About $40,000 of work was done on it before the sale.
More than 100 people packed the auction room for the house, which was listed with a capital value of $610,000.
"There were 47 vigorous bids from seven purchasers before the home sold for $846,000," Megan Jaffe said.
Feedback from buyers had been that it was "a staggering price".
The house had been on the market for only a week, and 72 groups visited during open-home showings in the first weekend, she said.
"The strong buyer interest necessitated the auction be pulled forward as a short notice auction," she said.
The buyer was a business executive, with two pre-teen children who had been renting in Orakei and had been looking to buy for some time.
"Orakei has become very popular with executives and families as quality homes on good sized sections are in good supply, with a very convenient location and lifestyle to the city and the Bays," Megan Jaffe said.
Ray White agent Mike Zelcer, who sold the house, said the house had many desirable features including a flat section "not too large, not too small, at 513sq m."
Ms Blair said that pre-sale work included landscaping, exterior and interior painting, deck staining, rewiring and the installation of a new hot water system.