Municipal Authorities said on Monday the fatalities had topped 23 as search and rescue crews were still working at the site of the disaster, a week after the accident in the city of George in the Western Cape province.
An investigation is underway to establish the cause of the collapse.
The country’s public works minister was due to visit the accident scene on Monday, local media reported.
On Saturday, a man was pulled from underneath the rubble, 116 hours after the accident.
The building whose construction was approved last July was meant to be a 42-unit apartment block. It came down shortly after 2:00pm local time on Monday.
Around 75 construction workers are believed to have been on site at the time of the accident.
15 people remain hospitalized and many are still missing. There have been allegations that most of the crew were foreign nationals.
