A vandal daubed blue all over the front of new homes under construction near Littleborough.
The attack happened on Thursday night at a new development off Union Road in the Wardle area of Rochdale.
Blue paint was thrown across the front of about six properties.
The incident has been reported to police.
The development features three and four bed properties which are up for sale for between £195,000 and £300,000.
A spokeswoman for Greater Manchester Police said: "At around 8pm, police received a report of vandalism on Union Road, Wardle.
"Officers attended and established paint had been thrown on to a number of houses on a development, causing material damage.
"No arrests have been made and enquiries are ongoing."
