Queensland's major drug offenders are spending nearly half their dirty money on real estate, new research shows.

The Crime and Corruption Commission found 46 per cent of the average drug offender's net asset value was held in real property. This was followed by cash, vehicles and vessels, money in bank accounts and other assets.

Ice led to Jamie May's state, the court found. Credit:Fairfax Media

On average, cocaine offenders were the richest while methamphetamine offenders had the least amount of assets, according to a study of 233 offenders whose assets were seized by the CCC under proceeds of crime laws between 2009 and 2014.

The types of offenders included drug producers, traffickers, suppliers and people found in possession of illegal substances.