These photographs taken in 1977 show views of the interior of the derelict North Shore goods shed on Norton Road and the exterior of the shed from the railway side.
The first of the images showing the North Shore branch line looks Northwest from Church Road with Portrack Lane crossing gates just visible in the distance. The second looks Northwest from Portrack Lane level Crossing towards Norton Road bridge with FW Hill factory in the distance on the right.
The red gates mark the former rail access to the Head Wrightson works.
Courtesy of Kevin McGowan. 
I think the line was originally twin track, although after the crossing gates at Portrack it broadened out to four tracks to allow a lot of shunting to be done by four wheeler tank engines.
I can confirm that the building was the Stockton and Hartlepool Railway station. It was used as a station from 1842 until the Leeds Northern Railway opened their station in 1852 on the site of the present Stockton Station. The S&HR station then became a goods shed with the west wall being knocked through to fit in tracks. Passenger trains entered from the north end. I have a colour slide of the station frontage and the south end. The booking office window was still extant in 1965 when I visitied the building. Incidently the Clarence did not actually build any stations as the passenger trains were horse drawn and tended to pick up and set down passengers wherever the tracks crossed a road. The company was seriously impoverished and any benefits it was planned to be for such as cheaper coal transport to Stockton was thwarted by the S&DR. The company was taken over by the West Hartlepool Harbour and railway in 1837 and later as the Stockton and Hartlepool was leased by the York Newcastle and Berwick in 1848 eventually to become part of the NER in 1857.
Steve if it was it was the second Stockton station, it served the Stockton & Hartlepool & the North Leeds railways. Down on the flat, passed just to the north by the north shore branch, off Norton Road was the terminus for the Clarence railway, on the edge of Seaham Street.
I believe the terminus was indeed on on this site, but this could be a later building. The offices at the front may well have been part of the original terminus.
Wasn’t this building the original Stockton & Hartlepool Railway terminus?
The third picture, which looks towards the crossing gates between the Bath Lane/Garbutt Street area and Portrack, shows the old Flour Mill. This is the group of tall brick buildings which stood between the level crossing and the ‘new’ Conservative Club(built around 1960). The Flour Mill was yet another business whose life and existence would have depended on the North Shore Branch.