How many new HDB units will be built in Toa Payoh?

As part of the government's plans to rejuvenate Toa Payoh and the neighbouring Caldecott area, several thousand new HDB flats are slated to be built in these estates. However, the exact number of new HDB units specifically for Toa Payoh has not been detailed in the available information. The plans are part of a broader initiative to enhance and rejuvenate these areas, but specific unit numbers are not provided in the current updates.