Heine Haus, Cultural heritage museum in Ottensen, Hamburg, Germany.

The Heine Haus is the garden house built in 1832 in the neoclassical style for banker Salomon Heine in Ottensen, now an outpost of the Altonaer Museum. Its upper floor housed the gardener, while the oval, stucco-decorated Gartensaal on the ground floor served Heine as a retreat. A Salomon Heine monument by Klaus Luckey stands in the front garden.

The building was constructed in 1832 as a garden house for Jewish banker Salomon Heine. It received monument status in 1962 and underwent restoration by the Heine Haus Association in 1979.

The house is run by the Heine-Haus e. V., founded in 1975 after neighbour Helene Gropp complained in a newspaper letter about the garden house's decay. Since 1991 the association awards the Salomon-Heine-Plakette, a plaque by Klaus Luckey, for civic courage; recipients include Eric M. Warburg (1992, posthumous) and Erik Blumenfeld (1995).

The Heine Haus stands at Elbchaussee 31 in Ottensen, in the Heine-Park ensemble along with the buildings at Elbchaussee 31 a and 43. It has been an outbuilding of the Altonaer Museum since 1 January 2001. The house is run by the Heine-Haus e. V. association, which organises around twenty to thirty events a year, including readings, lectures and chamber music.

The garden house is the last architectural reminder of Salomon Heine on the site; the main house he used for his lavish parties was demolished in 1881. In 1989 the sculptor Klaus Luckey made a Salomon Heine monument for the front garden, and since 1991 the association has awarded a plaque of the same design for civic courage.