Church with a single nave and chevet and with a semi-cylindrical apse. Sculptural ornamentation in the form of blind arcades that follow the whole upper part of the building's perimeter. Square bell tower, with the two upper tiers decorated in Gothic style. Façade decorated with a double set of columns, sculpted capitals, chequered archivolt ornamentation and a finely worked monogram of Christ. Medieval wrought iron door bolt.

The church was declared an Item of Cultural Interest in 1991.
The Assumpció de Cóll forms part o the Catalan Romanesque ensemble of the Vall de Boí (Alta Ribagorça - Spain) and was declared a UNESCO World Heritage Site on 30th November, 2000.