The man was also ordered to pay roughly 500,000 kronor ($63,000) in damages to the victims, the Helsingborgs Dagblad newspaper reports.
The 42-year-old was convicted for the rape and sexual molestation of an 18-year-old girl as well as the aggravated rape and sexual molestation of her 13-year-old sister.
The man was also convicted on three other counts of rape or attempted rape involving a girl who was 14-years-old at the time and lived near the 42-year-old.
The man had been in custody since March, although the first reports of his attempted rape came from the 14-year-old in 2005.
He was also charged with attempting to rape a 10-year-old boy, but escaped conviction on the charge after the court ruled it was a case of sexual molestation rather than attempted rape and the statue of limitations on the latter crime had already passed.
During the trial, the 42-year-old admitted to having a sexual encounter with the 18-year-old girl, but denied any criminal wrongdoing.