Can Negre was a farmhouse, which Jujol renovated between 1914 and 1926, at the behest of the family.
The refurbishment focused especially on the façade, the staircase and the chapel. In the first, Jujol gives examples of a global and quite detailed conception of his work, while showing an obvious respect for the existing façade by maintaining the openings that explain the interior wall compartmentalisation.
The exercise he carried out on the main façade clearly shows his intentions, which were collected in a single project drawing.
Different rows of flat tiles are added to emphasise the undulating curve of the cornice. Another small cornice is also introduced, which includes that of the side façade. Two side tribunes appear flanking the main tribune which evokes the shape of a float. This one, with meticulous forging work, has two "legs" that rest on either side of the main door, making it even more prominent.
There is also an effort to compensate for the imbalance in the original building, with the placement of a covered gallery, as if it were a semi-detached house, and with the use of polychromy on the façade.
For Jujol, the black house has a special religious significance as well as tradition and popular culture, and that is why he strives to show the transfiguration of an anonymous and conventional element into another with a strong presence of the architect's hand.