Domènech carried out a number of renovation projects for his political colleagues. Francesc Macià, a military engineer and politician who became president of the Generalitat, commissioned him to renovate the interior of his house in Lleida, the Macià chalet. It is the last work Domènech carried out in Canet de Mar. As was the case with most of his works of this period, he had the collaboration of his son Pedro and his son-in-law Francesc Guàrdia. The Domènech family had their second residence in Canet de Mar, in the old Rocosa country house. This building did not have enough space to house the architect's large family and his studio. In 1877, they bought two houses on the corner of Riera Gavarra and Riera de Buscarons, which were connected to the house by the rear courtyards. Masia Rocosa became the architect's office and workshop and the new building the family residence. A first unrealised project is preserved at the Fons Cabruja in Canet de Mar. In 1918, a building permit was requested for the renovation and restoration of the Domènech house of the project that was finally carried out. The original building, on a corner at the confluence of the two streams, was two small 17th-century buildings. The previous constructions were not demolished, but a large part of the walls were reused. Domènech went up again and redistributed and ennobled all the openings, adding a hall with exposed brick arches at the top and monumentalising the chamfered corner with a tribune decorated with floral and zoomorphic elements. Inside the house, all the rooms were renovated, ensuring that all the rooms had windows on the outside. A staircase with ceramic risers connects the ground floor with the first floor, leading to a double-height entrance hall. On the floor of this space is a walk-through skylight that brings light from the upper skylight to the ground floor. A spiral staircase connects this space with the perimeter balcony on the first floor. Several rooms in the building contain the plaster casts of some of the sculptural works in its buildings. In 1980, it was renovated to house a bank and an extension was built in the garden. After the transfer of all the buildings to the Town Council and a second refurbishment in 2011, it is now a facility that houses the Domènech i Montaner House-Museum in Canet de Mar.

'La Caixa' acquired the Domènech de Canet de Mar estate which was composed of an 18th century country house, a house built by Domènech i Montaner and a garden shared by both. The intention was to locate its bank headquarters there, building a pavilion in the garden and adapting the modernist house, leaving the restoration of the country house for a future intervention. Later, however, it was ceded to the Canet de Mar Town Hall and became the Domènech i Montaner House - Museum. The project is mainly based on the creation of a new pavilion that relates the Domènech House and the old country house in a different way. The relationship with the modernist house is based on two basic considerations: respect for the building's architectural uniqueness and the conservation of the character of the house's enclosed garden, which formed an overall image of a strong urban presence. To achieve these two objectives, it is proposed to build a closed volume that faces the Riera, respecting the height of the garden wall and that connects coherently with the exterior balcony with which Casa Domènech ends over the Riera.