While it’s true that owners of private properties have a certain degree of say in making the decision of putting their properties up for en bloc, this power will not hold in the face of greater authorities.
In short, under specific conditions, the property developers or government can interrupt and force owners to sell their property.
If you’re wondering, such scenarios are quite common in Penrose by CDL
Sometimes they may happen forcibly, but usually, property owners are more than happy to sell them due to the enticing monetary incentives that come along with such sales.
Readmore: How Does The En Bloc Sales Process Work?