This data is from the Tenancy Bond Service of the Department of Building and Housing, and as such it is very comprehensive.

A typical month sees more than 10,000 bonds registered with the service.

This series tracks the rents for 'new' rentals, the rent when tenants move into a property - it is not tracking rents of renewals on existing properties.

The 'median' rent is the middle price. It is different from the 'average' rent (also known as the 'mean'). For example, the median is the series of numbers 1,2,4,5,16,25,40 is 5 - that is the middle number. But the average of that same series is 13.29 - where you add them all up, and divide by the number of them.

A vast amount of data is available to us, but in addition to the totals, we track only two benchmarks 1. a three bedroom house 2. a two bedroom flat. These are the two categories with the highest volumes on bond registrations.

The main centers chosen in our chart are only for the strict city council area - they do not represent the metropolitan region.

Contact us if you need different details - we have quartile data, volumes, a much wider range of housing unit descriptions and bedroom numbers, and every local authority in the country covered.