The offenders broke in to the house, in Robin Hood Lane, and stole two bottles of perfume, a chain, a white gold necklace, a pendent and a number of pieces of costume jewellery.
The owner, who was in the house at the time, was alerted to the offenders' presence when they heard a noise at the front door at about 3.15pm on Wednesday January 23.
Thames Valley Police is appealing for witnesses to the crime, and said a red transit-style van was seen during the incident.
If anyone has any information please contact investigator Jodie Nunes of Lodden Valley police station via the Thames Valley Police Enquiry Centre on 101.
If you don't want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court.