units years later protects against being locked into incompatible specifications during a later expansion.
Facilities comparing vendors should also request references from completed prefab lab buildings serving comparable precision instrument applications, rather than relying solely on general industrial cleanroom project examples that may not reflect the same performance requirements.