Big commercial area/residential area.

[rituparnahoymoy]

Can I use words like " big,heavy" etc with commercial place and residential area?

This is a big commercial place. This is a bigger commercial place than the before.

This is a big residential area. ( lot of people reside in that place)

 

[Edinburgher]

"Larger" probably works better for this.

 

[Myridon]

I don't know what a "commercial place" is and "that the before" makes no sense.
A big/large residential area would be large in area not necessarily in population. Its size is the same whether anyone lives there or not.