These buildings are one of the last remaining fragments of the old center of Thornaby that was mostly removed when the A66 was built.
The carved plaque over the doorway is for the ‘Corporation Institute’ the 1890 Bulmers Directory says “A Mechanics’ Institute was erected in 1865, in which are the offices of the Local Board and School Board” so this may be one and the same.
Closer examination of the doorway shows it once had a sign for ‘Auxiliary Fire Station’ the name of which suggests it dates from World War 2
However this old photo shows just the words “Fire Station” and it looks like a fire station existed on George Street soon after the formation of Thornaby on Tees in 1892
Following this link to see a picture of the station in what can be no earlier than 1973, interestingly there still an air-raid siren on top of the building.