Only two businesses have chosen to return to the Porse House Building in Blenheim, despite it being given the all clear by structural engineers on Tuesday.
The Radio Network and civil engineers Opus International Consultants re-entered the building yesterday morning.
Opus acting manager Michael Petersen said he had evaluated the report and was comfortable with it.
The Marlborough Radio Network team said they had seen the report and were happy to be back in the building where manager Thelma Sowman said they would stay unless there was another major shake.
Classic Hits breakfast show host Scott Radovanovich was happy to get back into the building after travelling to Nelson to broadcast Tuesday's show.
"It was a long day," Mr Radovanovich said.
The station has looked at setting up a temporary radio station at the Clubs of Marlborough, or using studios in Christchurch or Wellington.
"So if there is a worst case scenario we have plans B, C, D and E," Mr Radovanovich said.
The Marlborough Primary Health Organisation has decided to stay out of the Porse building indefinitely, chief executive Beth Tester said. "We have relocated to the Wairau Hospital site. Clients were hesitant to come up to the fourth floor of the building so we decided to set up here," she said.
Child Youth and Family Services and Marlborough Community Law had also not returned to the building yesterday, although Community Law staff had reportedly been in the building before leaving after the magnitudes 4.3 and 4.4 aftershocks yesterday.
Building owner T H Barnes chief executive John Smithies said he could understand the tenants being apprehensive about returning to work, although he was confident with the building safety.
"I have been in there when it's shaking, not the 6.5, but some fives. No matter what building you're in it's unsettling.
"We are happy with the state of the building, we had two engineers independently review it and the council signed it off as being safe to occupy," he said.
Porse childcare also returned to its office situated below the Porse House building on Market Street yesterday.
- The Marlborough Express