to get rid of any urine odors, cats dogs humans etc.....
pull everything from the space, remove and discard carpets
etc,........ scrub area totally
sand floors lightly coat with OUTDOOR POLYURETHANE.
Prime walls with oil based BIN or KILZ primer sealer.
even coat concrete floors after cleaning with outdoor poly.
This is what the professional fire restoration crews do.
its impossible to wash away urine odors, the only effective treatment
is coating surfaces and enscapalting them forever......
incidently i have had to do this.....
use outdoor poly because its water proof, regular poly can and does
soften in wet weather, like high hmidity days and the odors reoccur