Son of the sculptor and image-maker Dionís Renart i Bosch (1852-1922), he started out in his father's workshop, together with his brother Joaquim Renart, before attending La Llotja, the Barcelona School of Fine Arts. He was also a student of Josep Llimona.

On a trip to Paris, he was struck, as were so many other Catalan artists, by the work of the sculptor Auguste Rodin. He specialised in funerary sculpture and imagery, and in making medals, a field in which he stood out.

The works of this sculptor's early period, such as Eva (Eve, 1906; MNAC collection), which won a medal at the International Exhibition in Barcelona in 1907, and Gerro amb figura femenina (Vase with Female Figure, MNAC collection) are fully in tune with Modernisme. A few years later he concentrated on religious and studio sculpture.

He was not active in the Modernista intellectual movements, but rather kept himself socially isolated.

One of his great hobbies was astronomy, which led him to contribute to various Catalan and European scientific journals, and he was one of the founders of the Astronomy Society.