Microsoft could relocate its entire 2,000-strong workforce in Ireland to a new headquarters in Leopardstown.
The tech multi-national has received permission from Dun Laoghaire/Rathdown County Council for the development, subject to conditions including the payment of €8.3m in development levies.
In all, 35 conditions were stipulated in the grant of approval for the development on a three-hectare site at South County Business Park on Leopardstown Road in Dublin 18.
Microsoft already has a large premises in the Sandyford Industrial Estate as well as existing offices at South County Business Park.
A response was not received yesterday evening on what is planned for these buildings.
The council has asked Microsoft to pay €378,366 to help fund an open public space in the area and a further €1.17m for parks infrastructure.
Some €3.9m is to go towards improving the roads. The council has also asked for €2.4m to assist in paying for the extension of the Luas Green line from Sandyford to Cherrywood.
The HQ plans are for a four- to five-storey building over a two-level basement. It would include a gym/leisure centre.
Microsoft opened its first operation in Ireland in 1985.