The organisers said the raffle tickets were mixed up in a bucket before being drawn on air during the Classic Hits Rotorua Breakfast Show, on December 14.
"I was at work actually, just doing normal stuff. I had heard earlier in the morning that it was being drawn and thought 'fat chance of me winning'," Mrs Tulloch said.
Surprisingly, she received a phone call from radio presenter Paul Hickey and realised instantly what was happening. "I just went silent," she said with a laugh.
Mrs Tulloch said she had a "blended" family with 12 grandchildren so the playhouse was getting a pretty good workout at her home in Owhata.
G J Gardner Rotorua franchise owner Graham Fuller said they had raised $4700 for the Rotorua-based BayTrust Rescue Helicopter, as a result of the raffle.
Mr Fuller said the BayTrust Rescue Helicopter did a great job around Rotorua and deserved the support.