These new settlers require a living accommodation and are in continuous search of houses for rent. Almost all the big metropolitan cosmopolitan cities of the world are crowded by a migrant who comes to the cities for better living standards and career opportunities. People with transferable jobs also come to these cities due to their service requirements and they also seek rented accommodation.
These trends have resulted in huge demand for rented properties which have tremendously increased the property rents and a shortfall in availability. You can also find a flat in London through estate agencies.
People who are mobile and need to shift from one place to another due to the nature of their job and requirements find it easier to have a rented accommodation than buying a house because of their variable duration of stay.
Having rented accommodation also provides them the flexibility as they can anytime leave the rented house and move to some other suitable location as per their convenience. Big cities of the world attract thousands of people every year and this attraction results in a shortfall of inhabitable land in big metros.
Having houses rent becomes very fruitful here as it helps both the house owner and the prospective tenants. This huge demand has given a good opportunity to the real estate developers in these cities who now concentrate on building residential houses in city outskirts and suburbs at affordable costs.