A house in Crossways Avenue, East Grinstead, was broken into between 8am and 9pm on Tuesday May 27.
A rear patio door was smashed and an untidy search was carried out in the property although it is believed nothing was stolen.
Detective Constable Karen Young said: "If anyone saw suspicious activity in the area at that time we ask them to contact us via 101 or email 101@sussex.police.uk quoting serial 1502 of 27/5.
"You can also call the independent charity Crimestoppers anonymously on 0800555111."
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