What are rbi guidelines to avail the home loan in delhi ncr?

Have a look at the official notification by RBI. Not much Have been changed since this notification I beleie so this will be useful.

Link:https://rbi.org.in/scriptts/BS_ViewMasCirculardetails.aspx?id=9851

Only one change is there,

The loan-to-value (LTV) ratio for loans between Rs 30 lakh and Rs 75 lakh is increased to 80% from the existing 75% and the risk weights in this category have been reduced to 35% from the existing 50%. For loans above Rs 75 lakh, the risk weights have been reduced to 50% from the existing 75%. Standard asset provision for all individual home loans is kept at 0.25%