Seyfridtzska huset, Renaissance apartment building in Gamla Stan, Stockholm, Sweden

Seyfridtzska huset is a building at Stortorget 18 in Gamla stan, Stockholm, raised in the 1520s. Its present appearance dates from an 18th-century renovation carried out at the same time as that of the neighbouring Grillska huset. The ground floor holds the café Chokladkoppen.

Seyfridtzska huset was built in the 1520s. In the 1620s it belonged to the furrier Hans Seyfridtz; after his death his widow Maria Seyfridtz remarried Johan Eberhard Schantz, owner of the neighbouring Schantzska huset. Both houses were renovated in the 1650s, and in the 1700s this house was renovated again together with Grillska huset, giving it its present appearance.

The building takes its name from Hans Seyfridtz, a skinner who owned it in the 1620s; after his death his widow Maria Seyfridtz married Johan Eberhard Schantz, linking it to the neighbouring Schantzska huset. Today the ground floor holds the gay-friendly café Chokladkoppen.

The ground floor houses Chokladkoppen cafe, which is open throughout the day and provides an easy way to experience the building from within. The location on Stortorget square means it sits at the center of the Old Town, making it convenient to reach on foot while exploring the neighborhood.

The house takes its name from Hans Seyfridtz, a skinner who owned it in the 1620s. After his death his widow Maria remarried Johan Eberhard Schantz, owner of the neighbouring Schantzska huset, so both properties came under one owner. The ground floor now houses the café Chokladkoppen.