The earliest records of Grenon are from Paris, where he worked first in the Notre Dame Cathedral, and on the death of his brother moved to a job at the St Sépulchre as a canon.
His secular music is the most up-to-date, and includes examples of each of the prevailing formes fixes, the ballade, the virelai, and the rondeau.
Grenon also wrote masses, but none survive complete; only a fragment of a Gloria remains, not enough to establish his stylistic technique for this type of composition.
Grenon's complete surviving works are edited in Gilbert Reaney, Early Fifteenth-Century Music, vol.
The pieces are, in Reaney's order: Craig Wright (Grove, 2001) argues for the ascription of Argi vices/Cum Pilemon (attributed in the Aosta codex to "Nicolao") to Grenon as well.