Not really, but neat looking http://www.universetoday.com/107564...14-orion-test-flight-service-module-complete/
Not quite as stringent as the JPL clean room in which the Mars Curiosity rover was built, but that assembly bay in the Operations & Checkout Building is still more clean room than anything. The only time I'd expect a starship engine room to look like that is before any of the works had been installed.