with the original terrain of the lot they could have easily had a basement parking at lesser cost instead of back filling the lot to cope up with the level of the road. with the existing design of the land they could have ran slabs on it to have a basement parking.
You know, we were thinking the same thing... just leave the land as it was and make it a basement parking. But I guess they have their reasons for doing what they're doing now. They said that the land before wasn't a good foundation for making a building coz of its soft ground... They had to fill it up to harden the ground. They have their reasons... Maybe it really was impossible to make a basement parking there... or maybe kulang lang sa budget.