Urunga at 2 Buena Vista Ave was bought last week by a local family with three young adult children for a confidential figure, but close to $20 million.

The sellers, Edmund and Ninette Braude, held their daughter's wedding in the courtyard.

The antique collector and his wife bought the property from piano wholesaler Peter Hayward in 1990 for $2.625 million.

Nick Gittoes of Atlas Lower North Shore said the purchaser liked the Commonwealth home, had previously held the old house and was looking forward to restoring and preserving the character of Urunga, which was built in 1901 on 2,640 square metres.

"It took a while to find the right buyer," he said.

"It's a heritage listed property that has been held for 32 years and there was a lot of work going on behind the scenes," he added.

Urunga entered the market in February last year and was represented by another agent for $25 million.

When Nick and his agent Anthony Godson took over late last year, the guide price had been revised to $22 to $24 million and the agents began repainting and refreshing the five-bedroom Queen Anne Federal Estate.

They also encountered international interest, but ultimately it was the locals who saw the value and potential of the property.

Anthony said 118 buyers made inspections, 15 contracts were requested and seven offers were received.

Potential buyers liked the double street access, the possibility of a garage and the possibility of an addition at the back of the property.

The sellers, Edmund and Ninette Braude, held their daughter's wedding in the courtyard. The antique collector and his wife bought the property in 1990 from Peter Hayward, a piano wholesaler, for $2.625 million.