You can refer to a building as a safe house when it is used as a place where someone can stay and be protected. Safe houses are often used by spies, criminals, or the police.
...a farm which operates as a safe house for criminals on the run. [+ for]
safe house in British English
noun
a place used secretly by undercover agents, terrorists, etc, as a meeting place or refuge
safe house in American English
a house, apartment, etc. used as by an intelligence agency or underground organization as a refuge or hiding place
Examples of 'safe house' in a sentence
safe house
He is now in a police safe house.
The Sun (2010)
She is staying in a safe house and may be moved to a new home.
Times, Sunday Times (2006)
His family would be moved to a safe house and given new identities after the cases were over.
Times, Sunday Times (2008)
They try to disappear into the no man's land of safe houses and new identities.
Times, Sunday Times (2009)
A police source said that the woman had not been moved into a safe house but that police were in daily contact with her.
Times, Sunday Times (2009)
There is an infrastructure of help for women who are victims of domestic abuse, including safe houses and refuges, but little available for men.