It was renamed Carbrook in 1916 during World War I, when anti-German sentiment was high. The Kruger family may have been assisted immigrants not eligible for land orders, because there is no record of them having received government land orders, and Christian made application for the Gramzow selection on 23 August 1867 under the conditions of the Leasing Act of 1866. This Act enabled any Crown land offered for sale by auction or selection and not sold within 30 days, to be opened for lease. The term of the lease was eight years, and the land would be granted to the lessee as freehold following the final year's payment. Christian Kruger was able to pay off his lease some years in advance, and acquired the freehold to portion 203 on 31 December 1872. Like most of the German settlers on the Logan River reserve, the Krugers erected a slab and bark hut as their first dwelling, and concentrated on clearing the scrub, fencing the land and planting their first crop, which probably was maize. Within a few years the farm had proved viable, and the family was able to erect a larger and more substantial residence. According to a local tradition, the present farmhouse was built in 1871, the year Mrs Auguste Ernestine Kruger (née Raedel), Christian's daughter-in-law, was born. However, it is also possible the house was built , after Christian Kruger acquired title to the land. The Krugers constructed their farmhouse in the half-timbering or fachwerk method similar to the mid-19th century German farmhouses erected in South Australia (at Hahndorf, Paechtown, Lobethal, the Barossa Valley, etc.), and traditional to north German rural communities. Fachwerk, meaning shelf-work, involved the raising of an interlocking timber frame that was then infilled with masonry such as brick-nogging or wattle and daub. The latter was often rendered. Similarly constructed buildings identified in the Logan River district include: Apart from the farmhouse at the former Kruger's farm, none of these buildings survive. The Bethania Lutheran Church and the Eagleby Lutheran Church were constructed of brick, but not in the half-timbered fashion. Fachwerk buildings were not unusual on the Logan River Agricultural Reserve, but neither were they common. If an early farmhouse of slab construction was replaced by a more substantial house during the 1860s or 1870s, half-timbering was an option.