A spate of burglaries and thefts from homes and cars is hitting Porirua and Kapiti.
Unlocked vehicles parked in driveways and open garages and sheds have repeatedly been targeted, according to police.
They are appealing to residents to secure their vehicles, homes and garages.
Detective Sergeant Rebecca Cotton said people being present at home didn't mean thieves wouldn't enter properties.
She said it was "disappointing for staff and victims when police need to attend these very preventable crimes".
"It sounds simple, but the message just isn't getting through. Police are working hard to reduce victimisation as part of the Prevention First strategy, but at the end of the day, we need the community to assist us and take some responsibility for reducing their own risk."