The vehicles, a dark grey Citroen C5 and a blue Jeep Cherokee, were subsequently taken from outside the property.
The incident took place between 7.30pm and 8pm on Monday, February 10.
DC Gareth Hodgson, of the Bishop Auckland Serious Crime Team, said: “I believe this crime may be linked to a number of other recent similar offences in the area.
“Historically the stolen vehicles have been used in the commission of further offences.”
Witnesses should call Durham Police on 101 or Crimestoppers anonymously on 0800-555-111.
ONESIE NIGHT: There will be a charity onesie night at Evenwood Workingmen’s Club in aid of critically ill youngster Mason Campion on Friday, March 7, at 7pm. Singer Sue Allen will be performing and there will be a disco and raffle. Admission is £1 wearing a onesie and £2 without. Anyone able to donate a raffle prize should contact Alison Stoker on 07971-951566.
HISTORY SOCIETY: The first meeting of Etherley and Toft Hill Historical Society will take place at Etherley Methodist Chapel on Wednesday, February 19, at 7pm. People are invited to bring their own photos and documents about the villages to share their memories.