Police are appealing for witnesses after a number of thefts were reported in Philpstoun, Winchburgh and Threemiletown last week.
Homes were broken into between Monday, December 28 and Tuesday, December 29 and a number of items were taken, including a three-figure sum of cash and precious jewellery.
Officers say they believe the same person could be responsible for the spate of housebreakings and are asking for help to trace the suspects.
A house in Niddry Road, Winchburgh, was broken into and a significant sum of money was stolen from inside sometime between 8am and 7pm on Monday.
There was an attempted break-in on Monday at a home in Canal Court, Threemiletouwn, and police were called after the occupant disturbed someone trying to access the house through the front door.
Jewellery and a three-figure sum of cash was taken from a home in Niddry View, Winchburgh, between 2.50pm on Monday and 2.30am the following day.
A final theft occurred sometime between 4.15pm and 7.15pm on Tuesday at a property in Miller Street, Winchburgh. A BMW 116D Sport with registration number SM59 CCU was stolen during the break-in.
Police say the crimes are linked and those responsible could have also taken a Volkswagen T-Sporter from Philpstoun on Monday.
Constable Ross Hamill from the Community Investigation Unit in Livingston said: “Given the proximity of all of these offences and the close time frame in which they took place, we believe the same people have been involved and are keen to hear from anyone who can help us identify these individuals.
“In addition anyone who remembers seeing any suspicious activity within Philpstoun, Winchburgh or Threemiletown between Monday 28 and Tuesday 29 should also contact police immediately.”
Anyone with information is asked to contact Police Scotland on 101 or alternatively, the charity Crimestoppers on 0800 555 111.