The new station had four platform faces - two outer platforms, and two inner platforms sharing an island between the southbound line from Patchway and the westbound line to London. The western platforms served trains between Bristol and Wales, while the eastern platforms served trains on the new line. The platforms were linked by a subway which led to the booking office, situated on ground level by the main entrance on the east side of the station. The approach road led south from the main entrance, towards the A4174. There were waiting rooms and large canopies on each of the platforms. There were goods facilities to the south of the road, on the west side of the line and covering the site of the first station. There was a goods shed with a loading platform on a passing loop, as well as a north-facing covered loading platform and a south-facing siding. An additional south-facing siding for coal traffic was added after the First World War. Opposite the goods yard was Filton Junction Signal Box, which controlled the junction and by 1948 had more than 70 levers.