"As the potential purchaser, it is your responsibility to commission P testing as due diligence," he said.
"And long gone are the days when you could have a property looked over by a friend with building experience.
"Just as the leaky building problem has made a qualified building inspector essential when looking to buy, the P scourge should make methamphetamine testing mandatory."
Last week's 494kg methamphetamine seizure, at Hukatere and Totara North, showed how prolific the drug was in New Zealand, and there were increasing reports of contaminated houses.
"The police have done an incredible job, but we all need to work to stop the scourge. We don't want our sales consultants entering P-contaminated homes, and we don't want them selling P-contaminated homes. Standardised and mandatory testing would be ideal," he added.
A property where methamphetamine had been used or manufactured was likely to be contaminated with dangerous chemical residue, which could have serious health effects. The long-term effects of the chemicals produced from cooking meth would only be known once the people exposed to them began experiencing unusual health problems, but short-term effects could include asthma-like symptoms, breathing difficulties, skin rashes, eye irritations and nausea.