The old administration building in Reken was built in 1897. Originally the building was used as a two-storey school building for boys. Afterwards the Reken-Heiden office moved into the building and found its place there from 1933 - 1974.
The total circumference of the Reken-Heiden office in 1951 was around 135.50 square kilometres. The number of inhabitants increased over the years from 5,016 in 1895 to 11,648 in 1950, and in 1979 the municipality of Reken-Heiden became the municipality of Reken as a result of municipal restructuring. The municipality of Reken therefore celebrated its 50th anniversary in 2019.
After the administration had moved to the new town hall at the end of 1974, the building of the old town hall was then used initially as a pastor's and youth home of the Catholic parish of St. Heinrich.
The building subsequently became an open youth centre in the 80s. Later called Flash 23, a youth club with leisure activities. Since the youth centre also needed more space, it moved out of the building at Hauptstraße 23. After a short period of vacancy, the Altes Amtshaus has now been completely renovated and modernised.
On the ground floor of the Altes Amtshaus is the Mensing bakery, which was founded as a family business in Ramsdorf in 1842 and continues its tradition with a branch in the Altes Amtshaus.
The upper area of the Amtshaus is now used as modern accommodation. With 5 rooms and a complete penthouse apartment on the top floor. There is a safe place in the basement of the house for bicycles that you bring with you to park them and charge e-bikes.