A woman has been charged with two counts of murder and one count of arson over the alleged double murder of a brother and sister more than a decade ago.

The 34-year-old Kallangur woman has also been charged with possessing a dangerous drug.

April and Ian Bailey were found dead inside their home at Deception Bay, north of Brisbane, in May 2004.

The house had been destroyed by fire and forensic examinations revealed the pair had been killed prior to it being lit.

Ms Bailey's daughter, who was four at the time, is believed to have witnessed the crime.

Several triple-0 calls were made around the time of the blaze, and one was believed to have captured the scream of Ian Bailey prior to the fire being lit.

Last year detectives said an appeal for information had brought forward several new witnesses, and they were confident they would solve the crime thanks to advances in forensic investigation.

The woman been remanded in custody and is due to appear in the Redcliffe Magistrates Court on Monday.