I find an outgoing PhD fellowship pays 14,400 €/year. A domestic PhD student is seldom paid so high even considering the relative living fees. Moreover, the domestic PhD may still need to pay quite high tuition compared to Europe.

I think the stipend not enough to pay the house rent is very deplorable; housing is the very basic need to stay in any place.

is 14,400 €/year enough to pay the house rent in Europe?

Where in Europe? Europe is large and made up of many countries. Each country has a different range of rents and costs of living. Even within a country, rents may vary hugely.

@CaptainBohemian It depends also on the specific city and whether you're willing to share an apartment with someone else or not. For comparison, the PhD fellowship in my institution is around 16800 €/year, and students are generally able to afford a rent (also alone, with some caution).

@MassimoOrtolano does sharing an apartment means sharing a bedroom? That may be very uncomfortable unless in some special situation, like the people sharing the room with me are my very good friends or somehow wouldn't interfere with my acts even though they are unfamiliar with me, e.g. not producing noise to interfere with my studying or sleeping. But in general the latter is very unlikely; people sharing a room tend to interfere with each other, so I don't usually like to share a bedroom with others.

the outgoing fellowship 14,400 €/year I see is for PhD studies in Université Paris-Sud.

@CaptainBohemian No, I'm talking of apartments with one room for each guest. Most of the PhD students I know, either live with their partners or rent an apartment by themselves. A few rent an apartment shared with other guest, but each one has their own room. The point is how much you want to save each month. For instance, when I was a PhD student, I rent an apartment on my own. Paris is an expensive city, even for those who a have good job: you may indeed have to find a shared apartment.

@MassimoOrtolano Sorry that I don't quite understand what you mean by an apartment. Here our rented houses for residence are generally in the three kinds: a bedroom without bathroom (you need to use a bathroom outside your room together with people renting other bedrooms), a bedroom with bathroom, family house with 2 to 3 bedrooms, 2 bathrooms kitchen and living room.

In the first two cases, the landlords don't usually care how many people rent each of their rooms as long as they get the quantity of rent for each room they desire to get. So you can invite people to corent a room with you if you wish.

also, it's like Université Paris-Sud is not in Paris, but I am not very sure.

Actually, even in the third case, the landlords also don't usually care how many people rent their house as long as they get the quantity of rent they desire to get for that house. However, usually only the third-kind houses have kitchens.

@CaptainBohemian Just about everyone interested in a university is concerned with cost of living to some extent, so most universities provide some assistance. See universite-paris-saclay.fr/en/cost-of-living for example

Also u-psud.studapart.com/fr