unlike fat, it takes about 600-1600 surplus calories to build a pound of muscle. Not sure of figure, but it is a lot less than fat.
So, unless you think you can put on many pounds of muscle per week, I would go no more than 500 calories over maintenance per day. I burn about 3000 per day, so would try to eat 3500 at most.
When I was a labourer burning 4500, would eat 5000.
Even with 500 extra per day, you will probably put on a bit of fat, but better to be safe rather than under eat searching for magical number.