Auckland businessman Barry Hart has dumped four truckloads of dirt outside a Sandringham cafe.

A man who dumped 40 tonnes of dirt outside an Auckland cafe says the act "made my Christmas".

Barry Hart, the director of Central Site Works Limited and owner of Central Trucking Limited, dumped "four of the smelliest loads I could find" outside Xotic Sweets & Snacks in Sandringham on Friday.

He said the act was retribution for about $88,000 of unpaid bills that the cafe's director Jaspal Singh owed to both his companies and HT Drainage for demolishing a commercial building.

Facebook/Barry Hart Tonnes of dirt was dumped on the central Auckland site, near the corner of Mt Albert Rd and Sandringham Rd.

"We also intend to go in and take out all our drainage that hasn't been paid for - so all the pipes and what have you that are now under a building."

Hart said he began working with Singh in January.

He gave Singh a warning over his unpaid bills six weeks ago but had not received any money, he said.

"We will continue to tip off until we get our money or until the tipping pays for itself."

Hart planned to dump more soil at the site on Thursday morning.

Singh could not be reached for comment but his wife, Jasmeet Kaur, said the dirt dumpers were "just idiots".

She did not want to comment further as it was a personal matter, she said.

The police said they had not received any complaints about the incident or the alleged outstanding bills.