Købmagerhus is a commercial building situated at the corner of the shopping street Købmagergade and Silkegade in central Copenhagen, Denmark, built in 1898 to a Jugend style design by Chr.

A plaque on the facade commemorates that Niels Steensen was born on the site.

Jøbmagerhus is a four-storey corner building, with a six-bay-long facade on Købmagergade, a 13-bay-long facade on Silkegade and a chamfered corner bay.The corner bay is crowned by a gabled wall dormer and a tall roof lantern.The facade on Købmagergade is crowned by a demi-circular wall dormer.

The facade is on the first floor decorated with painted foliage ornamentation between the tall windows.

A plaque on the side that faces Silkegade commemorates that Niels Steensen was born on the site.