"The new licensing year is fast approaching and we're encouraging plumbers, gasfitters and drainlayers to make sure they have a licence," Mr Pedersen said.
"Authorised tradespeople also need to carry their current authorisation card and we're urging consumers to ask tradespeople for this card before any work commences so that they can be assured that the work is being done by a competent tradesperson."
Tradespeople also need to ensure they have enough continuing professional development points in order to re-license, he said.
In January the board launched a campaign warning homeowners not to use unlicensed tradespeople for plumbing, gasfitting and drainlaying work over the summer break.
If a homeowner believes that work has been done by someone who is not authorised, or has concerns about the competency of tradespeople, they can make a complaint to the board.