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AHB Categorisation

This section provides an overview of AHB categorisation.

Categorisation is an important regulatory tool used by the Regulator, as it allows for greater clarification on organisation types, and operational and funding models that exist within the AHB sector.

AHBRA categorised AHBs into the following five key areas based on their size, funding, and operational models. This breakdown greatly assists the Regulator in applying proportionality across the sector.

AHB Category


Micro Less than 20 dwelling
Small Between 20 and 100 dwelling
Medium Between 100 and 1,000 dwellings
Large 1,000 dwellings or more
Care and Support Less than 1,000 dwellings and one of the following critieria:

More than 50% of the income comes from HSE and/or Tusla
More than 200 FTE employees
Income per dwelling is more than €20,000
No dwellings but has income


Categorisation enables more effective application of risk-based regulation. As the regulatory framework advances, it will provide AHBRA with enhanced trend analysis informing our monitoring, assessment, and educational programmes.

This crucial information enables the Regulator to consider the most appropriate regulatory approach and the most appropriate actions.

AHBs are required to inform AHBRA of changes or events which may have a serious or significant impact on their organisation. These are known as ‘Notifiable Events’. Information and guidance relating to Notifiable Events is available on our website Notifiable Events – Approved Housing Bodies Regulatory Authority (


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