It has grown to a team of 24, with a new branch opening in Kawerau last year, just as New Zealand entered the first Covid-19 lockdown.
During this time, the couple upgraded their fleet, rebranded the business and updated their office systems - from manual to digital - as well as uniforms, business cards and tidy vans.
Master Plumbers Gasfitters and Drainlayers said this showed the company's emphasis on top-quality service-and a 24/7 emergency service.
The company was also acknowledged for being committed to growing its own qualified tradespeople, with a steady flow of apprentices coming through.
Aaron still got out on the tools when he could, which saw his skills passed on to the next generation of plumbers and gasfitters.
With two young boys of their own, the couple placed a strong emphasis on family values in the workplace and always tried to accommodate their staff's needs.
"We want our staff to be proud of the company they work for," Sarah said.
"Reputation is key."