A breeze block was thrown through the window of a house in Portadown in a late night attack on Friday.
It happened in the Crawford Park area of the town.
There are no reports of any injuries.
Police say this was the second time the home has been targeted.
They have appealed for anyone with information on the criminal damage – which happened at around 11pm – to come forward.
Anyone who can help can contact the PSNI on the non-emergency number 101 quote Ref 1587 of 4th August 2017.