Burglars smashed a rear patio door to get into a house in Stanion and steal jewellery and electronic items.
The property in Kettering Road was broken into between 1pm and 4pm on Tuesday, January 27.
Police have said a large quantity of jewellery was taken.
Officers are keen to hear from anybody who saw anything suspicious in the area around the time of the burglary.
A suspicious incident was called in on the same day involving a VW Passat and officers would like to hear from anybody who thinks they may have seen the vehicle in the area that day.
Witnesses, or anyone who knows anything about this incident, can call Northamptonshire Police on 101 or Crimestoppers on 0800 555111.