The working group is made up of about 12 members and was reorganised by the council last year to be representative of the community.
It consists of both old and young members, stakeholders, those who frequently use the hall, and council representation.
Mr Stevens said the group met last week to discuss fundraising and an architect's brief.
He said the refurbishment work needed to be in line with the strengthening work.
"So that refurbishment can benefit strengthening work and vice versa. We want to make sure we don't waste any money in that area.
"If one happens before the other there could be damage to the work," Mr Stevens said.
He said once concept plans were drawn up the group would go out to the public for comment, to council for approval and fundraising would begin.
"There's a lot of support for the town hall in the town and it's a matter of using these people that are willing to help with the fundraising."
Mr Stevens said the parts of the hall most in need of refurbishment are the kitchen, the backstage area, the toilets and the connections between spaces.
He said the group would ensure the main auditorium was not damaged during the process.
"We're very keen to ensure the integrity of the acoustics are maintained," he said.
The working group's communications person, Winifred Bull, said they hoped to have the brief completed within the next month.
The group were delighted when the council committed to strengthen the earthquake-prone hall, rather than demolish it, last April.
"It's one of the few halls in New Zealand that has an auditorium that is practically perfect in terms of its acoustics, it's a wonderful performance venue.
She said the hall was also the only venue of its size in Martinborough, being able to hold up to 200 people.
Mrs Bull said they were hoping work on the hall would begin within the next 12 months.
