Amerikahuset, Office building in Masthugget, Gothenburg, Sweden

Amerikahuset is a six-storey concrete building with an attic in the Koggen district of Masthugget, at Barlastgatan south of Oscarsleden. It covers 11,230 square metres and is listed in the city's preservation programme, so it may not be demolished and may only be renovated with great care. It now holds 56 apartments and 5,000 square metres of offices and shops.

Svenska Lloyd founded Svenska Lloyds Verkstadsaktiebolag in 1916 to repair its ships in Gothenburg harbour, and the building was erected 1919–1925 to designs by Arvid Bjerke and Ragnar Ossian Swensson. Construction halted in the crisis year 1921, and in 1923 the property passed to Svenska Amerika Liniens fastighetsbolag, which rebuilt it in 1925 with Sven Steen and Olof Sellman as architects for offices, warehouses and a laundry. The Waidele family bought it in 1959 for 2.4 million kronor and sold it in 1987 to Coronado, which mortgaged it for 132 million kronor before the property crash; state-owned Securum then took it over for seven million kronor.

The name Amerikahuset comes from Svenska Amerika Linien, which took over the unfinished building in 1923 and converted it for its offices, warehouses and laundry. The natural-stone sections above the entrance were carved by Johan Axel Wetterlund. Since 2000 the property has been owned and managed by Castellum.

Amerikahuset stands at Barlastgatan in the Koggen block on Södra Älvstranden, south of Oscarsleden in Masthugget. The building is covered by the municipality's preservation programme, so it may not be demolished and may be renovated only with great care. Its 11,230 square metres hold 56 apartments plus 5,000 square metres of offices and shops.

The building underwent major renovations in the late 1990s and now combines offices with residential apartments and retail shops inside. This transformation shows how the city's old shipping buildings have adapted to serve new purposes.