Deviations to include Castletown were drawn up as an alternative plan also saw the town bypassed completed by a landward route between Ballasalla and Ballabeg.

The rather limited facilities reflected both the comparative newness of Port Erin as a seaside resort in the early 1870s, and also the financial difficulties faced by the railway in completing the line.

However, after the opening of the railway, Port Erin developed rapidly, overwhelming the original facilities which were systematically replaced 1902-1905, with further extensions in 1912 and 1914.

This building was extended in the mid 20th century: the extension is now the mess room for locomotive crews, though it was built as a ticket office for Isle of Man Road Services, a subsidiary of the railway company.

This extension, which also provides part of the station toilets, has in the past been home to the local Royal National Lifeboat Institution charity shop among others.

This structure replaced a much older version in 1998, which had previously seen use as an overspill ticket office at Douglas station prior to that point.

The tower is in a similar style to the original, being of local stone, and houses the station's oil store beneath the tank.

An original feature, the miasma tower, long since removed, was reinstated atop the roof and track realigned onto a curve at the headshunt.

Foundations were also laid with the possibility of a short platform being added in the future beside the museum and locomotive; to date there are no plans to install this feature.

Housed in a former bus garage, the museum was opened in 1975 and has a number of exhibits charting the whole history of the railway; before it opened, the goods shed (which today houses the associated souvenir shop and entrance hall) had acted as locomotive shed for several years, whilst two out-of-service locomotives (Nos.

The museum was originally accessed via a purpose-built porch on the adjoining Station Road, but this changed when the whole site was refurbished in 1999.

At the eastern end of the station is a level crossing (one of the last remaining manual ones on the railway, automated in 2011) across Droghadfayle Road.

Until the yard trackwork was re-laid in 1999-2000 the locomotive crew had to open and close the gates whilst "running round" to couple onto the train for departure, but this can now be done without disturbing traffic as the pointwork has been modified to accommodate this.