The 63 year old was recovered from inside the detached cottage about 8km from Trim on Tuesday afternoon.
A garda spokesman said a neighbour noticed there were no lights in the house and when he investigated, he found the remants of a small fire in the sitting room and the man dead on the couch.
The man was pronounced dead at the scene by a local doctor on Tuesday afternoon. There was no structural damage to the house, just some smoke damage.
The gardai were satisfied it was accidental.
A post mortem will be carried out to determine how the man died and whether the fire was the cause of his death.