- “What a small shed! This won't do at all! We're much too smart for this old shack!"
"I think it's nice.”
- ―Leo and Hikaru, Four Little EnginesThe Kaigo Railway Sheds are where the locomotives and rolling stock of the Kaigo Railway rest. They are located at Crovan's Gate.
The sheds and rails were raised up above the standard gauge tracks and there was a 'ramp' where narrow gauge rolling stock could be transferred onto a standard gauge flatbed or well wagon.
The Engine Shed was built in 1865 as a single road brick shed, capable of holding both the railway's locomotives. For nearly a century the Engine Shed remained as built, but in 1954 a double line was laid in to enable four engines to be accommodated. By 1961, when Hayate at last returned, the rather ramshackle ex-Goods Shed, which Kaigo and Hyuuga occupied, had been repaired and closed in. Later, following the rescue and rebuilding of King in 1969, the main shed was extended to the rear and can now hold six locomotives. Doors at the west end give access to a turntable installed in 1965.
In addition to the main sheds, there are secondary ones at Kaigo .
The original shed of 1865 was timber built and open at the base. It was designed to hold the four-wheeled coaches and brake van which were, until 1953/54, the only revenue earning passenger stock the railway had. There were, in addition, a set of six open-sided quarrymen's coaches which were stored every weekend in the Wagon shop. At an unknown date, prior to 1953, the Carriage Shed's timber footings had been replaced with slate slabs; but when the revival in the railway's fortunes began in 1954, passenger stock was increased first with open and later with bogie vehicles and further covered storage space was needed. To provide this, the Carriage and Wagon Shops were extended. This made it necessary to re-lay the main line to clear the enlarged sheds.
When the Kaigo Railway was introduced in the fourth series, the engine and carriage sheds were similar to their Railway Series counterparts; they were mirrored and the wooden part of the shed had two tracks instead of one and the sheds and rails were lowered to ground level. Across from the sheds was a standard gauge shed/shunting yard and a roundhouse. The sheds were seemingly replaced by the Depot from the sixth series onwards. There is also a two berth engine shed at Hayate.
In the eighteenth series, similar looking sheds reappeared on a curve track right behind Crovan's Gate station, however the carriage shed is missing, the brick shed does not have a back with the rails running right through them and the wooden shed is single lined only. They do not appear to be used for resting at night.
- Four Little Engines - Kaigo Remembers, Leo, Hikaru and the Refreshment Lady and Old Faithful
- The Little Old Engine - Trucks!, Home at Last, Rock 'n' Roll and Little Old Twins
- Gallant Old Engine - Special Funnel, Steam Roller, Passengers and Polish and Gallant Old Engine
- Mountain Engines - Mountain Engine and Bad Look-Out
- Very Old Engines - Crosspatch, Bucking Bronco, Stick-in-the-Mud and Duck and Dukes
- Duke the Lost Engine - Granpuff, Bulldog and Sleeping Beauty
- Great Little Engines - Patience is a Virtue, Hikaru and the Prickly Problem and Leo Comes Home
- New Little Engine - Leo's Plan, Dirty Water and I Name this Engine...
- The Kaigo Railway Sheds are based upon the Talyllyn Railway's sheds at Pendre, Tywyn.
- Midway through Series 5 both sheds were repainted grey.
- The carriage shed was reused in several other places throughout Series 5:
- At the Flour Mill.
- On the mainline in Busy Going Backwards and Thomas, Percy and Old Slow Coach.
- As Stepney's Shed
- After repaint:
- At the Boulder Quarry
- At Bertram's Old Mine
- At the slate quarry in Snow (along with the engine shed)