Can anyone explain to my why the Data Protection Commissioner should actually need a large office? It seems to be a mostly administrative function and they hardly need barracks for an intrepid, roving army of go-anywhere enforcers, or garages to house their numerous SWAT-style vehicles? Sure, they need space to keep their files, but I suspect a lot of them can be stored on computers, I'm sure you've heard of those? They might even use remote storage, whatever that is...
Quite frankly, for the amount of good the DPC is doing, I'd prefer that it stays where it is rather than a higher cost Dublin site. I suspect the location is a holdover from the policy of decentralisation which, ironically, seemed to involve moving many of the government towards the middle of the country. There seems little point in moving them into Dublin City Centre, which can take nearly as long to reach even from the suburbs of Dublin as the current location.
BTW, for a different view of the building try the following link, it's not THAT small. http://web.archive.org/web/20141019192419/http://www.myhome.ie/commercial/brochure/canal-house-portarlington-laois/2786485