A promise tradies have to get it right when they sign-off their own work under new rules.

The Building and Construction Minister has announced a scheme to let approved firms and tradies like plumbers and drainlayers self-approve work on simple residential jobs.

Companies deemed reputable could opt-in.

Chris Penk says they'll have to undertake a process of promising quality.

"And there will be standards, obviously, that they've got to continue to meet, they've got to have the right sorts of assurances and insurance in place as well - so they've got every incentive to get it right."

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