"He has obviously got children himself, so he related quite strongly to what we offer right across our programme," she said.
"He is an incredibly busy man so we are very aware of that so we'll just work with him around his commitments."
The announcement comes just three weeks after the demolition of Youthtown's former central-city facility at 68 Nelson St started on January 5.
Ms Kearns said the property had been sold conditional on the site being cleared and was expected to become unconditional when demolition was completed in March.
She said the terms of the sale were confidential and she could not comment on rumours that it may have been sold to SkyCity, which is demolishing buildings on the adjoining block in Nelson St for its international convention centre.
Youthtown moved out of the building in January 2014 because of lead contamination caused by a private shooting club in its basement.
It moved its head office across the road to rented offices at 143 Nelson St, but has recently moved again to 110 Mt Eden Rd.
Ms Kearns said the charity was "continuing to look at various options in the central city".