Textile and construction in one gst

A textile dealer who has started building contract works is asking if they can operate both businesses under their existing GST registration. The advice given is that it's permissible to have both textile dealing and building contracting under the same GSTN, as registration is based on the place of supply. However, for easier and more accurate accounting, it's recommended to obtain separate registrations for each business line, especially as the SAC codes will differ.