Regarding GST on Residential Flat

A single project will built Residential flat and Commercial shops having residential flat  800 sq ft salable carpet area with value Rs 30 lack and 1200 sq ft salable carpet area with value Rs 47 lack.

So my query under GST is that, can we consider this single project as affordable and non affordable Housing project and can charge the GST @ 1% on 800 sq ft are flat and GST @ 5% on 1200 Sq ft area flat ?

Thanking you.