Innogy said it would look to develop greenfield sites and acquire operational assets. It will also work alone or with partners on projects.
The new office will be led by Cathal Hennessy, formerly wind development project manager at Irish forestry board Coillte.
Hennessy said opening up in Ireland was a natural move for Innogy, following a period establishing itself in the UK.
"This is an exciting time for Innogy as a whole, but also for the Irish renewable energy sector. Innogy hopes to play a key role in assisting Ireland deliver on the objectives set out in its Energy White Paper of decarbonising the electricity system over the coming decades," Hennessy added.
In October 2016, Innogy was floated on the Frankfurt Stock Exchange, raising approximately €5 billion for parent company RWE, which retained a 75% share of the developer.
Ireland has approximately 2.5GW of installed wind capacity installed at the end of 2016, according to Windpower Intelligence, the research and data division of Windpower Monthly.