Two of the three floors had communal showers and there was only one guestroom in the entire guesthouse with a fully equipped bathroom. At the time, this was the best suite in the house. Back then, the "post bus" was an important means of public transport and linked the Alpbach Valley to the important Jenbach and Brixlegg railway stations. The post buses used to turn around right in front of the Galtenberg guesthouse. As a result, the Galtenberg guesthouse also had a post office with mailbox as well as what was then the first public telephone in the building. The mailbox still exists today and is emptied every weekday by Austria Post.
A double garage for cars was added in 1950. At the same time, arrangements were made to potentially add additional floors to this extension in future.
A significant extension and renovation of the Galtenberg guesthouse took place in 1960. The cellar and the ground floor were extended. The top floor was also optimised and equipped with dormer windows on both sides, a typical feature of the era.
The Galtenberg ski lift, which still exists today, was constructed in 1962 on the initiative of ski lift pioneer Andreas Mayer together with the involvement of the Galtenberg guesthouse. At the time, the lift was operated by a diesel engine and this continued until 2008. The route, the valley station and all of the lift supports along the route are still in place and in top condition. However, the technical facilities have naturally been brought up to the state-of-the-art in the meantime.
In 1965, two floors for employee accommodation were added onto the vehicle garage.
In the summer of 1974, after the Galtenberg guesthouse had been closed for almost 4 years, Ferdinand and Gertrude Kostner took over the Galtenberg guesthouse as leaseholders. As part of the leasing agreement, an option to purchase the guesthouse at a fixed price after one year of the lease had been agreed. All of the extended family and many local Alpbach residents helped to get the Galtenberg guesthouse back into shape after its long period of closure and it was put back into operation in the autumn of 1974. October 1974 was marked by the birth of son Frank.