The following text is from the original listed building designation:

750/0/10040 Engine Shed, Newton Railway Works
18-SEP-01
GV II
Railway engine shed. c1860 for the South Eastern Railway. Built of red and yellow brick with a corrugated asbestos sheet roof. The original block comprises 14 bays by 3 bays and had three running lines entering its western end. The bays are recessed rectangular panels with rubbed brick round headed arches to round headed windows. The articulation of the bays is similar to the other shops of c1850 but not those of c1870, so a date between is indicated. The shed was extended a further 7 bays to the west in 1909-12 and later a single bay annexe 5 bays in length was added to the western end of the southern side.
Interior not seen at time of inspection (July 1998)
Reason for listing: Included for its group value at the centre of the early railway works layout and for its key use as part of the locomotive establishment. The engine shed at the two other major surviving works, Wolverton and Swindon, does not survive. Running repairs and maintenance were an important aspect of a locomotive establishment's work and this is represented here. The original 1847 engine shed was demolished in 1932, which has increased the importance of this surviving shed.
Reference: RCHME, The Railway Works, Ashford, Kent, 1990.
Listing NGR: TR0182441632

Description from record TR 04 SW 66 :
A second engine shed built some time between 1858 and 1872. Originally of 14 bays by 3 bays and had three running line entering its western end. The bays are recessed rectangulkar panels with rubbed brick round-headed arches to round-headed windows. The articulation of the bays is similar to the machine and carriahge shops of 1850. It was extended by a further 7 bays on the west, in a simialr style, as part of the 1909-12 works . At a later date a single bay wide annex, five bays in length was added to the western ens of the southern side. (1)

in 1991 it was being used as an indoor karting track.

Additional bibliography. (2-3)

Historic England archive material: BF092237 NEWTON RAILWAY WORKS, NEW TOWN ROAD, NEW TOWN, ASHFORD Miniature Format Film Number: 116/K,138/X,138/Y,138/Z

<1> RCHME, 1991, The Railway Works Ashford, rchme report p13 (Unpublished document). SKE6767.

<2> Alan Baxter & Associates, 2004, Ashford Railway Works - Historic Buildings Assessment (Unpublished document). SKE16615.

<3> Museum of London Archaeology, 2008, Newtown Railway Works, New Town Road, Ashford: A Standing Building Survey Report (Unpublished document). SKE16614.