First Constable Steven Tung from the Ballarat Criminal Investigation Unit said examinations of fingerprints and shoe marks at the scene led to the identification of the alleged perpetrators.

Police executed a search warrant at a Canadian home on Friday morning and arrested a 20-year-old female from Canadian and a 17-year-old female from Lake Wendouree.

Both women are facing 30 charges each of burglary, criminal damage and theft.

Police investigated the property damage after site foremen from building companies made reports to police.

READ MORE: 'I feel very angry': Houses under construction in new estate targeted by vandals

The Courier was told some of the properties damaged were due to be handed over this week, with finishing touches underway on others to be ready for handover in the next few months.

Hearty Homes site foreman George Danciu said the buildings had sustained smashed fly screens, damaged plaster, smashed lights, spread paint and flood attempts.

He said the homes had been damaged in overnight attacks at least four times in the past two weeks.

Mr Danciu told The Courier on Thursday he found one of the properties flooded with water.

First Constable Tung said both alleged offenders were bailed on Friday morning.

The 17-year-old is due to face the Children's Court in October and the 20-year-old will appear at the Ballarat Magistrates' Court in March.

First Constable Tung said both women made admissions to police over the alleged offences and said they thought it was fun, did not think much of their actions at the time and did not think they would be caught.

He said police would be making a restitution application for the $80,000 damage to the properties.

First Constable Tung said he had not dealt with damage to new properties to this extent before.

"It was a two-week spree where they thought they could keep doing it," he said.

"We have had break-ins before with one or two houses, not 15 houses."

The properties targeted were part of the new Pennyweight Gully Estate between Joseph Street and Rodier Street in Canadian.

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