The street sign clearly displays "Ascaill Uí Choileáin" and "Collins Avenue," which points directly to Ireland. The bilingual Irish and English signage is a definitive marker for the region. The architecture, with its mock-Tudor style and red-tiled roof, is very characteristic of suburban Dublin. The overcast sky and general urban layout further support a location in the Irish capital. I am quite confident this is in Dublin.

then: guess