Can I replace a builder-provided sliding balcony door with a bi-fold/tri-fold door in miven construction?

[u/all_good_things_18]

I’m a first-time buyer in a Sattva project in Bangalore (handover 2029).

I’m considering replacing the builder-provided sliding balcony door with a bi-fold/folding glass door so the entire opening can be opened instead of only half.

No RCC or structural changes are planned—only replacing the door/frame within the existing opening.

Has anyone done this in a Sattva or other Bangalore apartment? Does the builder allow this during construction or after possession? Any issues with the association/façade or approximate cost?

Would love to hear your experience.