Nyhavn 23 is a Neoclassical property overlooking the Nyhavn Canal in central Copenhagen, Denmark. It was listed in the Danish registry of protected buildings and places in 1918. A plaque on the facade commemorates the composer Friedrich Kuhlau, who resided there in 1832.

The building is four stories tall and four bays wide. Above the door is a stone plate from 1804 featuring a beer jug. A side wing extends from the rear side of the building.