Hi Kiran. Welcome to the forum

I'm not sure whether or not India has a national LOD specifikation or not. But in alot of European countries and in the States alot of people refer to the buildingSMART standards. Which you can download from here: LOD | BIMForum

Good luck

That's a good document. One of my coworkers is really into that LOD-400 stuff, he's been working on coordination projects that my firm has been getting lately. He's been modeling pipe and duct hangers and all sorts of crazy stuff. My focus has been firmly in the 200 to 300 range, trying to optimize our families for engineering design rather than realism. For instance, I don't slope drainage pipe. I know how to do it, but it slows me down tremendously and the single-line graphics in my families simply don't work with it. Sinks are boxes with pipes sticking out of the back. Rooftop Units are boxes, maybe with a weather hood on the side I'm feeling fancy. I'll bake in formulas and parameters to make our job easier, but we're not getting paid for elaborate 3D objects and no one is asking for it.

Better to focus on Level Of Information. A box with a full description of what it is and its properties is more useful than a detailed 3D model, that gives a false sense of accuracy/space in the design phase and doesnt actually tel you what is specified..

To answer the original question I would say; Yes, you can upgrade 300 to 400, but dont underestimate how much work that is and how much experience (Ideally on site or making work drawings for contractors) it actually requires to model things right. Also question who you are doing it for... is a contractor actually going to use your LOD400 model?

...but it is nice if you can afford to make beautiful fully detailed models

Disclaimer: I care not about LOD.

IIRC LOD400 is fabrication - so you need to move out of Revit, unless all you ever work with is chunky stuff.

I couldn't have said it better myself!