That is why rental units in peripheral areas of the city, which tend to be farther away from jobs and public services, are less attractive and therefore fetch much cheaper rental rates. But informal settlements in peripheral areas tend to be built fairly close to growth centers where jobs and transport are not too far away, and other public services are beginning to appear. These pioneering settlements in peripheral areas of the city also become important sources of rental accommodation of various sorts, and as the city grows over time, the access to public services in these settlements — and their rental units — will get better.